Trace Engineering PS Series User manual

Copyright Trace Engineering Company, Inc.
5916 - 195th Street N. E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
PS Series Inverter/Chargers
AE Configuration - Revision 5 Software
Owner’s Manual

TABLE OF CONTENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page
1
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS......................................................................................................................................3
GENERAL PRECAUTIONS..........................................................................................................................................................3
SPECIAL NOTICES......................................................................................................................................................................3
PERSONAL PRECAUTIONS........................................................................................................................................................4
INTRODUCTION...............................................................................................................................................................................5
UNIT IDENTIFICATION...................................................................................................................................................................7
MODEL NUMBER.........................................................................................................................................................................8
CERTIFICATION..........................................................................................................................................................................8
CONTROLS, INDICATORS AND COMPONENTS.....................................................................................................................9
ON/OFF POWER SWITCH...........................................................................................................................................................9
INVERTER/CHARGER CIRCUIT BREAKER..............................................................................................................................10
CIRCUIT BREAKERS.................................................................................................................................................................10
‘MAXIMUM AC AMPS IN’ SWITCH............................................................................................................................................10
LED STATUS INDICATORS.......................................................................................................................................................10
AC SIDE.....................................................................................................................................................................................13
DC SIDE.....................................................................................................................................................................................15
INSTALLATION.............................................................................................................................................................................17
LOCATION.................................................................................................................................................................................17
MOUNTING................................................................................................................................................................................18
VENTILATION............................................................................................................................................................................18
AC WIRING................................................................................................................................................................................18
DC WIRING................................................................................................................................................................................21
QUICK INSTALL.........................................................................................................................................................................26
FUNCTIONAL TEST.....................................................................................................................................................................27
MENU SYSTEM .............................................................................................................................................................................29
OVERVIEW................................................................................................................................................................................29
USER MENU MAP......................................................................................................................................................................30
SETUP MENU MAP....................................................................................................................................................................31
SWRC REMOTE CONTROL......................................................................................................................................................32
USER MENU..............................................................................................................................................................................35
SETUP MENU............................................................................................................................................................................44
OPERATION...................................................................................................................................................................................55
THEORY OF OPERATION.........................................................................................................................................................55
POWER VS. EFFICIENCY .........................................................................................................................................................56
INVERTER CAPACITY VS TEMPERATURE.............................................................................................................................57
OPERATING MODES.................................................................................................................................................................58
INVERTER MODE......................................................................................................................................................................59
CHARGER MODE......................................................................................................................................................................62
INVERTER/CHARGER MODE...................................................................................................................................................68
GENERATOR SUPPORT MODE...............................................................................................................................................70
AUTOMATIC GENERATOR CONTROL MODE.........................................................................................................................72
UTILITY BACK-UP MODE..........................................................................................................................................................80
UTILITY INTER-ACTIVE MODE.................................................................................................................................................82
ENERGY MANAGEMENT MODES............................................................................................................................................89
USING MULTIPLE INVERTERS.................................................................................................................................................92
TECHNICAL INFORMATION......................................................................................................................................................95
BATTERIES................................................................................................................................................................................95
APPLICATIONS........................................................................................................................................................................108
TROUBLESHOOTING GUIDE..................................................................................................................................................109
INVERTER/CHARGER TERMINOLOGY .................................................................................................................................114
SPECIFICATIONS AND FEATURES........................................................................................................................................117
DIMENSIONS...........................................................................................................................................................................118
INSTALLATION DIAGRAMS ....................................................................................................................................................120
USER SETTINGS WORKSHEET.............................................................................................................................................122
APPENDIX....................................................................................................................................................................................127
OPTIONS..................................................................................................................................................................................127
OTHER PRODUCTS................................................................................................................................................................129

