Cotek SR series User manual

SR Series
1KW Pure Sine Wave Power Inverter
User ’s Manual

SR Series Inverter
1
Contents
1. Important Safety Instructions……………………………………………………………………. 3
1-1 General Safety Precaution…………………………………………………………………… 3
1-2 Other Safety Note………………………...…………………………………………………… 3
2. Introduction to Functional Characteristics……………………………………………………. 4
2-1 System...……………………………………………………………………………………….. 4
2-2 Block Diagram.…………………..……………………………………………………………. 5
2-3 Electrical Performance…..……………………………………………………………………. 6
2-4 Mechanical Drawings..………………………………………………………………………... 7
3. Installation and Maintenance….…………………………………………………………………. 8
3-1 Rear Panel……..……………………………………………………………………………. 8
3-2 Deutsch Wichtige Sicherheitshinweise........................................................................ 13
3-3 Front Panel……..……………………………………………………………………………. 15
3-4 Maintenance…….………..……….…………………………………………………………. 16
4. Operation……………………………………………………………………………………………. 16
4-1 Connecting the Input Power………………………………………………………………….. 16
4-2 Connecting the Loads..……………………………………………………………………….. 16
4-3 Inverter Operation...………..…………………………………………………………………. 16
4-4 Protection Features……………………………………………………………………………. 17
5 Front LCD Panel Display and Setup……………………………………………………………. 17
5-1
LCD Panel Indications………….……………………………….……………………………. 17
5-2 Startup Sequence and Standby Status…..……….……………..………………………….. 19
5-3 Setup Menu Operation and Instructions……………………………..……………………... 20
6. RS232 Communication and Operation…..…………………………………………………….. 25
6-1 Operation of RS-232 Serial Port..……. ………………………….…………………………. 25
6-2 Interface Command………………………………………………..………………………….. 26
6-3 Example of RS232 Operation……………………………………………………….……….. 26
7. Information………………………………………………………………………………………….. 31

SR Series Inverter
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7-1 Troubleshooting……………………………………………………………………………… 31
7-2 Warranty……………………………………………………………………………………... 31
8. Appendices………………………………………………………………………………………….. 31
8-1 FCC (Class B) Declaration of Conformity………………………………………………… 32
8-2 EMC Declaration of Conformity……………….…………………………………………... 33
8-3 TUV(EN60950) Declaration of Conformity..…………….………………………………... 34
© Copyright: This manual is the copyright of COTEK Electronic Industrial. Co., Ltd. And may not be reproduced or copied
without the express permission of the owner.

SR Series Inverter
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1. Important Safety Instructions
1-1. General Safety Precautions
1-1-1. Do not expose the inverter to rain, snow, spray or dust.
To reduce the risk of fire hazard, do not cover or obstruct the
ventilation openings and. do not install the inverter in a zero-
clearance compartment.
1-1-2. To avoid the risk of fire and electric shock, make sure that the
existing wiring is in good electrical condition; and that the wire size
is not undersized.
Do not operate the inverter with damaged or substandard wiring.
1-1-3. Depending on the use, the AC output of the inverter may require
user installed breaker or fusing. For telecom use, a GFCI has not
been provided. The inverter incorporates standard AC short circuit
protection.
1-1-4.The following precautions should be taken when working on the
inverter:
▌Remove watches, rings, or other metal objects.
▌Use tools with insulated handles.
▌Wear rubber gloves and boots.
1-2. Other SafetyNotes
1-2-1. Upon receipt, examine the shipment box for damage. Notify the
carrier immediately, before opening, if damage is evident.
1-2-2. Do not operate near water or in excessive humidity.
1-2-3. Do not open or disassemble the inverter, warranty may be voided.
1-2-4. The DC side connections should be firm and tight.
1-2-5. Grounding: Reliable grounding of rack-mounted equipment should
be maintained.
1-2-6. Do not drop a metal tool on the battery. The resulting spark or short-
circuit on the battery or on the other electrical part may cause an
explosion.
WARNING!
SAVE THESE INSTRUCTIONS – This manual contains
important instructions that should be followed during
installation and maintenance of the inverter.

