nvent SPECTRACOOL S0603 6G Series User manual

© 2023 nVent
Rev. B P/N 89217666 89217666
SPECTRACOOL
Slim Fit Air ConditionerS
All modelS
INSTRUCTION MANUAL

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TABLE OF CONTENTS
nVent Cooling Sales and Service Contacts.......................................................................................................................................................... 4
Warranty and Return Policy ................................................................................................................................................................................... 4
CE Declaration of Conformity................................................................................................................................................................................ 5
Receiving The Air Conditioner ............................................................................................................................................................................... 9
Handling and Testing The Air Conditioner ........................................................................................................................................................... 9
PHASE MONITOR (460v Only)........................................................................................................................................................... 9
How to Read Model Numbers ............................................................................................................................................................................... 9
General Safety Information.................................................................................................................................................................................. 10
General Technical Information ............................................................................................................................................................................ 10
Sequence of Operation................................................................................................................................................................................. 10
Cooling................................................................................................................................................................................................... 10
Component Operation.................................................................................................................................................................................. 10
Smart Controller (General Alarms)...................................................................................................................................................... 10
Remote Access Control (Optional) ..................................................................................................................................................... 10
Door Switch........................................................................................................................................................................................... 10
Active Condensate Management........................................................................................................................................................ 10
Mounting ............................................................................................................................................................................................................... 11
Tools Required For Installation:................................................................................................................................................................... 11
External Mounting ........................................................................................................................................................................................ 11
Partial Recessed Mounting (Not Applicable to 300W Unit)...................................................................................................................... 11
Electronic Controlling Section ............................................................................................................................................................................. 13
Digital Thermostat Controller (optional)..................................................................................................................................................... 13
Overview........................................................................................................................................................................................................ 13
Energizing The Controller............................................................................................................................................................................. 13
Controller Status Indication......................................................................................................................................................................... 14
Keypad ................................................................................................................................................................................................... 14
Main eld............................................................................................................................................................................................... 14
Icons ...................................................................................................................................................................................................... 14
Displaying And Changing Program Settings .............................................................................................................................................. 16
To View Or Access The Settings ......................................................................................................................................................... 16
To Change A Parameter Setting.......................................................................................................................................................... 16
Models With °C Controllers.......................................................................................................................................................................... 17
Table 1: Heat/Cool Operating Parameters ......................................................................................................................................... 17
Table 2: Alarm Parameters (°C)........................................................................................................................................................... 17
Models With °F Controllers.......................................................................................................................................................................... 17
Table 3: Heat/Cool Operating Parameters ......................................................................................................................................... 17
Table 4: Alarm Parameters (°F) ........................................................................................................................................................... 17
Real-Time-Clock Setting....................................................................................................................................................................... 18
View Alarms .......................................................................................................................................................................................... 18
View The Alarms In The Alarm History Folder ................................................................................................................................... 18
To Reset The Alarms In Alarm History Folder.................................................................................................................................... 19
To Reset Parameters To Factory Default............................................................................................................................................ 19
Displaying Temperature Data On Screen.................................................................................................................................................... 20
Compressor Restart Time Delay ................................................................................................................................................................. 20
Alarm Input Contact - Door Open/Smoke Detected .................................................................................................................................. 20
Alarm Output Contact – All Alarms ............................................................................................................................................................ 20
Primary-Secondary (Ps) Mode .................................................................................................................................................................... 21
Connecting Units Together In Primary/Secondary Mode ......................................................................................................................... 21
Figure 2: Primary-secondary network connectivity ........................................................................................................................... 21
Lead-Lag (Ll) Mode ...................................................................................................................................................................................... 23
Connecting Units Together In Lead/Lag Mode.......................................................................................................................................... 23
Figure 3: Lead-Lag network connectivity............................................................................................................................................ 23
Air Conditioner Unit Remote Communication Features............................................................................................................................ 24
Usb Communication............................................................................................................................................................................. 24
Ethernet Communication..................................................................................................................................................................... 24
Using nVent HOFFMAN Pc Interface Tool.................................................................................................................................................. 25
Usb Communication Mode.................................................................................................................................................................. 25
To View The Controller Data Information From The A/C Unit ...................................................................................................... 25
To Change The Temperature Settings To The Controller.............................................................................................................. 25
To View And Change The Ethernet Card (Rac) Information ......................................................................................................... 25
To Change The Static Network To Dynamic Network Mode ........................................................................................................ 25
Ethernet Communication Mode .......................................................................................................................................................... 26
To Monitor Multiple A/C Units In The Network ................................................................................................................................. 26
Alarm Log Accessible With Support Protocol................................................................................................................................ 26
Remote Access Control Pin-Out.......................................................................................................................................................... 27
Technical Information .......................................................................................................................................................................... 28
S06 Models 300/500W ................................................................................................................................................................................ 28
S06 Schematic 300/500W................................................................................................................................................................... 28
S06 Wire Diagram 300/500W .............................................................................................................................................................. 29
S06 Dimensional Drawings.................................................................................................................................................................. 30
300W.................................................................................................................................................................................................. 30
500W.................................................................................................................................................................................................. 30