TABLE OF CONTENTS
Page
2Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
REFERENCE TABLES & GRAPHS..........................................................................................................................................130
WARRANTY/REPAIR INFORMATION....................................................................................................................................133
LIMITED WARRANTY..............................................................................................................................................................133
WARRANTY REGISTRATION..................................................................................................................................................133
LIFE SUPPORT POLICY..........................................................................................................................................................133
WARRANTY OR REPAIR SERVICE REQUIRED....................................................................................................................134
INDEX ............................................................................................................................................................................................135
INDEX OF FIGURES
Figure 1, Identification Label.........................................................................................................................................................7
Figure 2, Certification Label..........................................................................................................................................................8
Figure 3, Inverter Controls and Indicators ....................................................................................................................................9
Figure 4, ‘Maximum AC Amps In’ Switch And LED Status Indicators.........................................................................................10
Figure 5, PS Series AC Side.......................................................................................................................................................13
Figure 6, AC Circuit Board..........................................................................................................................................................13
Figure 7, AC Terminal Block.......................................................................................................................................................14
Figure 8, AC Ground Terminal....................................................................................................................................................14
Figure 9, PS Series DC Side.......................................................................................................................................................15
Figure 10, Airflow Intake Location..............................................................................................................................................18
Figure 11, AC Wire Connections................................................................................................................................................19
Figure 12, Warning Label...........................................................................................................................................................21
Figure 13, Battery to Inverter Cable Connection.........................................................................................................................23
Figure 14, Multiple Point Ground System...................................................................................................................................25
Figure 15, Single Point Ground System......................................................................................................................................25
Figure 16, SWRC (Remote Control) ...........................................................................................................................................32
Figure 17, Trace PS Series Inverter/Charger Simple Block Diagram..........................................................................................55
Figure 18, Trace PS Series Inverter/Charger Output Waveform.................................................................................................56
Figure 19, Inverter Capacity vs. Temperature............................................................................................................................57
Figure 20, Three-Stage Battery Charging...................................................................................................................................62
Figure 21, BTS (Battery Temperature Sensor)...........................................................................................................................63
Figure 22, Relay RY7 and RY8 Sequence.................................................................................................................................75
Figure 23, Two-Wire Start Wiring Diagram.................................................................................................................................76
Figure 24, Three Wire Start Wiring Diagram (HONDA Type).....................................................................................................77
Figure 25, Three Wire Start Wiring Diagram (ONAN Type)........................................................................................................77
Figure 26, Selling Power from a DC Charging Source; Hypothetical Time of Day Operational History......................................84
Figure 27, Selling Power Stored in the Batteries; Hypothetical Time of Day Operational History...............................................85
Figure 28, Utility Interactive Line-Tie System with Battery Backup (120VAC models)................................................................87
Figure 29, Overvoltage Protection for Battery............................................................................................................................88
Figure 30, Series Configuration: 6-Volt Battery Wiring.............................................................................................................104
Figure 31, Series Configuration: 12-Volt Battery Wiring...........................................................................................................104
Figure 32, Parallel Configuration: 12-Volt Battery Wiring.........................................................................................................105
Figure 33, Series-Parallel Configuration: 6-Volt Battery Wiring................................................................................................106
Figure 34, Series-Parallel Configuration: 12-Volt Battery Wiring..............................................................................................106
Figure 35, AC Waveforms ........................................................................................................................................................115
Figure 36, PS Series Dimensions.............................................................................................................................................118
Figure 37, PS Series Bottom Plate Mounting Dimensions........................................................................................................119
Figure 38, PS Series – Showing Knockout Sizes for AC Wiring...............................................................................................119
Figure 39, PS Series Installation Diagram – Stationary Backup System..................................................................................120
Figure 40, PS Series Installation Schematic.............................................................................................................................121
Figure 41, AWG Wire Size.......................................................................................................................................................131
INDEX OF TABLES
Table 1, Recommended Minimum AC Wire Sizes To Breaker/Fuse Size at 75°C.....................................................................19
Table 2, Minimum Recommended Battery Cable Size Vs. Cable Length...................................................................................21
Table 3, Battery Cable to Maximum Breaker/Fuse Size.............................................................................................................22
Table 4, AC Input Default Settings .............................................................................................................................................64
Table 5, Battery Charger Default Settings..................................................................................................................................65
Table 6, Charging Setpoints for Common Battery Types ...........................................................................................................66
Table 7, Typical Wattage of Common Appliances....................................................................................................................100
Table 8, Battery Charging: Charging Setpoints ........................................................................................................................101
Table 9, Battery State of Charge Voltage Table.......................................................................................................................102
Table 10, Battery Cable Inductance.........................................................................................................................................107
Table 11, Typical Power Consumption of Common Appliances...............................................................................................130
Table 12, AWG to Metric Wire Conversion Chart.....................................................................................................................130
Table 13, Battery Cable to Maximum Breaker/Fuse Size.........................................................................................................131
Table 14, AC Input Default Settings .........................................................................................................................................131
Table 15, Battery Charger Default Settings..............................................................................................................................132
Table 16, Minimum Recommended Battery Cable Size Vs. Cable Length...............................................................................132
Table 17, Recommended Minimum AC Wire Sizes (75°C)......................................................................................................132
Table 18, Safety Ground Wire Size Table................................................................................................................................132

IMPORTANT SAFETY INSTRUCTIONS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page
3
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS!
This manual contains important safety and operating instructions as prescribed by UL Standards for the
Trace Engineering PS Series Inverter/Chargers for use in residential and commercial applications. This
manual specifically covers products with the revision 5.* (* refers to all revisions from 5.0 to 5.9) software.
GENERAL PRECAUTIONS
1. Before using the PS Series Inverter/Charger, read all instructions and cautionary markings on:
(a) the inverter/charger;
(b) the batteries and;
(c) all appropriate sections of this manual.
2. CAUTION - To reduce risk of injury, charge only deep-cycle lead acid, lead antimony, lead calcium,
gel cell, absorbed glass mat, or NiCad/NiFe type rechargeable batteries. Other types of batteries may
burst, causing personal injury and damage.
3. Do not expose inverter/charger to rain, snow or liquids of any type. The inverter is designed for indoor
mounting only. Protect the inverter from splashing if used in vehicle applications.
4. Use of an attachment not recommended or sold by Trace Engineering for the PS Series
Inverter/Charger may result in a risk of fire, electric shock, or injury to persons.
5. Do not disassemble the inverter/charger. Take it to a qualified service center when service or repair is
required. Incorrect re-assembly may result in a risk of electric shock or fire.
6. To reduce risk of electric shock, disconnect all wiring before attempting any maintenance or cleaning.
Turning off the inverter will not reduce this risk. Solar modules produce power when exposed to light.
Cover them with opaque material before servicing any connected equipment.
7. WARNING – RISK OF EXPLOSIVE GASSES
(a) WORKING IN VICINITY OF A LEAD ACID BATTERY IS DANGEROUS. BATTERIES
GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION. FOR THIS
REASON, IT IS OF UTMOST IMPORTANCE THAT EACH TIME BEFORE SERVICING
EQUIPMENT IN THE VICINITY OF THE BATTERY, YOU READ THIS MANUAL AND FOLLOW
THE INSTRUCTIONS EXACTLY.
(b) To reduce risk of battery explosion, follow these instructions and those published by the battery
manufacturer and manufacturer of any equipment you intend to use in the vicinity of the battery.
Review cautionary markings on these products and on engine.
SPECIAL NOTICES
1. Tools required to make AC and DC wiring connections: Wire strippers; 1/2" (13MM) open-end or
socket wrench; Phillips #2 screwdriver; flat blade 1/4" (6MM) screwdriver.
2. No terminals or lugs are required for hook-up of the AC wiring. AC wiring must be copper wire and
rated for 75°C or higher. The maximum wire size for the AC terminals is #6 AWG (4.11 mm diameter).
Battery cables must be rated for 75°C or higher. Crimped and sealed copper ring terminal lugs with a
5/16 hole should be used to connect the battery cables to the DC terminals of the inverter/charger.
Soldered cable lugs are also acceptable.
3. Torque all AC wiring connections to 20 inch-pounds. Torque all DC cable connections to 10-15 foot-
pounds. Be extra cautious to reduce the risk of dropping a metal tool onto batteries. It could short-
circuit the batteries or other electrical parts resulting in sparks that could cause an explosion.
4. This inverter/charger is intended to be used with a battery supply with a nominal voltage that matches
the last two digits of the model number, e.g. 12-Volt with a PS2512.
5. For instructions on mounting, see the MOUNTING section on page 18 of this manual.