SR Series Inverter
4
1-2-7. Install the inverter in a well-ventilated area. Do not block the front
air vents, or the rear air exhausts of the unit.
1-2-8. Wiring: Adequate input power must be supplied to the inverter for
proper use; correct wiring sizes must be ensured.
1-2-9.Mount the inverter such that the fan axis is horizontal.
1-2-10.Do not operate the inverter close to combustible gas or open fire.
1-2-11. Do not operate appliances that may feed power back into the
inverter.
1-2-12.Temperature: The inverter should be operated in an ambient
temperature range of 0℃to 50 ℃or else the output efficiency
may be affected. Air flow to the inverter must not be restricted.
2. Functional Characteristics Introduction
2-1.System
The unit is a highly reliable DC-AC inverter system, designed with advanced
power electronic and microprocessor technology offering the following features:
▌The inverter is equipped with a self diagnosis microprocessor that is
able to identify and show all failure messages on the LED/LCD display,
with associated visual/audio alarms.
▌ 1U height x 19” width x 13.6” depth, 19” rack mountable.
▌Pure sine wave output (THD < 2%) to operate higher-end electronic
equipment.
▌Built in 15A(120VAC) and 10A(250VAC) rated Bypass relay.
▌Speeds up transfer time as a result of synchronized operation with the
AC source at all times that allows the transfer to be interruption-free for
sensitive equipment.
▌Intelligent software for power management.
▌AC Inlet and Dual AC outlets connection model option.
▌Loading and temperature controlled cooling fan.
▌Fan aging, failure, disconnection and blockage alarm.
▌Selectable Bypass/Inverter modes.
▌Local and remote management and control.

SR Series Inverter
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▌RS-232 communication.
▌Dry contact terminal.
▌Efficiency >90%. (Full linear load at 220VAC Output)
▌ Advanced Protection Features:
Input over/under voltage protection.
Internal over temperature protection.
Input reverse polarity protection (Fuse).
Output overload protection.
Output short circuit protection
AC input short circuit protection: Breaker (6 Amp or 12 Amp)
2-2. Block Diagram
AC GRID
INPUT
DC
INPUT
FILTER
DC DC
AC
DC FILTER AC
OUTPUT
BYPASS RELAY
The inverter features IGBT technology which, minimizes weight and dimension,
while enhancing output short circuit reliability and overload capacity.
AC output voltage is provided in one of the two following modes:
1). From DC to AC Inverter Mode: (On-line Mode)
2). From AC Input Bypass Mode: (Off-line Mode)
Either mode is front panel programmable.
In the first option, Off-line mode,AC output power will be supplied through the AC
bypass mode in its normal operation. Upon AC input failure, output power will be
diverted through the DC to AC Inverter Mode. Once AC mains are restored, the unit
will revert from the Inverter Mode to the Bypass Mode.
In the second option, On-line mode, AC output power will be provided directly by
the inverter from the DC source. Should the DC source or inverter fail, the system
will transfer its output power through the bypass mode. Once the DC power source
is restored, the system will revert to the inverter mode.

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2-3. Electrical Performance
Electrical Specification Model No.
Input
Characteristics
Item SR1000-124 SR1000-148 SR1000-224 SR1000-248
Voltage 24 VDC 48 VDC 24 VDC 48 VDC
Input Over-Voltage Protection 30~34 VDC 60 VDC MAX. 30~34 VDC 60 VDC MAX.
Input Under-Voltage Protection 18~22 VDC 36~44 VDC 18~22 VDC 36~44 VDC
Voltage Range 18~34 VDC 36~60 VDC 18~34 VDC 36~60 VDC
No Load Current 1.4 A 0.75 A 1.3 A 0.7 A
Output
Characteristics
W0001rewoPtuptuOsuounitnoC
Maximum output Power (3Min) 1100 W
Surge Power 2000 W
Frequency 47 ~ 63 Hz +/- 0.05 % (User-selectable)
Output Voltage 97~123 VAC (User-selectable) 194~246 VAC (User-selectable)
Efficiency (Full Load) 87% 88% 90% 91%
Short-Circuit Protection Yes , Ipk
Output Waveform Pure Sine Wave (THD < 2%)
Signal and Control
noitagivanrofdapyekhtiwlenaPDCLseniL2lenaPDCL
LED Indicator Red / Orange / Green LED
Dry Contact Terminal By a relay
Remote Control Terminal Controls the inverter ON / OFF operation
Protection
Input Protection Over / Under Voltage, Reverse Polarity (Internal Fuse)
AC Output Protection Short-Circuit, Overload
AC Input Protection 12 Amp Circuit Breaker 6 Amp Circuit Breaker
Temperature protection Shutdown (Internal temperature≧65℃)
Bypass Relay
Relay Specification 15Amp / 120VAC , 10 Amp / 250 VAC
Bypass relay selectable On Line/Off Line (Haphazard, Normal, Exacting) selectable
Switching Time From AC bypass mode(Off-line Mode) : ≦20mS
From DC to AC inverter mode(On-line Mode) : ≦8mS
Operating
Temperature
Full Load 0℃~ 50 ℃
Storage -30 ℃~70 ℃
Fan Operation and
Indicator
tcatnocyrddnamralarezzuBnoitacidnIeruliaF
Switches On when Internal Temperature ≧55℃or Load≧30%
Switches Off when Internal Temperature ≦45℃and Load≦20%
Mechanical
Specification
Size (W X H X D) 19”x1.71”x13.6”(482.6mmX43.5mmX345mm)
Weight 5.8 Kgs (12.7 Lbs)
Safety and EMS
1-05906NEsteeM05906LUsteeMsdradnatSytefaS
EMC Standards FCC Class B
EN55022: 1998+A1: 2000+A2: 2003 Class B
EN55024: 1997+A1: 2001+a2: 2003
EN61000-3-2: 2006 Class A
EN61000-3-3: 1995+A1: 2001
Note: The specifications are subject to change without notice.