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S06 Installation Instruction.................................................................................................................................................................. 32
S06 300W Cutout Drawing................................................................................................................................................................... 32
Surface Mount ...................................................................................................................................................................................... 32
Full Recess Mount ................................................................................................................................................................................ 32
S06 500W Cutout Drawing................................................................................................................................................................... 33
Surface Mount ...................................................................................................................................................................................... 33
Partial and Full Recess Mount............................................................................................................................................................. 33
S06 Unit Characteristics....................................................................................................................................................................... 34
S06 Components .................................................................................................................................................................................. 35
S10 Models 1000/1500W............................................................................................................................................................................ 36
S10 Schematics.................................................................................................................................................................................... 36
1000W 115V, 230V ........................................................................................................................................................................... 36
1000W 460V...................................................................................................................................................................................... 36
1500W 115V...................................................................................................................................................................................... 37
1500W 230V...................................................................................................................................................................................... 37
1500W 460V...................................................................................................................................................................................... 38
S10 Wire Diagrams............................................................................................................................................................................... 39
1000W 115V, 230V ........................................................................................................................................................................... 39
1000W 460V...................................................................................................................................................................................... 40
1500W 115V...................................................................................................................................................................................... 41
1500W 230V...................................................................................................................................................................................... 42
1500W 460V...................................................................................................................................................................................... 43
S10 Dimensional Drawing.................................................................................................................................................................... 44
1000/1500W ..................................................................................................................................................................................... 44
S10 Installation Instruction.................................................................................................................................................................. 45
S10 1000/1500W Cutout Drawing ...................................................................................................................................................... 45
Surface Mount ...................................................................................................................................................................................... 45
Partial and Full Recess Mount............................................................................................................................................................. 45
S10 Unit Characteristics (115V, 230V)................................................................................................................................................ 46
S10 Unit Characteristics (460V).......................................................................................................................................................... 47
S10 Components (1 Phase)................................................................................................................................................................. 48
S10 Components (3 pHASE) ............................................................................................................................................................... 49
S16 Models 2000/2500W............................................................................................................................................................................ 50
S16 Schematics.................................................................................................................................................................................... 50
2000W 230V...................................................................................................................................................................................... 50
2000W 460V...................................................................................................................................................................................... 50
2500W 230V...................................................................................................................................................................................... 51
2500W 460V...................................................................................................................................................................................... 51
4000W 460V...................................................................................................................................................................................... 52
S16 Wire Diagrams .............................................................................................................................................................................. 53
2000W 230V...................................................................................................................................................................................... 53
2000W 460V...................................................................................................................................................................................... 54
2500W 230V...................................................................................................................................................................................... 55
2500W 460V...................................................................................................................................................................................... 56
4000W 460V...................................................................................................................................................................................... 57
S16 Dimensional Drawing.................................................................................................................................................................... 58
2000/2500W ..................................................................................................................................................................................... 58
4000W................................................................................................................................................................................................ 59
S16 Installation Instruction.................................................................................................................................................................. 60
S16 2000/2500W Cutout Drawing ...................................................................................................................................................... 60
Surface Mount ...................................................................................................................................................................................... 60
Partial and Full Recess Mount............................................................................................................................................................. 60
S16 4000W Cutout Drawing................................................................................................................................................................. 61
Surface Mount ...................................................................................................................................................................................... 61
Partial Recess Mount ........................................................................................................................................................................... 61
S16 Unit Characteristics (230V).......................................................................................................................................................... 62
S16 Unit Characteristics (460V).......................................................................................................................................................... 63
S16 Components (230V) ..................................................................................................................................................................... 64
S16 Components (460V) ..................................................................................................................................................................... 65
Maintenance ......................................................................................................................................................................................................... 66
Compressor................................................................................................................................................................................................... 66
Inlet Air Filter (Field Installed Option) ......................................................................................................................................................... 66
How To Remove, Clean or Install an optional Inlet Air Filter..................................................................................................................... 66
Condenser and Evaporator Air Movers....................................................................................................................................................... 66
Maintenance / Inspection Recommendations................................................................................................................................... 67
Basic Air Conditioning Trouble Shooting Check List - Remote Access Control Version................................................................................ 68
Basic Air Conditioning Trouble Shooting Checklist................................................................................................................................... 69
3-Phase Basic Air Conditioning Trouble Shooting Check List - Remote Access Control Version......................................................... 70
3-Phase Symptoms and Possible Causes - Remote Access Control Version ........................................................................................ 71
F-GAS INFORMATION - S06 MODELS................................................................................................................................................................. 72
F-GAS INFORMATION - S10 MODELS................................................................................................................................................................. 72
F-GAS INFORMATION - S16 MODELS................................................................................................................................................................. 72