IMPORTANT SAFETY INSTRUCTIONS
Page
4Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
6. NOTE: Do not use the keyhole mounting slots for permanent installations. For battery installation and
maintenance read the battery manufacturer's installation and maintenance instructions prior to
operating.
7. No AC or DC disconnects are provided as an integral part of this inverter. Both AC and DC
disconnects must be provided as part of the system installation. Refer to the INSTALLATION section
beginning on page 17 for more information.
8. No overcurrent protection for the battery supply is provided as an integral part of this inverter.
Overcurrent protection of the battery cables must be provided as part of the system installation. Refer
to the INSTALLATION section beginning on page 17 and the DC DISCONNECT AND
OVERCURRENT PROTECTION section on page 21 for more information.
9. No over current protection for the AC output wiring is provided as an integral part of this inverter.
Overcurrent protection of the AC output wiring must be provided as part of the system installation.
Refer to the INSTALLATION section beginning on page 17 and the AC WIRING section on page 18
for more information.
10. The AC output neutral conductor and DC negative conductors are not connected (bonded) to the
inverter chassis. Both the input and output conductors are isolated from the enclosure and each
other. System grounding, if required by sections 690-40, and 690-42 of the National Electric Code,
ANSI/NFPA 70-1996, is the responsibility of the system installer. All installations must comply with
local and national electrical codes and standards.
11. GROUNDING INSTRUCTIONS - This inverter/battery charger should be connected to a grounded,
permanent wiring system. For most installations, the negative battery conductor should be bonded to
the grounding system at one (and only one point) in the system. All installations should comply with
national and local codes and ordinances. Refer to the SYSTEM GROUNDING section on page 24 for
more information.
PERSONAL PRECAUTIONS
1. Someone should be within range of your voice or close enough to come to your aid when you work
near batteries.
2. Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing, or eyes.
3. Wear complete eye protection and clothing protection. Avoid touching eyes while working near
batteries. Wash your hands when done.
4. If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye,
immediately flood eye with running cool water for at least 15 minutes and get medical attention
immediately.
(a) Baking soda neutralizes lead acid battery electrolyte.
(b) Vinegar neutralizes spilled NiCad and NiFe battery electrolyte.
(c) Keep a supply on hand in the area of the batteries.
5. NEVER smoke or allow a spark or flame in vicinity of a battery or generator.
6. Be extra cautious to reduce the risk of dropping a metal tool onto batteries. It could short-circuit the
batteries or other electrical parts that may result in a spark which could cause an explosion.
7. Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a
battery. A battery can produce a short-circuit current high enough to weld a ring or the like to metal,
causing severe burns.
8. NEVER charge a frozen battery.
9. If necessary to remove the battery, make sure all accessories are off. Then, remove the grounded
terminal from the battery first.
10. If a remote or automatic generator start system is used, disable the automatic starting circuit and/or
disconnect the generator from its starting battery while performing maintenance to prevent accidental
starting.

INTRODUCTION
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page
5
INTRODUCTION
Congratulations! You are the proud owner of the finest inverter on the market today - and one very
complex piece of equipment. The Trace Engineering PS Series Inverter/Charger has many features and
capabilities previously either non-existent, or found only in separate products.
With proper installation, the inverter will operate satisfactorily for many applications straight out of the box
using the factory default settings. To fully utilize the inverter's generator inter-active, or utility inter-active
capabilities, it is necessary to understand the way the inverter operates and then tailor its operation via
the SWRC and the user and setup menu systems. This manual will provide the necessary information.
However, it is recommended that you consult with your authorized dealer to ensure correct installation
and maximum utilization of the numerous features of this product. If you do not understand any aspect of
the installation, contact your authorized dealer/installer for assistance.
If you intend to operate the inverter in a utility inter-active mode in which power will be sold to the utility,
you must contact the local utility office and get their approval. The utility may require additional
information that may not be included in this manual. Please contact your Trace Engineering
dealer/installer for assistance.
This manual is specific to models designed for use in Alternative Energy or Back-Up Power systems in
permanent structures, such as homes and commercial buildings. As a minimum, you should read the
sections of the manual that relate to your type of installation. The MENU SYSTEM section, beginning on
page 29, explains how to make changes to the inverter’s user/setup menus. The OPERATION section,
beginning on page 55, explains how the inverter works in each of its different modes. Focus on the
Operating Modes that relate best to your type of installation and make the appropriate selections and
adjustments. Installation diagrams are provided for many of the various applications. This menu system
provides control of the inverter, allows features to be enabled, and allows setting of operating parameters.
This is a long manual and much of it is technical. Throughout the manual terms may be used that are
unfamiliar, see the INVERTER/CHARGER TERMINOLOGY glossary on page 114 for clarification. If you
are an insomniac, properly used, this manual is guaranteed to provide several good nights of sleep.
This manual is specific to REVISION 5* PS AE software. Using the optional SWRC Remote Control,
you can verify what revision software your inverter is using by selecting third menu item under the TRACE
ENGINEERING (3) menu heading.
Note: * refers to all revisions from 5.0 to 5.9
Before beginning -
•Unpack the inverter/charger and verify that you have the correct inverter.
•Record your model number and serial number below for future reference
•Verify that you have everything listed on the Packaging Checklist sheet included in your box. If any
items are missing, please call Customer Service at [phone].
•Complete the warranty card and mail it to Trace Engineering within 10 days from the date of purchase
Keep your bill of sale as proof of purchase, should any difficulties arise concerning the registration of
the warranty card.
•Keep the original carton and packing materials It is the best way to keep the inverter safe if it needs to
be moved.
•Read this manual and enjoy your inverter/charger!
Model Number: _________________________________
Serial Number: __________________________________
Check out our web site at www.traceengineering.com for more information and answers to your FAQ’s