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2-4. Mechanical Drawings
SR Series Inverter Ordering Information
Model
Number
Input
Voltage
Output Voltage
Nominal
Output Voltage
Range
Frequency
Range
SR1000-124 24 VDC 110 VAC 100~120 VAC 47~63 Hz
SR1000-224 24 VDC 230 VAC 200~240 VAC 47~63 Hz
SR1000-148 48 VDC 110VAC 100~120 VAC 47~63 Hz
SR1000-248 48 VDC 230VAC 200~240 VAC 47~63 Hz
ON
OFF
REMOTE
Max. 60V
INV. FAILURE RS-232
AC INPUT
BREAKER
CHASSIS
GROUND
WARNING:
POS(+)NEG(-)
REVERSE POLARITY
WILL DAMAGE UNIT
AC INPUT
120Vac
10A 47-63Hz
OUTPUT
120Vac
10.3Amax.
GND
ENB
ENB
NC
NO
COM.

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3. Installation and Maintenance
3-1. Rear Panel
REAR PANEL VIEW
DC INPUT
NEGATIVE(-)
DC INPUT
POSITIVE(+)
ROMOTE
CONTROL
TERMINAL
DRY
CONTACT
TERMINAL
STANDARD
RS-232
FG AC
OUTPUT
SOCKET
AC
INPUT
SOCKET
AC
INPUT
BREAKER
3-1-1. AC Input Breaker:
The AC input circuit breaker protects the unit from overload. When an overload
condition occurs, the circuit breaker trips and disconnects the AC grid power
input. To reset it, push the circuit breaker button. The cause of tripping should
be ascertained and corrected before the unit is reset .
3-1-2. AC wiring connections:
▌AC socket:
▌Connect AC input wiring to the Inverter socket.
Please use the following information as your reference:
FG
FG
L N
FG
AC INPUT
BREAKER
RL2
RL3
BYPASS RELAY
N
L
INVERTER
"L"
INVERTER
"N"
L
N
LN
FG
AC output receptacles
for 120VAC version
(NEMA5-15R)
AC Input Receptacle
(IEC 60320 C 14)
AC output sockets for
230VAC output version
(IEC 60320 C 13 receptacles)
or
Max. 60V
INV. FAILURE RS-232
AC INPUT
BREAKER
CHASSIS
GROUND
WARNING:
POS(+)NEG(-)
REVERSE POLARITY
WILL DAMAGE UNIT
AC INPUT
120Vac
10A 47-63Hz
OUTPUT
120Vac
10.3Amax.
GND
ENB
ENB
NC
NO
COM.