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NVENT COOLING SALES AND SERVICE CONTACTS
EUROPE:
Deutschland (Germany) [phone]
France [phone]
Italia (Italy) [phone]
Polska (Poland) [phone]
Россия (Russia) [phone]
Sverige (Sweden) [phone]
United Kingdom [phone]
MIDDLE EAST:
UAE [phone]
NORTH AMERICA:
México [phone]
US and Canada [phone]
SOUTH AMERICA:
Brasil (Brazil) [phone]
ASIA/SOUTH PACIFIC:
中国 (China) [phone]
India [phone]
日本 (Japan) [phone]
Singapore [phone]
Or visit nVentProtect.com
WARRANTY AND RETURN POLICY
https://hoffman.nVent.com/en/HOFFMAN/warranty-information

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CE DECLARATION OF CONFORMITY
Authorized by: 2/21/2018
Date
Subject to Change Without Notice DOC: CE-00154-C

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RECEIVING THE AIR CONDITIONER
Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents,
scratches, loose assemblies, evidence of oil, etc. Damage evident upon receipt should be noted on the freight bill.
Damage should be brought to the attention of the delivering carrier -- NOT to nVent Equipment Protection -- within
15 days of delivery. Save the carton and packing material and request an inspection. Then le a claim with the
delivering carrier.
nVent Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any
way possible.
HANDLING AND TESTING THE AIR CONDITIONER
If the air conditioner has been in a horizontal position, be certain it is placed in an upright, vertical or mounting
position for a minimum of ve (5) minutes before operating.
Do not attempt to operate the air conditioner while it is horizontal
or on its side, back or front. The refrigeration compressor is lled
with lubricating oil. This will cause permanent damage to the air
conditioner and also voids the warranty.
CAUTION
TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
Refer to the nameplate for proper electrical current requirements, and then wire the unit to a properly grounded
power supply using copper conductors only. Power supply wiring should be restrained after eld installation to
ensure no contact with internal fan. Minimum circuit ampacity should be at least 125% of the amperage shown
on the unit nameplate. No other equipment should be connected to this circuit to prevent overloading.
Electrical circuit should be fused with slow blow or heating, air conditioning and refrigeration (HACR) rated circuit
breaker. Use a higher ampere rated circuit breaker or time-delay fuse that is closest to the nominal ampere rating
of the air conditioner, or sum of the individual component ampere ratings, to protect system electrical circuits
from short circuit or overload.
PHASE MONITOR (460V ONLY)
Note Location: Rear access panel, D-shaped sight port.
Reference S10 Dimensional Drawing on page 43; S16 Dimensional Drawing,
2000/2500W on page 58; S16 Dimensional Drawing, 4000W on page 59
This product is equipped with Phase/Voltage Protection. Please verify correct phasing and voltage before
operating. Note the fans may still operate if phasing is incorrect, but the compressor will not, so the unit
will not cool. Illuminated light on Phase Monitor indicates phase is correct.
If the light is not illuminated, disconnect power from the unit and swap any two power leads at the
terminal block. This should correct the phasing. The light should now illuminate when power is reapplied.
Immediately after applying power, the evaporator blower (enclosure air) should start running. Operate the air
conditioner with the compressor running for ve (5) to ten (10) minutes. You will need to set the cooling controller
setpoint below the ambient temperature to operate the compressor.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes after the
condenser impellers start.
See Sequence of Operation on page 10 for specics on how the unit operates when powered up.
HOW TO READ MODEL NUMBERS
S10 15 2 6 G031
12345
1. Identies the type/family of air conditioner and the approximate height (i.e. S10 = Slim Fit family
about 1000mm high (10x100).
2. This is the air conditioner’s listed capacity in Watts at rated conditions. (i.e. 15=1500W (15x100) at
35/35 C)
3. 1 = 115 Volt, 2 = 230 Volt, 4 = 400/460 Volt.
4. 5 = 50 Hz only, 6 = 50/60 Hz or 60 Hz only.
5. Unique set of numbers for each air conditioner which identies the accessories on a model.