INTRODUCTION
Page
6Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999

CONTROLS, INDICATORS AND COMPONENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page 7
UNIT IDENTIFICATION
This section describes the marking and location of the model and serial number for the PS Series
Inverter/Chargers. Use this section to determine the type and model of your inverter/charger. The unit
Identification Label on the left side panel of the inverter/charger will show the model number, serial
number, DC charging current (maximum and default setting), AC voltage and frequency, configuration,
and date of manufacture.
Note: Ensure you have entered your serial number and model number on page 5for future reference.
Figure 1, Identification Label
DC Input Voltage
Operating Range
Model Number
DC Charging Amps
Configuration
Product Code
and Serial Number
Quarter and Year of
Manufacture
Certification Label

CONTROLS, INDICATORS AND COMPONENTS
Page
8Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
MODEL NUMBER
The model Number of your inverter determines the different features your unit may have. Consider the
following unit with a PS2512 model number:
PS 25 12 *
Model Power Nominal
DC Voltage AC Voltage/Options
Model: The first letter(s) indicate the model, in this case the PS Series.
Power: The first and second positions in the Model Number indicate the continuous AC power output in
hundreds of VA (Volt-Amps). Power levels available start at 1800 up to 2500 Volt-Amps with different DC
voltages. In the example above, 25 would stand for a 2500 VA (2.5 kVA) continuous-output inverter.
DC Voltage (Input and Output): The number (12) following the Power rating indicates the nominal
battery voltage this inverter/charger requires. The inverter/charger uses this battery voltage to convert to
an AC voltage output, and charge the batteries that are connected when powered by the same AC
voltage. The number (24) indicates a 24v inverter/charger
AC voltage/Options: The letter(s) following the DC Voltage rating indicate the particular configuration or
particular option (s) this inverter/charger is specifically designed to provide. See the SPECIFICATIONS
AND FEATURES section on page 117 for the different voltage and frequency models available.
Configuration:
AE: These models are designed for use in Alternative Energy or Back-Up Power systems in permanent
structures such as homes and commercial buildings. These units are used where the neutral is required
to be “polarized” (or connected) permanently to the safety ground at the AC panel.
MOBILE: These models are designed for use in mobile (RV/Marine) applications. They feature 120 VAC,
60 Hz output and employ automatic ground-to-neutral switching which “polarizes” the inverter’s AC output
when operating in Inverter mode and allows the external AC source to “polarize” the neutral when the
inverter is in Charge mode.
CERTIFICATION
Figure 2, Certification Label
The 120 VAC/60 Hertz models of the PS Series Inverter/Chargers (AE Configured) are Listed to UL
Standard 1741, Power Conditioning Units for use in Residential and Commercial Photovoltaic Power
Systems. This label is your guarantee that this inverter/charger has been tested by UL to nationally
recognized Safety Standards and found to be free from reasonably foreseeable risk of fire, electric shock
and related hazards. These units are also Listed to CAN/CSA-22.2 No. 107.1-M91, which means these
models have been evaluated to Canadian safety requirements, which may be somewhat different from
U.S. safety requirements.
This inverter/charger is intended to be installed in a residential or commercial application. This unit should
not be installed in an application for which it is not listed (i.e. Land Vehicles or Marine Craft). The inverter
may not be damaged; however, it would not comply with safety code requirements and may cause other
problems. .

CONTROLS, INDICATORS AND COMPONENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page 9
CONTROLS, INDICATORS AND COMPONENTS
Shown below are the controls and indicators on the PS Series Inverter/Charger. They enable you to
control and monitor the operating mode and system status of your inverter/charger. The controls on the
PS Series Inverter/Chargers are very straightforward. They feature a momentary On/Off Power switch, an
inverting/charger circuit breaker, four LED status indicators, a two-position switch for determining
maximum AC input current level and connecting ports for other optional accessories.
The figure below shows the location of the different controls and the Status Indicators.
Figure 3, Inverter Controls and Indicators
ON/OFF POWER SWITCH
This switch allows turning the inverter ON and OFF, enabling the SEARCH mode or selecting the charger
only mode CHG. The on/off button also resets the inverter in the event it shuts down completely due to a
fault condition. The inverter always starts in the OFF position when powered up. Each push changes the
mode you are in, continue pressing the ON/OFF power switch until you have your desired selection.
Monitor the INVERT (yellow) LED to determine what mode you have selected.
•OFF: Disables the inverter. This is the default position of the inverter upon power-up. When the
OFF position is selected, no power will be provided to the AC loads even if an AC source is
available. The red ERROR LED will be on, this indicates that there is no AC available on the output
and the INVERT (yellow) LED will be off.
•SRCH: Enables the automatic load search mode control system. This system will turn on the
inverter if a large enough load is connected. If not enough AC loads are detected, the INVERT
(yellow) LED will blink slowly (one blink/sec). No power will be provided to the AC loads, even if an
AC source is available. The sensitivity threshold is defaulted to 48 watts.
•ON: Allows the inverter to provide AC voltage to the output and energize the AC loads either from the
battery or from any “synchronized” AC source available on the input. The INVERT (yellow) LED will be on.
•CHG: Allows the inverter to operate only as a battery charger. AC power will be available to the AC
loads only if an AC source is available and “synchronized”. This mode is used to prevent discharge of
the batteries by the AC loads when a utility outage occurs. The INVERT (yellow) LED will double blink
each second (double blink/sec) to indicate that you are in CHG mode. This mode is only available
when the SET GRID USAGE menu item is in the FLT mode under the INVERTER SETUP (9) menu
heading. When a different mode is selected, this position will be locked out and it will be necessary to
use the SET POINTS buttons on the optional SWRC remote to move the cursor. Selecting the CHG
mode disables the Automatic Generator Start features.
SET INVERTER
OFF SRCH ON CHG SET INVERTER OFF SRCH ON CHG SET INVERTER OFF SRCH ON CHG SET INVERTER OFF SRCH ON CHG
‘Maximum AC
Amps In’
Switch and LED
Status Indicators
On/Off Power
Switch
AC SIDE
Branch Circuit
Breakers
(Optional)
DC SIDE
AC Circuit Board
(Inside, under
Access Panel)
FRONT SIDE
Inverting/Charger
AC Circuit Breaker.