SR Series Inverter
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3-1-3. AC output socket:
110VAC
NEMA 230VAC
I.E.C 60320 C13
Socket Wire color Wire length /
gauge
120 VAC 230 VAC
AC Output Line (L) NEMA I.E.C C13
Within 16 feet /
AWG# 14~16
26~32 feet /
AWG# 12~14
Neutral (N)
AC Input Line (L)
I.E.C C14
Neutral (N)
Chassis Ground Green / Yellow or Bare copper
Note. Please double check and review all the connections to ensure that the
wires are connected to the correct inlet.
3-1-4. Chassis Ground: Must be connected to earth ground prior to
making any other connections to the equipment.
3-1-5. RS-232: Serial port monitoring and control through computer interface.
3-1-6.Remote control and Dry contact terminal:
Normally Colsed
RELAY
COM.
NO
NC
ENB ENB
GND
Remote Control Terminal Dry Contact Terminal
Common
Normally Open
GOUND
ENABLE -
ENABLE +
▌Remote Control Terminal:

SR Series Inverter
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1). Before installing the inverter, ensure that the main switch “OFF”.
2). Before using the remote function, ensure that the main switch pressed
toward “REMOTE”.
3). Ensure that the remote contacts are off.
4). Use 20 ~ 24 #AWG wire to connect the remote control terminals.
5). Remote control ON/OFF inverter setup status:
GND
TR
OFF : INV. OFF
ON : INV. ON
ENB
BAT+
BAT-
+
-
DC
POWER
GND
ENB
OFF : INV. OFF
ON : INV. ON
ENB
OFF : INV. OFF
ON : INV. ON
LOW : INV. OFF (TR OFF)
HI : INV. ON (TR ON)
GND
ENB
NOTE: At one time, only one remote function should used to control the inverter.
The maximum voltage value is 60VDC.
▌Dry Contact Terminals:
Dry contact terminals may be connected to a Form C relay for “FAULT”
indication. When “FAULT” occurs, the relay switches.
NOTE: Fault conditions include Input under/over voltage, Output Short Circuit,
Over Temperature, Over-load and, Fan Failure.
Specifications of the Relay
Maximum
Voltage Load Contact Rating Number of operations
Operating/Storage
Temperature
N.O. N.C.
240 VAC Resistive 16 A 100,000
-30℃~70℃
240 VAC Resistive 8 A
30 VDC Resistive 16 A
30 VDC Resistive 8 A
▌Remote Control Terminal:

SR Series Inverter
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Dry Contact Terminal Relay
COM. Common contact
N.C. Normally closed contact
N.O. Normally open contact
3-1-7.DC Input Connection:
Follow the instructions to connect the battery cables to the DC input
terminals of the inverter. The cables should be as short as possible
(less than 6 feet / 1.8 meters ideally) so that they can handle the
required current in accordance with the Electrical Codes and
Regulations. The size of the cable should be thick enough to limit the
voltage drop to less than 2% when carrying the maximum input current
to prevent frequent low-input voltage warnings, and shutdown. UVP
(Under Voltage Protection) warning may result if there is excessive
voltage drop across the DC cables between the batteries and the
inverter. Increasing your DC cable size will help improve the situation.
Batteries are capable of providing very large currents in case of short
circuit. In case there is a short circuit in the cable run between the
batteries and the input terminals of the inverter, it will result in
overheating / melting of the cables and consequent risk of fire and
injury, To prevent possibility of this hazard, use Very Fast Acting DC
Fuse in line with the positive cable. The fuse should be as close to the
positive battery terminal as possible. Use Bussmann ANN series fuses
( will also require Fuse Block 4164) or equivalent.
The following sizes of cables and fuses are recommended for up to 6 ft.
distance between the batteries and the inverter. (Applies to both 120
VAC and 230 VAC versions):
Model No Wire AWG Inline Fuse
SR1000-124 / 224 # 4 80 A
SR1000-148 / 248 # 6 40 A
▌Connect DC input terminals to 24V / 48V battery or other DC power source.
[ + ] is positive, [ - ] is negative. Reverse polarity connection can blow the
internal fuse and may damage the inverter permanently.
WARNING!
Make sure that all the DC connections are tight (torque
to 9 – 10 ft-lbs, 11.7 – 13 Nm). Loose connections
could result in overheating and can be a potential
hazard.

SR Series Inverter
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M8 SCREW
PVC WIRE
(AWG#4 - #6)
POSITIVE+
RING
TERMINAL
PVC WIRE
(AWG#4 - #6)
RING
TERMINAL POSITIVE+
Also, only use high quality copper wire and keep the cable length short
which is a maximum of 3 - 6 feet.
POSITIVE+
INLINE FUSE
BATTERY
POSITIVE+
WARNING!
The recommended inline fuse should be installed as
close to the battery positive terminal as possible
Failure to use a fuse on the “+” cable running
Between the inverter and battery may cause
damage to the cable / inverter and will void warranty.