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GENERAL SAFETY INFORMATION
Please observe the following general safety instructions when assembling and operating the unit:
• Assembly,installation and servicing may only be performed by properly trained specialists.
• When transporting the enclosure with the cooling unit externally mounted, always use an additional shipping brace
to support the cooling unit.
GENERAL TECHNICAL INFORMATION
The evaporator outlet sensor monitors the enclosure return air temperature to prevent ice buildup on the
evaporator coil. If the air temperature drops below –1°C, the compressor and condenser air mover(s) shut off.
They turn back on when the temperature rises above 15°C.
The compressor and the air movers are equipped with overload protection to guard against excess current and
temperatures.
SEQUENCE OF OPERATION
The air conditioner comes standard with smart controller. During cooling modes, the evaporator fan will be
running.
COOLING
When the enclosure temperature is above the cooling setpoint, power is applied to the compressor and
condenser air mover(s).
Operating the air conditioner below the minimum ambient temperature or above the maximum
ambient temperatures indicated on the nameplate voids all warranties. DO NOT adjust the setpoint to a
temperature lower than 20°C. Doing so can increase the likelihood of frost buildup on the evaporator coil.
The moisture that the sealed enclosure air can contain is limited. If moisture ows from the drain tube
continuously this can only mean that ambient air is entering the enclosure. Be aware that frequent
opening of the enclosure’s door admits humid air that the air conditioner must then dehumidify.
COMPONENT OPERATION
NOTE: Do not reduce the time delay setting on the controller to less than 120 seconds. This
may cause the compressor to cycle too rapidly, shortening the life of the compressor.
SMART CONTROLLER (GENERAL ALARMS)
See nVent Cooling Sales and Service Contacts on page 4
REMOTE ACCESS CONTROL (OPTIONAL)
See Electronic Controlling Section on page 13–24
DOOR SWITCH
If a door switch is available, connect it to the terminals marked WHT/DS1 and WHT/DS2. The switch
circuit should be open when the door is closed, and closed when the door is open. Several door switches
may be connected in parallel and operated on one cooling unit. The door switch only supports a oating
connection with no external voltages.
ACTIVE CONDENSATE MANAGEMENT
At low temperatures and high humidity levels inside the enclosure, condensation may form on the
evaporator coil.
Slim Fit air conditioners continuously evaporate the water that may be in the drain pan due to
condensation from the evaporator coil into the external air stream. Excess condensate is routed
downwards out of the air conditioner via a barbed tting at the bottom of the condenser side of the unit.
A 10 mm (.40) inside diameter tube can be attached to the tting and routed to a nearby drain.

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MOUNTING
TOOLS REQUIRED FOR INSTALLATION:
• #2 Phillips screwdriver
• 6.5 mm slotted screwdriver
• 13 mm wrench or socket
EXTERNAL MOUNTING
1. Using the mounting gasket kit provided with the unit, install gasket to the air conditioner, see
Figure 1.
2. Screw the supplied grub screws into the blind nuts on the rear of the unit, see Figure 2.
3. Secure the unit to the enclosure using the supplied washers and nuts. Use caution to avoid
damaging the gasket while positioning the unit.
Figure 1 Figure 2
PARTIAL RECESSED MOUNTING (NOT APPLICABLE TO 300W UNIT)
1. Carefully remove the louvered grille, and where applicable, remove the center panel from the
enclosure by pulling forwards. See Figure 3 on page 12.
2. Carefully disconnect the connectors from the rear of the smart controller.
3. Remove the two front screws.
4. Remove the four nuts on the front panel and pull the panel assembly forward approximately 5 cm.
See Figure 4 on page 12.
5. Disconnect the fan electrical connection.
6. Remove the front panel.
7. Remove the four standoffs, leaving the grub screws in place.
8. Push the rear enclosure half into the mounting cutout and secure it with the four standoffs. See
Figure 5 on page 12.
9. Push the smart controller cables through the rectangular hole in the front panel.
10. Reconnect the fan electrical connector.
11. Mount the front panel using the nuts removed in step 4.
12. Install two front screws.
13. Carefully reconnect the smart controller connectors .
14. Push the louvered grille and, where applicable, the center panel, onto the front panel. See Figure 6 on
page 12.

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Figure 3 Figure 4
Figure 5 Figure 6

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ELECTRONIC CONTROLLING SECTION
DIGITAL THERMOSTAT CONTROLLER (OPTIONAL)
OVERVIEW
The digital thermostat (controller) is a parametric controller for the complete management of air conditioners.
All settings are pre-programmed at the factory. Cooling/heating setpoint, cooling/heating differential and high/
low temperature setpoint are designed to be adjustable by the operator. All alarms are outputted through the
alarm relay. In addition, if nVent HOFFMAN network card (Remote Access Control (RAC) Module) is used the
parameters that state above and alarms are accessible remotely through Ethernet connection utilizing SNMP,
Modbus TCP, EtherNet/IP, and Pronet protocol . A USB connection from the network card is also provided with
accessibility to the digital thermostat controller utilizing Modbus RTU and RS-845 serial bus. In addition, the USB
connection is also used to read the network information from the nVent HOFFMAN network card and temperature
setpoints and alarm from the controller. Note that nVent HOFFMAN network card (RAC module) is acting as
a gateway to the digital thermostat where temperature setpoints and alarm can be viewed and/or changed
remotely.
NOTE: HOFFMAN NETWORK CARD (RAC MODULE) IS OPTIONAL ACCESSORY, THEREFORE,
SOME OF THE AIR CONDITIONERS SHIP WITHOUT THE NETWORK CARD BUT IT IS
UPGRADEABLE UPON REQUEST
ENERGIZING THE CONTROLLER
The digital controller is wired and programmed at the factory to operate when power is applied to the air
conditioner. In normal condition, the evap fan starts operating after the completion of the self-evaluation which
is less than 30 seconds and fan icon should be illuminated along with the inlet and outlet temperature data (if an
option outlet temperature sensor is installed).

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CONTROLLER STATUS INDICATION
The display has numerous symbols to indicate the various controller functions such as cooling, heating, alarming,
evaporator fan, and heating. Indicators (icons) are steady illuminated on screen when active.
Figure 1: Display
KEYPAD
SYMBOL COLOR ICON INDICATION ICON STATUS
Red Alarm - active when alarm is detected Flashing when alarm is
detected
White
Keypad Select – access to passcode , hold 5 sec to turn unit ON/OFF, parameter
menu, parameter setting, write or save to EEPROM, and hold for 3sec to return to
main screen
ON
White Keypad Up – navigate to previous parameter and increasing parameter variable ON only when reviewing
parameters
White Keypad Down – navigate to next parameter and decreasing parameter variable,
all inputs, unit status.
ON
MAIN FIELD
SYMBOL COLOR ICON INDICATION ICON STATUS
°C White When operating temperature in degrees Celsius ON
°F White When operating temperature in degrees of Fahrenheit ON
Main Field
Line 1 White Display inlet temperature ON
Main Field
Line 2 Orange
Display outlet temperature in standalone mode if outlet sensor is present
Displays device ID for primary-secondary mode up to 10 units, 1:10 … 10:10 or
lead-lag mode up to 2 units, 1:2… 2:2
ON
ICONS
SYMBOL COLOR ICON INDICATION ICON STATUS
White Compressor Running Flashing while waiting for compressor to turn ON
Steady ON while compressor is running
White Evaporator Running ON
White Electric heater ON ON
White Primary and/or lead
controller ON
White Freeze control Compressor and Condenser fan OFF while illuminated
White Power ON ON

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DISPLAYING AND CHANGING PROGRAM SETTINGS
TO VIEW OR ACCESS THE SETTINGS
To access folder menus.
1. Press button to display passcode screen, the screen displays PSd on line 1 and 0000 on line 2.
2. Press button to access to passcode , the rst digit of 0000 is ashing and press 3 more times until the
last digit of 0000 ashes.
3. Press arrow two times to change the 0 to 2. Press for access to folder menus.
NOTE: To exit the security level to the main screen wait one minute with no action or Press
arrow until LOG Out message displays, then press button.
TO CHANGE A PARAMETER SETTING
1. Once in the folder menu navigate to the desired setting to be changed using the arrow to scroll
and button to access a menu or parameter.
2. To change a parameter Press button and parameter value will begin to ash.
3. Press / arrow to the desire value.
4. Press button to save the setting and the screen will revert to the parameter mnemonic.
NOTE: IF BUTTON IS NOT PRESSED, THE NEW SETPOINT IS NOT SAVED.
To exit the parameter settings to the main screen wait one minute with no action or
Press arrow few times until ESC displays, then press button to return to UoF screen.
From the UoF screen Press arrow few times until LOG Out message displays, then
press button to return to the main screen.
Selecting ESC returns to folder menu
Selecting LOG out returns to main screen

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MODELS WITH °C CONTROLLERS
TABLE 1: HEAT/COOL OPERATING PARAMETERS
Mnemonic Parameter Description Default Value Range
CSt (1) Cooling setpoint 35 C 20 C to 55 C
Cd (Cd1) (1) Cooling differential 5 C -
Cd2 (2) Cooling differential 2 8 C -
NOTES: (1) Compressor or cooling turns ON at CSt and OFF at CSt - Cd
(2) Cooling differential 2 is only applied to lead-lag application
TABLE 2: ALARM PARAMETERS (°C)
Mnemonic Para Description Default value
Ht High temperature alarm setpoint 55 C
Lt Low temperature alarm setpoint 14 C
dO (1) Alarm input contact - Door open/smoke detected NO
ArOP (2) Alarm output contact - all alarms NO
NOTES: (1) The Alarm input contact - Door open/smoke detected is configurable
(2) The alarm relay output logic is configurable
MODELS WITH °F CONTROLLERS
TABLE 3: HEAT/COOL OPERATING PARAMETERS
Mnemonic Parameter Description Default Value Range
CSt (1) Cooling setpoint 80 F 72 F to 120 F
Cd (Cd1) (1) Cooling differential 7 F 2 F to 25 F
Cd2 (2) Cooling differential 2 15 F
NOTES: (1) Compressor or cooling turns ON at CSt + Cd and OFF at CSt
(2) Cooling differential 2 is only applied to lead-lag application
TABLE 4: ALARM PARAMETERS (°F)
Mnemonic Para Description Default value
Ht High temperature alarm setpoint 125 F
Lt Low temperature alarm setpoint 40 F
dO (1) Alarm input contact - Door open/smoke detected NO
ArOP (2) Alarm output contact - all alarms NO
NOTES: (1) The Alarm input contact - Door open/smoke detected is configurable
(2) The alarm relay output logic is configurable

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REAL-TIME-CLOCK SETTING
This controller is equipped with a real time clock for logging the time and date of alarm activities. There are ve
parameters designating to the minute, hour, year, month of the year, and day of the month as illustrated in below
table.
Mnemonic Par Description
t01 Unit of hour (0 - 23)
t02 Unit of minute
t03 Unit of year
t04 Unit of month
t05 Unit of day
SEt Save
VIEW ALARMS
Alarms may be viewed when the alerting icon is ashing.
1. On the main screen, press the alerting icon button
2. The screen displays the most recent or newest alarm where the alarm code display on line 1 and the alerting
icon is now in steady
3. Press arrow to view next alarm if there are more than one
4. Press arrow to display ESC, then press button to return to the main screen
VIEW THE ALARMS IN THE ALARM HISTORY FOLDER
1. Follow instructions above to enter the passcode and open the alarm history folder (AHiF).
2. Press button to access to the alarm history.
3. Press arrow to display the mnemonic alarm on line 1 and time, month, and day display on line 2. For
example, low temp alarm (Lt) displays on line 1 and 09:24 and 0706 display on line 2 in sequence. Note
that the time, and date recorded in the alarm history is based on the local real-time-clock if congured after
installation.
4. Press arrow to view next alarm. The controller is able to retain up to 25 events
5. Press arrow until the screen displays ESC, then press button to return to the main screen or if no
action for longer than 60 seconds the screen will be automatically revert to the main screen.
NOTE: If no alarms are present then only ESC will be displayed in the folder.

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There are seven possible alarms (non-latching) detectable by the controller and are indicated on the controller
display. All alarms are accessible locally. If a nVent HOFFMAN network card (RAC module) is used, alarms are
also accessible remotely through the Ethernet and USB connection.
Mnemonic
Alarm Description Cause Result Alarm Relay Output
dO Door open alarm Enclosure door opens or not
properly close Compressor and evap fan turn OFF in duration of alarm Closed
S1F Inlet temperature sensor
fault Inlet temp probe failed No effect on function, controller
continue operating as normal using
outlet sensor with setpoint of 10 C Closed
S2F Outlet temperature
sensor fault Outlet temp probe failed No effect on function but loss freeze protection Closed
LA Malfunction alarm MALF high pressure switch
opens No effect on function Closed
Ht High temp warning Enclosure air exceeds high
temp alarm setpoint No effect on function Closed
Lt Low temp warning Enclosure air drops below
low temp alarm setpoint No effect on function -
FA Frost alarm Evaporator coil freezes
Compressor and condenser fan turns
OFF at or below -1 C for the duration
of alarm. Alarm clears when the outlet
temperature sensor reaches 15 C
Closed
TO RESET THE ALARMS IN ALARM HISTORY FOLDER
The controller is designed with ability to reset or clear the alarm history
1. Follow instructions above to enter the passcode and open the reset folder (rStF).
2. The screen displays rSAL on line 2 and nO on line 1, press button the nO is ashing
3. Press arrow to change nO to YeS, then press button reset the alarms. The screen ashes once and
returns to rSAL with nO one line 2
4. Press arrow to navigate to ESC, then press to returns to rStF screen.
5. Press arrow to navigate to LOG Out, then press button to return to the main screen or if no action for
longer than 60 seconds the screen will be automatically reverted to the main screen.
TO RESET PARAMETERS TO FACTORY DEFAULT
This option is ONLY applied if the operator wants to reset all control parameters back to factory default.
1. Follow instructions above to enter the passcode and open the reset folder (rStF).
2. The screen displays rSAL, press arrow to navigate to rSPA and then press button
3. The screen displays rSPA one line 1 and the word nO on line 2 in steady state, press button and then the
word nO is ashing and ready to change
4. Press arrow to change nO to YES. Press button the screen displays PSd with 0000 on line 2
5. Press button to enter to passcode. Press button few times until the last digit of 0000 ashing
6. Press arrow to change 0to 2, press button to authorize the reset of the parameters
7. The screen returns to rSPA screen in steady state.
8. Press arrow to navigate to ESC, then press to returns to rStF screen.
9. Press arrow to navigate to LOG Out, then press button to return to the main screen or if no action for
longer than 60 seconds the screen will be automatically reverted to the main screen.

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DISPLAYING TEMPERATURE DATA ON SCREEN
There are two temperature probes in the air conditioner where one is reading the enclosure air temperature
incoming to the air conditioner and other is reading the cooled air leaving the air conditioner and entering the
enclosure. Both temperature data are displayed on the screen where line 1 is the reading of the inlet temperature
and line 2 is the reading of the outlet temperature.
COMPRESSOR RESTART TIME DELAY
A factory set 3 minute (180 seconds) restart delay exists to reduce residual back pressure before allowing
the compressor to restart. The compressor will stay off for the entire restart duration after the compressor is
disabled. A ashing compressor icon on the display indicating that the unit is in a compressor restart delay
mode while calling for cooling or waiting for compressor to turn ON.
ALARM INPUT CONTACT - DOOR OPEN/SMOKE DETECTED
The digital controller can accept a dry contact/switch input via the two 18 AWG white wires located at the back of
the air conditioner. This input is associated with the controller display alarm mnemonic dO (door open).
Note: Do NOT apply power to this dry contact input.
Para Description Conguration
H05 Door Open and/or smoke detected 1 = normally open (NO) – factory default
2 = normally closed (NC)
ALARM OUTPUT CONTACT – ALL ALARMS
The digital controller has a normally open dry contact alarm output with a resistive load rating of 250VAC @
5 amps max. The two yellow 18 AWG wires located at the back of the air conditioner provide a connection to this
output. Note: Do not apply power to this normally open dry contact (two yellow 18 AWG wire). This alarm relay
output is congurable and provides user with the ability to change the conguration to support their external
device. Parameter C21 controls the alarm relay output logic and can be accessed through security code “0022” in
the PArF folder.
Para Description Conguration
C21 Alarm relay output logic 0 = normally open (NO) – factory default
1 = normally closed (NC)