CONTROLS, INDICATORS AND COMPONENTS
Page
10 Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
INVERTER/CHARGER CIRCUIT BREAKER
This circuit breaker protects the unit’s internal wiring while the unit is inverting or charging. It is not used
for the pass-through current, which is rated for 50 amps AC. This is not a branch circuit rated breaker,
output breakers are required. Press the breaker to reset.
CIRCUIT BREAKERS
An optional, field installable, Breaker Kit can be ordered which will allow direct hook-up up of up to two
circuits without the use of a separate sub-panel. The Breaker Kit is available with a single 15 or 20 amp
branch circuit rated breaker.
‘MAXIMUM AC AMPS IN’ SWITCH
This switch determines the AC current level at which the inverter begins to back-off the battery charger or
operates in parallel to reduce the load on a generator. This prevents the overloading of the AC source
and prevents nuisance tripping of the AC source circuit breakers. Typically, this is set to the size of the
AC source's (Utility Power or Generator) circuit breaker feeding the inverter or the maximum output
amperage ability of the AC source.
The switch can be switched to the AC1 side to limit the input current to 50 Amps or to the AC2 side to limit
the input current to 30 amps.
The maximum AC input amp size can be adjusted to different settings in the SET GRID (AC1) AMPS AC
and the SET GEN (AC2) AMPS AC menu items using the optional SWRC remote.
Figure 4, ‘Maximum AC Amps In’ Switch And LED Status Indicators
LED STATUS INDICATORS
All PS Series Inverter/Chargers feature four LED status indicators - located on the unit’s front side panel -
that will enable you to monitor the operating mode and system status of your inverter/charger by lighting
one or more of the LED’s. The different colored LED’s will light based on the condition or operating mode
of the inverter/charger. Refer to the LED colors below to determine you unit’s status.
GREEN = AC IN
ON: An AC source has been applied to the AC input terminals of the inverter. When an AC source is
connected to the input terminals the green LED indicator will come on. After a delay period has passed
and once synchronized, the inverter will close an internal relay to connect the AC source to the AC loads
and the inverter will begin to charge the battery and the orange LED indicator will turn solid.
‘Maximum AC Amps In’
switch
LED Status Indicators

CONTROLS, INDICATORS AND COMPONENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page 11
RED = ERROR
ON: Indicates that there is no AC voltage available on the output. The red error LED is used in conjunction
with the yellow (invert) LED to determine the operating mode of the inverter. If the red LED is on and the
yellow (invert) LED is off, then the inverter is in standby (DC power connected but not turned on) and is
ready to turn on. With the red LED on and the yellow LED blinking twice a second with a one second pause,
then the inverter is in the CHG (charge only) mode and waiting for AC to be connected to the input. If the
red LED is on and the yellow (invert) LED is flashing rapidly (4 times/second), this indicates that an error
condition exists. Refer to the INVERT (yellow) LED for more information on error causes.
YELLOW = INVERT
OFF – INVERTER/CHARGER IS OFF: The inverter is off and not operational. This is the default position
of the inverter upon power-up. No AC output is available.
ON – INVERTER/CHARGER ON: The inverter is operational and AC output is available. Inverter is
providing AC power from the batteries or the input AC source is providing pass-thru power to the output.
ONE BLINK/SEC – SEARCH: The yellow LED will blink once each second to indicate the inverter is in
search mode and is looking for an AC load greater than the SEARCH WATTS setting (default = 16 watts).
DOUBLE BLINK/SEC – CHARGE ONLY MODE (CHG): The yellow LED will double blink then pause for
a second to indicate that the unit is in Charge Onlymode.
RAPID BLINK (4/SEC) – ERROR MODE: The yellow LED will blink rapidly to indicate that an operating
error has occurred. This can be caused by over-load or over-current, over-temperature (transformer or
heatsink), high or low battery voltage, AC source wired to the output, or an external (stacked) error. When
the inverter senses one of these situations, it may protect itself by disconnecting from the loads. There
are also advisory and numerous generator-related errors that will not disconnect the AC loads. Refer to
each error cause below to help determine your particular error cause.
ERROR CAUSES (AC OUTPUT WILL BE DISCONNECTED):
If an over-current condition exists, the inverter will shutdown and must be reset with the power button. If
the error condition is based on over-temperature (transformer or heatsink), or high or low battery voltage
the error protection circuitry resets automatically.
Low Battery voltage:Your battery voltage is below the LOW BATTERY CUT OUT (LBCO) VDC setting
and the inverter has shut off to prevent over-discharge of the battery. Allow the battery to recharge or
connect to an AC source such as a back-up generator. The inverter will reset when the battery exceeds
the LBCO setting.
Low inverter voltage: Your inverter/charger monitors the minimum AC voltage level of the AC output.
This assures a continuous supply of quality Alternating Current to your electrical loads. The inverter AC
output voltage level is determined by the SET INPUT LOWER LIMIT VAC setting. If the AC voltage falls
below this setting continuously for 32 seconds the inverter disconnects from the loads and turns on the
error LED. The cause for this error could be high battery voltage or an excessively large load.
High Battery voltage:The inverter turns off due to a high battery voltage condition determined by the
HBCO (HIGH BATTERY CUT-OUT)setting. This can be caused by the solar array or other charging
source not being regulated. Check the controller for proper operation. Some controllers have a “equalize”
setting which over-rides the normal operation, allowing the battery voltage to be unregulated. Return the
controller to the “normal” setting and check for proper operation. If you are using NiCad type batteries,
you will need to increase the HBCO setting. The inverter will automatically reset once the battery voltage
has dropped 1.5 volts below the HBCO setting.
Over-temperature (Transformer or Heatsink) :The transformer or power transistors have exceeded
their safe operating temperature and the inverter has turned off. When operating as a battery charger, the
inverter will reduce its charging rate to prevent overheating. As an inverter, overheating can be caused by
attempting to operate too large of a load for too long, a failure of the inverter cooling fans, or that the air
flow into or out of the inverter is being blocked. The inverter will automatically reset once it has cooled.
While the inverter has shut down, AC power from any AC source may not continue to pass through the
inverter to power AC loads. Any power management provided by the inverter will not be able to occur
while the inverter is off.

CONTROLS, INDICATORS AND COMPONENTS
Page
12 Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
Over-current:The load requirement has exceeded the maximum output AC amps. To clear this fault,
disconnect the loads and restart the inverter. To restart the inverter after an overcurrent fault condition,
press the On/Off Power Switch only one time. Reconnect the loads one at a time to find the load or
combination of loads that caused the problem. If the inverter will not restart with all the AC loads
disconnected, remove all AC wiring from the terminal block and try to restart again. If it restarts, the
problem is with the wiring. If it does not restart, refer to the other error causes to determine the error.
AC source wired to output:Reports that an AC voltage source was connected directly to the AC output.
This can be caused by improper wiring or incorrect installation of the inverter. This condition is much
worse than a short circuit and may cause damage to the inverter. Disconnect all wiring from the AC input
and output to find the cause. After the cause has been found and corrected, you can restart the inverter
by selecting OFF and then ON or SRCH with the On/Off Power Switch
External error (stacked): A problem has occurred with the series interface cable or one of the inverters
operated in series. Check the cable for damage and replace it to see if the problem is corrected. Also,
check the connecting input and output AC wiring.
ERROR CAUSES (WILL NOT CAUSE AC OUTPUT TO BE DISCONNECTED).
Low AC input voltage: Your inverter/charger monitors single cycle voltage problems from the AC
source. The low AC voltage level is determined by the SET INPUT LOWER LIMIT VAC setting. If the AC
voltage falls below this setting the INVERT (yellow) LED will flash rapidly and remain on for 3 minutes.
This error is an advisory error only and will not drop the AC input.
High AC input voltage: Your inverter/charger monitors single cycle voltage problems from the AC
source. The high AC voltage level is determined by the SET INPUT UPPER LIMIT VAC setting. If the AC
voltage rises above this setting the INVERT (yellow) LED will flash rapidly and remain on for 3 minutes.
This error is an advisory error only and will not drop the AC input.
Generator failed to start:Indicates that the automatic generator start system was not able to
successfully start the generator. The system completes five start cycles and requires that the generator
operate for a minimum of 5 minutes before the starting attempts counter is cleared. To manually clear this
error, press the green GEN MENU button on the SWRC to access the SET GENERATOR menu item,
then select OFF and then AUTO or ON.
Generator stopped due to V/F:Indicates that the automatic generator start system was not able to
successfully connect to the generator after it was running. If the generator runs for 10 minutes without
operating in the AC voltage and frequency tolerance windows, then the automatic start system stops the
generator and indicates an error condition. To manually clear this error, press the green GEN MENU button
on the SWRC to access the SET GENERATOR menu item, then select OFF and then AUTO or ON.
Gen Max Run Time: An ERROR LED will turn on if the generator run time has exceeded the SET
MAXIMUM RUN TIME setting. This setting is intended to indicate excessive generator operation because
the system has not been able to fully charge the battery. Operating heavy loads while charging, an
unstable generator or even low electrolyte levels in the battery can cause this. If the default value results
in repeated error conditions, then increasing the setting may be necessary for your application. This may
occur with systems that have very large batteries that require long charge periods or systems with small
generators that have limited battery-charging ability. This ERROR is an advisory indication only and will
not stop the generator. You can reset this ERROR LED by selecting OFF and then ON from the SET
GENERATOR menu item, accessed by pressing the green GEN MENU button on the SWRC.
Gen speed error:Indicates that the automatic generator start system has detected that the generator
frequency is not well adjusted. This error condition will cause the red ERROR LED to illuminate, but will
not cause the automatic generator start system to shut down. If the inverter can not synchronize to the
generator after a 10-minute period, then the GEN SPEED ERROR condition will be reached.
ORANGE = CHARGE
ON: This orange LED will be lighted when the unit is charging. The inverter is charging at a constant
current, causing battery voltage to rise near the BULK VOLTS DC setting (default = 14.4 VDC). Once at
this level, the current will taper off until the battery charger has maintained the batteries near the BULK
VOLTS DC setting for the time period of the ABSORPTION TIME setting, at which time it then regulates
the charging process at the FLOAT VOLTS DC setting.

CONTROLS, INDICATORS AND COMPONENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page 13
AC SIDE
Figure 5, PS Series AC Side
AC CIRCUIT BOARD
By removing the Access Panel, you will be able to gain access to the AC circuit board, which includes the
AC terminal block and four RJ11 jacks for connecting specific optional components.
Figure 6, AC Circuit Board
AUX - RJ11 connection jack for the optional plug-in Auxiliary Relay Module. The Auxiliary Relay Module
consists of two voltage-controlled relays and is used to simplify installations that have battery voltage
related tasks to perform. The relays are single pole double throw, five amp relays. Both the normally
closed and normally open contacts are available for each relay. The operation of each relay is individually
controlled and adjustable with a SWRC via the user menu. The auxiliary relays on the AUXILIARY
RELAY MODULE operate independently of the inverter or charger.
AC Ground
Terminal
(located inside)
Accessory
knockout
AC knockouts
AC terminal block
(located inside)
AC circuit board
(located inside)
ACCESS
PANEL
AC TERMINAL
BLOCK
RC8AUX GEN BTS

CONTROLS, INDICATORS AND COMPONENTS
Page
14 Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
GEN - RJ11 connection jack for the optional plug-in Generator Relay Module. The Generator Relay
Module consists of signal relays and allows connection and automatic control of “two-wire” type
generators. The relays are single pole double throw, five amp relays. Both the normally closed and
normally open contacts are available for each relay. The operation of each relay is controlled and
adjustable with a SWRC via the user menu.
RC8 - RJ11 connection jack for the optional plug-in RC8 remote. Allows remote On/Off control of the
inverter at a distance of up to 50 (RC8/50) or 100 (RC8/100) feet away, functionally identical to the On/Off
Power Switch on the inverter.
BTS - RJ11 connection jack for the plug-in external Battery Temperature Sensor (BTS). The BTS
automatically fine-tunes the charging process of the battery charger in relation to temperature. If the
temperature sensor is NOT installed and if the battery is subjected to large temperature variations, a
shorter battery life cycle may be expected.
AC TERMINAL BLOCK
Figure 7, AC Terminal Block
A five pole terminal block is provided for hardwiring the inverter’s AC output the AC input connections. It
is located on the left-hand side of the inverter, enclosed under the access panel. The terminal block will
accept wire up to #6 AWG.
Depending on your unit’s configuration (See the UNIT IDENTIFICATION section on page 7to determine
your unit’s particular configuration) the AC input and output neutrals are configured differently.
This manual is specific to models designed for use in Alternative Energy or Back-Up Power systems in
permanent structures, such as homes and commercial buildings. All of the PS Series units marked with the
Alternative Energy configuration are designed with the three NEUTRAL terminals being common to each
other and can be used in any combination or order. It is often simpler to only connect one AC neutral wire to
the inverter and make the other neutral connections at a central point such as at an AC load center, etc. The
additional AC NEUTRAL OUTPUT is provided for use when installing the optional Branch Breaker Kit.
AC GROUND TERMINAL
Figure 8, AC Ground Terminal
The AC Safety Ground Terminal - assessable through the AC access
cover - is used to connect the exposed chassis of the inverter to the
AC grounding system. This terminal accepts wires from #14 AWG to
#2 AWG.
AC HOT OUTPUT
AC NEUTRAL OUTPUT
AC NEUTRAL INPUT
AC HOT INPUT
AC NEUTRAL OUTPUT

CONTROLS, INDICATORS AND COMPONENTS
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page 15
DC SIDE
Figure 9, PS Series DC Side
STACKING PORT
The stacking port allows two PS Series Inverter/Chargers (AE configuration models only) to be used in
the same system. The inverters can be used in a “SERIES” configuration to operate 240 VAC loads and
to connect to 120/240 VAC power systems. A series stacking interface cable (SWI) is required to connect
the series stacking ports of the inverters. This port is also used to connect two units in a “PARALLEL”
configuration. The parallel stacking interface cable (SWI/PAR) allows two inverters to be connected to
provide twice the continuous and surge capability at the same AC voltage. See the USING MULTIPLE
INVERTERS section on page 92 for more information.
REMOTE PORT
The PS Series can be controlled remotely from the unit by plugging in a SWRC remote control or SWCA
communications adapter. See the OPTIONS section starting on page 127 for a complete description of
the SWRC and SWCA.
BATTERY POSITIVE & NEGATIVE TERMINALS
These terminals are where you connect your battery cables. WARNING: Ensure your battery/cable
polarity is correct, this inverter is not reverse polarity protected. If the positive terminal of the battery
is connected to the negative terminal of the inverter and vice versa, the result will be instantaneous failure
of nearly every power transistors. Color-code the cables with colored tape or heat shrink tubing [the
standard is red for positive (+) and black for negative (-)] and double-check the polarity with a voltmeter
before making the battery connections.
DC EQUIPMENT/CHASSIS GROUND TERMINAL
This connection is used to connect the exposed chassis of the inverter to the DC grounding system. The
terminal accepts wires from #14 AWG to #2 AWG.
Positive
Battery Cable
Hook-Up
Negative
Battery Cable
Hook-Up
DC Ground
Connection
Stacking Port
Remote Port
SWRC or SWCA

CONTROLS, INDICATORS AND COMPONENTS
Page
16 Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999

INSTALLATION
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999 Page
17
INSTALLATION
This section is very important, since it tells you how to properly install your PS Series Inverter/Charger. It
becomes very frustrating when your inverter system does not perform properly, simply because care was
not taken during installation. Please read this entire section carefully. You will save time and avoid
common mistakes.
This section also describes the requirements and recommendations for installing the PS Series
Inverter/Charger. In the U.S., the National Electrical Code (NEC) defines the standards for both the AC
and DC wiring in residential and commercial applications. It will list the requirement for wire sizes,
overcurrent protection and installation methods and requirements. There are still many other variables not
covered by the NEC. Most are determined by the level of automatic operation, the amount of external AC
and DC power to be controlled and the loads to be operated.
The NEC standards and regulations are described here in general for your convenience, and are not
represented as comprehensive or complete. For comprehensive and complete official standards and
regulations, write the addresses listed below:
NFPA - National Fire Protection Association
National Electrical Code Handbook
1 Batterymarch Park,
PO Box 9101
Quincy, MA 02269-9101
617-770-3000.
Before beginning the installation of the PS Series Inverter/Charger, read all instructions. Disconnect all
sources of AC and DC power to prevent accidental shock. Disable and secure all AC and DC disconnect
devices and automatic generator starting devices.
All installations should meet local codes and standards and be performed by qualified personnel
such as a licensed electrician. Although the DC electrical system may be “low voltage”, significant
hazards may be present, particularly from short circuits of the battery system. Inverter systems by their
nature involve power from multiple sources (inverter, generator, utility, batteries, solar arrays etc.) that
add hazards and complexity that can be very challenging.
After you have finished installing your unit, continue with the FUNCTIONAL TEST section on page 27. This
functional test should be completed prior to configuring your unit’s Menu System for your specific operation.
LOCATION
Inverters are sophisticated electronic devices and should be treated accordingly. Treat the inverter as you
would any fine piece of electronic equipment. When selecting the location to install the inverter, don't think of
it in the same terms as the other interfacing equipment, e.g. batteries, diesel generators, motor generators,
washing machines etc. This is a highly complex microprocessor controlled device. There are nearly 500,000
silicon junctions in its output devices and integrated circuits. The crystal oscillator runs at 4 megahertz. The
drive circuitry timing is accurate to a thousandth of a second. Genetically speaking, it is a cousin to stereo
equipment, television sets or computers. The use of conformal-coated circuit boards, plated copper bus
bars, powder coated metal components, and stainless steel fasteners improves tolerance to hostile
environments. However, in a corrosive or condensing environment (one in which humidity and/or
temperature change cause water to form on components) all the ingredients for electrolysis are present -
water, electricity and metals. In a corrosive or condensing environment, the life expectancy of the
inverter is indeterminate and the warranty is voided if corrosion is the cause of failure.
Caution: It is in your best interests to install the inverter in a dry, protected location away from sources of
fluctuating or extreme temperatures and moisture. Exposure to saltwater is particularly destructive and
potentially hazardous.
Locate the inverter as close to the batteries as possible in order to keep the battery cable length short.
However, do not locate the inverter above the batteries or in the same compartment as vented batteries.
Batteries generate hydrogen sulfide gas, which is very corrosive to electronic equipment and everything
else. They also generate hydrogen and oxygen. If accumulated, an arc caused by the connecting of
battery cables or the switching of a relay could ignite this mixture. Mounting the inverter in a ventilated
enclosure with sealed batteries is acceptable.

INSTALLATION
Page
18 Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: [phone]
Fax: [phone]
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
This inverter can create RFI (Radio Frequency Interference). Keep this in mind when determining the
placement of the inverter. You should locate the inverter as far away as possible from any electronic
devices that may be susceptible to RFI.
MOUNTING
UL Standard 1741 requires that the inverter be mounted on a vertical surface (on a wall) and that the
keyhole slots not be used as the only method of mounting. The purpose of the wall mounting requirement
is to orient the inverter so that its bottom cover, which has no holes, will not allow burning material to be
ejected in case of an internal fire. Use 1/4” minimum diameter bolts for mounting. The mounting must be
capable of supporting twice the weight of the inverter in order to comply with UL 1741.
VENTILATION
Installation of the inverter in a properly ventilated area/enclosure is necessary for efficient operation of the
unit. The inverter’s thermal shutdown point will be reached sooner than normal in a poorly ventilated
environment and will result in a lower peak power output, reduced surge capability, and potentially shorter
inverter life. Note: Do not operate the inverter in a closed-in area or restrict ventilation in any way.
Testing has shown that the volume of the area/enclosure is not as important as the overall ventilation. A
minimum airspace clearance of 1-½ inches around the top and 3 inches of clearance at the right side of
the inverter will provide adequate ventilation. Because the bottom of the PS Series chassis is not vented,
clearance between the enclosure and the bottom of the inverter is not critical. A fresh air intake port
should be provided directly to the right side and an exhaust port on the top side will allow cool outside air
to flow through the inverter and back out of the enclosure.
Figure 10, Airflow Intake Location
AC WIRING
This section describes AC wiring requirements and recommendations; including AC connections; wire
sizing; overcurrent devices; GFCI’s; external relays; hookup procedure; and neutral-to-ground switching.
Your local electrical code and the National Electrical Code (NEC) define the standards for AC installation
wiring, but there are still many installation variables to be considered. Consult the local code and the NEC
for the proper wire sizes, connectors and conduit. All installations should meet all local codes and
standards and be performed by qualified personnel such as a licensed electrician.
AC WIRE CONNECTIONS
IMPORTANT PRECAUTIONS - The AC OUTPUT of the inverter must at no time be connected
directly to utility power or a generator. This condition can be far worse than a short circuit. If the
inverter survives this condition, it will shut down until corrections are made.
A five position terminal block is provided to make the AC connections. The terminal block is located on
the left-hand side of the inverter, enclosed under an access panel (see page 9for exact location). The
terminal block is used to hardwire all AC connections.
AIR FLOW