SR Series Inverter
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3-2. Wichtige Sicherheitshinweise
Modelle:SR1000-224, SR1000-248
Nennwerte:
DC Eingangs Spannung / Strom: 18.0 – 34.0 Vdc, 69A.（für Modell SR1000-224）
DC Eingangs Spannung / Strom: 36.0 – 60.0 Vdc, 35A.（für Modell SR1000-248）
AC Eingangs Spannung: 200 – 240 Vac, 50 Hz, 5 A.
Ausgangs Spannung: 194 – 246 Vac, 47 – 63 Hz, 5.16 A.
1. Bitte lesen Sie diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den späteren Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie
keine Flüssig- oder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes
Tuch zur Reinigung.
4. Das Gerät ist vor Feuchtigkeit zu schützen.
5. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder
Fallen könnte Beschädigungen hervorrufen.
6. Beachten Sie beim Anschluss an das Stromnetz die Anschlusswerte.
7. Verlegen Sie die Netzanschlussleitung so, dass niemand darüber fallen kann. Es
sollte auch nichts auf der Leitung abgestellt werden.
8. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
9. Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen
Sicherheit nur von autorisiertem Servicepersonal geöffnet werden.
10.Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und
von einer qualifizierten Servicestelle zu Überprüfen:
a. - Netzlabel oder Netzstecker sind beschädigt.
b. - Flüssigkeit ist in das Gerät eingedrungen.
c. - Das Gerät war Feuchtigkeit ausgesetzt.
d. - Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert
oder Sie mit Hilfe dieser Anleitung keine Verbesserung erzielen.
e. - Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. - Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
11. Dieses Schaltnetzteil kann bis zu einer Außentemperatur von maximal 50°C
betrieben werden.
12. Der Schalldruckpegel in der Operatorposition entsprechend
IEC 60704-1 1982 ist gleich oder weniger als 70dB(A)
13. Zum Netzanschluss dieses Gerätes ist eine geprüfte Leitung zu verwenden.
Es ist eine Leitung vom Typ: H03VV-F, H05VV-F, 3G, 0.75mm2oder besser
einzusetzen.
14. Wechselstrom Eingangs Überstrom-Schutz: 6Ampere Stromunterbrecher.
Die folgenden Größen des Kabels für Erdleitung des CHASSIS:

SR Series Inverter
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Modell Nummer Leitungs-Diameter [mm]
SR1000-124 / 224 5.19
SR1000-148 /248 4.11
Den DC Eingang an eine 24V/48V Batterie oder am eine andere DC
Spannungsquelle anschließen. [+] ist positiv, [-] ist negativ. Umgekehrter
Anschluss kann zum durchbrennen der internen Sicherung fuhren und kann den
Inverter dauerhaft beschädigen.
ANWENDEN
Die empfohlene Interne Sicherung sollte so nah wie möglich zur Plus-Klemme
der Batterie angebracht werden. Ohne eine Sicherung zwischen dem
„+“ Anschluss der Batterie und dem Kabel, das zwischen den Inverter und die
Batterie läuft, kann das Kabel oder der Inverter beschädigt werden. In diesem
Fall wird die Garantie ungültig.

SR Series Inverter
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``
16. Vor Gebrauch muss dieses Gerät an einen zuverlässigen Schutzleiter
angeschlossen werden.
17. Dieses Gerät ist vorgesehen für Installation in eine Betriebsstätte mit
beschränktem Zutritt und der DC Eingangsanschluss muss an die Rückseite
des Baugruppenträgers angebracht werden um zu verhindern das es durch
qualifiziertes Service-Personal berührt wird.
3-3. Front Panel
FRONT PANEL VIEW
MAIN
SWITCH FAN VENTILATOR
3-3-1. Main Switch: These are the 3-stage rocker switches for turning on, turning off
and remote mode.
3-3-2. LED’s Indicators: See details in Section 5-1.
3-3-3. LCD Display Selection Buttons:

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Data pertaining to the DC input voltage, AC output voltage, AC output
frequency, AC output current, etc. and system status can be shown
sequentially on the LCD display by pressing these buttons. Please refer to
chapter 5 for more information.
3-3-4. FAN ventilation grille (1)~(3): The fans behind the ventilation grilles provides
cooling. DOT NOT obstruct these vents!
3-4. Maintenance
3-4-1. Make sure that the fan vents are not blocked.
3-4-2. Use a vacuum cleaner to remove any dust from the fan area.
3-4-3. When cleaning the case or front panel, use a soft, dry cloth, only. If the case
or front panel is very dirty, use a neutral, non-abrasive detergent. Do not use
alcohol or ammonia based solutions.
3-4-4. Regular service, and relocation of the inverter, should be performed by a
qualified service technician.
3-4-5. Avoid spilling liquid on the inverter.
4. Operation:
4-1. Connecting the input power
Before making the DC input side connections, the main switch must
be “OFF”.
4-2. Connecting the loads
▌Calculate the total power consumption(W) of the output load. Make sure that
the total power consumption does not exceed the rated load.
▌Should the total load exceed the rated capacity of the inverter, remove the
non-critical. loads until the rated total has been reached.
4-3. Inverter Operation
▌Set the power switch to the “ON” position. The buzzer will sound “beep beep”.
The inverter will carry out self-diagnosis and, the LED’s will also appear various
colors. At the, same time the LCD will display ”SR-1000
INVERTER INITIALIATION..”.
Finally, the buzzer will sound another “beep” and the “INVERTER” and

SR Series Inverter
17
status LED’s will turn “Green”, The LCD Display will display “Vi, Vo, FQ, Io“.
THE, inverter will start operating normally.
▌Set the power switch to the “OFF” position. THE, inverter stops and all
the lights that are on will, go off.
4-4. ProtectionsFeatures
Model
DC Input (VDC) Over Temperature Protection
Over Voltage Under
Voltage
Alarm
Under Voltage INTERIOR HEAT SINK
Shut-down Restart Shut-down RestartShut-
down Restart Shut- down Restart
24 V 30.1~34.1 28~32 19~23 18.1~22.1 23~27 65℃45℃105℃75℃
48 V 60.1 56~60 38~46 36.1~44.1 46~54
5. Front LCD Panel – Display & Setup
5-1. LCD Panel Indications
5-1-1. Set the Power Switch to the “ON” position. THE, inverter starts working
normally. The inverter will be operating in normal condition when either
of the following messages are displayed on the LCD screen:
FQ=60.0 Io =8.5
Vi =24.0 Vo=115
LED's
INDICATORS
LCD
DISPLAY
LCD DISPLAY
SELECTION BUTTONS
5-1-2. LED Indications:
▌AC GRID: Displays AC input status.
AC Input LED Status
AC input and DC-AC Inverter
Output are Synchronous Green
AC input ON Orange
AC input OFF Off
Note. Synchronous means that the: grid AC input frequency and DC-AC
inverter output frequency or phase are the same (See details in

SR Series Inverter
18
Section 5-3-3).
▌INVERTER: Displays DC-AC inverter status.
DC-AC Inverter LED Status
Power OK Green
Power Not Good Red
▌BYPASS: Displays Bypass relay status.
BypassLED Status AC Output (Load)
From DC-AC inverter
(On-line Mode)
Orange AC Input
Off DC-AC Inverter
From AC input bypass
(Off-line Mode)
Green AC Input
Off DC-AC Inverter
▌ALARM: Displays status of the Failure Alarm.
Alarm LED Status
Over/Under Alarm
/FAN Alarm Orange
Set alarm in the inverter to
operate normally Off
NOTE. For instructions on setting the alarm, see details in Section 5-3.
5-1-3. LCD Display Selection Buttons:
▌Function of Various Keys :
Function <Up>: You can use the “up” button to scroll through the menus.
or to select the value for set up under setting mode.
Function <Down>: You can use the “Down” button to scroll through the

SR Series Inverter
19
menus or to select the value for set up under setting
mode. .
Function <Page Up>: You can use the “Page Up” button to scroll through the
menus.
Function <Page Down>: You can use the “Page Down” button to scroll
through the menus.
Function <Enter Setup Menu>: Press the button longer than 2 seconds,
The inverter will change to “Setup Menu Mode”
which appears on the LCD screen for the user
to set functions.
Function <Enter>: Confirms a selection or value.
5-1-4. LCD Display: Displays inverter’s operational status.
5-2. Startup Sequence and Standby Status
5-2-1. Once turn on the inverter. The display shows “SR-1000 INVERTER
INITIALIATION..”, then checks the inverter.
Status flow is as follows: