Matrix Software e13 User Manual

ST Series

Pure Sine Wave

Power Inverter

User ’s Manual

e13

Contents

1.

Important Safety Instructions…………………………………………………………………….

2
1-1 General safety precautions…………………………………………………………………… 2
1-2 Precautions when working with Batteries…………………………………………………… 2

2.

Functional Characteristics.……………………………………………………………………….

3
2-1 General Information…………………………………………………………………………. 3
2-2 Application……………………………………………………………………………………. 3
2-3 Features………………………………………………………………………………………. 3
2-4 Electrical Performance………………………………………………………………………. 5
2-5 Mechanical drawings………………………………………………………………………... 6

3.

Installation……………………………………………………………………………………………

7
3-1 Where to install………………………………………………………………………………. 7
3-2 Hard-wire Installation………………………………………………………………………... 8
3-3 DC Wiring Connections………….…………………………………………………………. 9

4.

Introduction………………………………………………………………………………………….

11
4-1 Inverter Operation……………………………………………………………………………... 11

4-2 Front Panel Operation.……………………………………………………………………….. 12
4-3 Protection Features….……………………………………………………………………….. 16

4-4 Rear Panel Operation.……………………………………………………………………….. 17
5

Information…………………………………………………………………………………………..

17
5-1 Troubleshooting…………………….……………………………….…………………………. 17

5-2 Maintenance………………………………………………………..………………………….. 18
5-3 Warranty………………………………………………………………………………………... 18

6. Appendices…………………………………………………………………………………………..

19
6-1 FCC (Class A) Declaration of Conformity………………………………………………… 19
6-2 CE (LVD EN60950) Declaration of Conformity…………………………………………... 20

6-3 e-mark (e13) Declaration of Conformity…………………………………………………..
6-4 UL (UL458) NOTICE OF COMPLETION….……………………………………………...

©Copyright :This manual is the copyright of COTEK Electronic lnd. Co., Ltd. And may not be reproduced or copiedwithout

the express permission of the owner.

21

22

1

1. Important Safety Instructions

WARNING !

Before using the Inverter, read and save the safety

1-1. General Safety Precautions

1-1-1. Do not expose the Inverter to rain, snow, spray, bilge or dust.

To reduce risk of hazard, do not cover or obstruct the ventilation
openings. Do not install the Inverter in a zero-clearance
compartment. Overheating may result.

1-1-2. To avoid a risk of fire and electronic shock. Make sure that existing

wiring is in good electrical condition; and that wire size is not
undersized.
Do not operate the Inverter with damaged or substandard wiring.

instructions.

1-1-3. This equipment contains components which can produce arcs or

sparks. To prevent fire or explosion do not install in compartments
containing batteries or flammable materials or in locations which
require ignition protected equipment. This includes any space
containing gasoline-powered machinery, fuel tanks, or joints, fittings,
or other connection between components of the fuel system.

1-2. Precautions When Working with Batteries

1-2-1. If battery acid contacts skin or clothing, wash immediately with soap

and water. If acid enters eye, immediately flood eye with running
cold water for at least 20 minutes and get medical attention
immediately.

1-2-2. Never smoke or allow a spark or flame in vicinity of battery or

engine.

1-2-3. Do not drop a metal tool on the battery. The resulting spark or

short-circuit on the battery of other electrical part may cause an
explosion.

1-2-4. Remove personal metal items such as rings, bracelets, necklaces,

and watches when working with a lead-acid battery.
A lead-acid battery produces a short-circuit current high enough to
weld a ring or the like to metal, causing a severe burn.

2

2. Functional Characteristics

2-1. General Information

ST-series completes with stand –alone power inverter with AC transfer
switch and is suitable for RV, Marin and Emergency appliances.
When utility AC power cutoff, the transfer relay is de-energized and the
load is automatically transferred to the Inverter output. Once the AC utility
is restored, the relay is energized and the load is automatically
reconnected to AC utility.

This power inverter series is a member of the most advanced line of mobile AC power systems available.

To get the most out of the power inverter, it must be installed and used properly. Please read the instructions in this manual before installation and operation this model.

2-2. Application

2-2-1

2-2-2.

2-2-3.

2-2-4.
2-2-5
2-2-6.

Power tools–circular saws, drills, grinders, sanders, buffers, weed and
hedge trimmers, air compressors.

Office equipment – computers, printers, monitors, facsimile machines,
scanners.

Household items – vacuum cleaners, fans, fluorescent and incandescent
lights, shavers, sewing machines.

Kitchen appliances – coffee makers, blenders, ice markers, toasters.
Industrial equipment – metal halide lamp, high – pressure sodium lamp.
Home entertainment electronics – television, VCRs, video games,

stereos, musical instruments, satellite equipment.

2-3. Features

2-3-1.

2-3-2.
2-3-3.

Pure sine wave output (THD < 3%) to operate higher-end electronic
Equipments.

Output frequency：50 / 60Hz switch selectable
Built in 16A or 25A rating transfer switch.

3

2-3-4.

Speed up transfer time and synchronized operation with the AC source
at all times that allows the transfer to be interruption-free for sensitive

equipments.

2-3-5.
2-3-6.
2-3-7.
2-3-8.
2-3-9.
2-3-10.

Built in advance microprocessor to make friendly interface with user.
Low power “ Power Saving Mode “ to conserve energy
Capable of driving highly reactive & capacitive loads at start moment.
Hardwire AC connection model option.
Loading controlled cooling fan.
Smart remote controller.

2-3-11. 3 LED indicators with tri-color display all operation status.
2-3-12. High efficiency 88 ~ 93%.
2-3-13. Protection:

Input over voltage and Input low voltage protection.
Low battery alarm
Over temperature protection.
Over load protection
Short Circuit protection

Reverse polarity protection.
AC circuit breaker (6Amp to 30Amp)

4

2-4. Electrical Performance

Specification Model No.

Item

Continuous Output Power 1000W

Maximum Output Power (3Min.) 1150W

Surge Rating 2000W
Input Voltage 12V 24V 48V 12V 24V 48V

Output Voltage

Frequency

(Switch Selectable)

Output Waveform Pure Sine Wave (THD < 3%)

Efficiency (full load) 88% 91% 92% 90% 93% 94%

No Load Current Draw 1.43A 0.75A 0.38A 1.25A 0.65A 0.35A

Stand-By Current Draw 0.25A 0.15A 0.09A 0.25A 0.15A 0.09A

Input Voltage Regulation

Input Level Indicator
Load Level Indicator

ST1000-112 ST1000-124 ST1000-148 ST1000-212 ST1000-224 ST1000-248

100 / 110 / 120V ± 3% 220 / 230 / 240V ± 3%

50 / 60Hz +/- 0.05%

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Red / Orange / Green LED

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Failure Indicator Red LED

Protection

Circuit Breaker 12 Amp 6 Amp

Remote Control Unit CR6 / CR7 / CR8 Optional

Synchronous AC transfer YES

Transfer switch 16 Amp

Transfer Time 4~8 msec.

Safety Meet UL458 Meet EN60950-1

EMC FCC Class A

Operating Temperature Range

Storage Temperature Range

Cooling Loading controlled cooling fan

Dimensions 373(L)*236(W)*115(H) mm / 14.7(L)*9.29(W)*4.53(H) Inch

Overload, Short Circuit, Reverse Polarity (Fuse),Over Temperature

Over/Under Input Voltage, AC Input Circuit Breaker

EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995

0 - 40℃

-30℃ to 70℃

e-Mark
022967

Weight 6.2 kgs. / 13.6 Lbs.

Note: The specifications are subject to change without notice.

5

2-4. Electrical Performance

Specification Model No.

Item

Continuous Output Power 1500W

Maximum Output Power (3Min.) 1725W

Surge Rating 3000W
Input Voltage 12V 24V 48V 12V 24V 48V

Output Voltage

Frequency

(Switch Selectable)

Output Waveform Pure Sine Wave (THD < 3%)

Efficiency (full load) 88% 91% 92% 90% 93% 94%

No Load Current Draw 1.45A 0.75A 0.40A 1.40A 0.70A 0.40A

Stand-By Current Draw 0.28A 0.15A 0.09A 0.28A 0.15A 0.09A

Input Voltage Regulation

Input Level Indicator
Load Level Indicator

ST1500-112 ST1500-124 ST1500-148 ST1500-212 ST1500-224 ST1500-248

100 / 110 / 120V ± 3% 220 / 230 / 240V ± 3%

50 / 60Hz +/- 0.05%

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Red / Orange / Green LED

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Failure Indicator Red LED

Protection

Circuit Breaker 16 Amp 10 Amp

Remote Control Unit CR6 / CR7 / CR8 Optional

Synchronous AC transfer YES

Transfer switch 25 Amp 16 Amp

Transfer Time 4~8 msec.

Safety Meet UL458 Meet EN60950-1

EMC FCC Class A

Operating Temperature Range

Storage Temperature Range

Cooling Loading controlled cooling fan

Dimensions 403(L)*236(W)*115(H) mm / 15.9(L)*9.29(W)*4.53(H) Inch

Overload, Short Circuit, Reverse Polarity (Fuse),Over Temperature

Over/Under Input Voltage, AC Input Circuit Breaker

EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995

0 - 40℃

-30℃ to 70℃

Meet

e-Mark

Weight 7.0 kgs. / 15.4 Lbs.

Note: The specifications are subject to change without notice.

6

2-4. Electrical Performance

Specification Model No.

Item

Continuous Output Power 2000W

Maximum Output Power (3Min.) 2300W

Surge Rating 4000W
Input Voltage 12V 24V 48V 12V 24V 48V

Output Voltage

Frequency

(Switch Selectable)

Output Waveform Pure Sine Wave (THD < 3%)

Efficiency (full load) 88% 91% 92% 90% 93% 94%

No Load Current Draw 2.6A 1.50A 0.70A 2.3A 1.1A 0.65A

Stand-By Current Draw 0.60A 0.30A 0.2A 0.60A 0.3A 0.15A

Input Voltage Regulation

Input Level Indicator
Load Level Indicator

ST2000-112 ST2000-124 ST2000-148 ST2000-212 ST2000-224 ST2000-248

100 / 110 / 120V ± 3% 220 / 230 / 240V ± 3%

50 / 60Hz +/- 0.05%

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Red / Orange / Green LED

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Failure Indicator Red LED

Protection

Circuit Breaker 25 Amp 12 Amp

Remote Control Unit CR6 / CR7 / CR8 Optional

Synchronous AC transfer YES

Transfer switch 25 Amp 16 Amp

Transfer Time 4~8 msec.

Safety Certification Meet UL458 Meet EN60950-1

EMC FCC Class A

Operating Temperature Range

Storage Temperature Range

Cooling Loading controlled cooling fan

Dimensions 433(L)*332(W)*115(H) mm / 17(L)*13(W)*4.53(H) Inch

Overload, Short Circuit, Reverse Polarity (Fuse),Over Temperature

Over/Under Input Voltage, AC Input Circuit Breaker

EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995

0 - 40℃

-30℃ to 70℃

Meet

e-Mark

Weight 11.2 kgs. / 24.6 Lbs.

Note: The specifications are subject to change without notice.

7

2-4. Electrical Performance

Specification Model No.

Item

Continuous Output Power 2500W

Maximum Output Power (3Min.) 2875W

Surge Rating 5000W
Input Voltage 12V 24V 48V 12V 24V 48V

Output Voltage

Frequency

(Switch Selectable)

Output Waveform Pure Sine Wave (THD < 3%)

Efficiency (full load) 88% 91% 92% 90% 93% 94%

No Load Current Draw 2.35A 1.3A 0.7A 2.4A 1.5A 0.65A

Stand-By Current Draw 0.5A 0.35A 0.19A 0.6A 0.35A 0.19A

Input Voltage Regulation

Input Level Indicator
Load Level Indicator

ST2500-112 ST2500-124 ST2500-148 ST2500-212 ST2500-224 ST2500-248

100 / 110 / 120V ± 3% 220 / 230 / 240V ± 3%

50 / 60Hz +/- 0.05%

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Red / Orange / Green LED

10.5-15
VDC

21.0-30
VDC

42.0-60
VDC

Failure Indicator Red LED

Protection

Circuit Breaker 30 Amp 16 Amp

Remote Control Unit CR6 / CR7 / CR8 Optional

Synchronous AC transfer YES

Transfer switch 25 Amp

Transfer Time 4~8 msec.

Safety Certification Meet UL458 Meet EN60950-1

EMC FCC Class A

Operating Temperature Range

Storage Temperature Range

Cooling Loading controlled cooling fan

Dimensions 463(L)*332(W)*115(H) mm / 18.2(L)*13(W)*4.53(H) Inch

Overload, Short Circuit, Reverse Polarity (Fuse),Over Temperature

Over/Under Input Voltage, AC Input Circuit Breaker

EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995

0 - 40℃

-30℃ to 70℃

Meet

e-Mark

Weight 12 kgs. / 26.4 Lbs.

Note: The specifications are subject to change without notice.

8

2-5. Mechanical drawings

ST1000 373.00 [14.69]

ST1500 403.00 [15.87]

AC INPUT

DC INPUT

NEG(-)

REVERSE POLARITY
WILL DAMAGE UNIT

BREAKER

POS(+)

POWER

0
1

1

STATUS
INPUT

LEVEL

S4S3S2S

LOAD
LEVEL

REMOTE

PORT

POWER

I

ON-OFF-REMOTE

0

9

2-5. Mechanical drawings

ST2000 433.00 [17.05]

ST2500 463.00 [18.23]

WARNING: REVERSE POLARI TY WILL DAMAGE UNIT

DC INPUT

POS(+) NEG(-)

AC INPUT

BREAKER

POWER

0
1

S1S2S3S

STATUS
INPUT

LEVEL
LOAD

4

LEVEL

REMOTE

PORT

POWER

I

ON-OFF-REMOTE

0

10

3. Installation

3-1.Where to install

The power inverter should be installed in a location that meets the following
requirements:

3-1-1. Dry – Do not allow water to drip or splash on the inverter.
3-1-2.

Cool – Ambient air temperature should be between 0℃ and 40℃,
the cooler the better.

3-1-3. Safety – Do not install batteries in compartment or other areas

where flammable fumes existence such as fuel storage areas or
engine compartments.

3-1-4. Ventilated – Allow at least one inch of clearance around the

Inverter for air flow. Ensure the ventilation shafts on the rear

and bottom of the unit are not obstructed.

3-1-5. Dust-free – Do not install the Inverter in a dusty environments

where dust, wood particles or other filings/shavings are
present. The dust can be pulled into the unit when the cooling fan is
operation.

3-1-6. Close to batteries – Avoid excessive cable lengths but do not install

the inverter in the same compartment as batteries.
Use the recommended wire lengths and sizes (see section 4-3).
Do not mount the inverter at the place where it is exposed to the
gases produced by the battery.
These gases are very corrosive and prolonged exposure will
damage the inverter.

WARNING!

Shock Hazard. Before proceeding further, carefully

check that the inverter is NOT connected to any
batteries, and that all wiring is disconnected from any
electrical sources . Do not connect the output terminals
of the inverter to an incoming AC source.

11

3-2 Hard-wire Installation

AC wiring connections:

3-2-1. The AC wiring compartment is located on the front panel of the

ST series. Remove the AC wiring compartment cover to gain
access to the AC terminal.

WARNING!

Before you connect AC wiring to the terminals of compartment
cover, ensure to check the label in the compartment for
correct connections. Wrong connection will damage the
inverter.

12

3-2-2. Connect AC output and AC input wiring to the ST series

terminals. Please take the following information as your reference.

Wire length / gauge

Terminal Wire color

ST1000&ST1500 ST2000&ST2500

AC

OUTPUT

AC

INPUT

Ground

Line (L) Black

Neutral (N) White

Line (L) Brown

Neutral (N) Blue

Green /

Yellow or

Within 16 feet / AWG#

14~16

26~32 feet / AWG#

12~14

Within 16 feet / AWG#

10 ~12

26~32 feet / AWG#

8 ~10

Bare copper

3-2-3. Please double check and review all connections to ensure

DC INPUT

NEG(-)

REVERSE POLARITY
WILL DAMAGE UNIT

3-2-4.

POS(+)

the wires are in correct terminals and the connections are tight.

Before connecting AC output and AC input terminals of the ST series,

you can either use front compartment cover or a side hole to coil out.
Both AC input and AC output are coiled out from the front compartment
cover when in production. If you want to change the position, you
should open the top cover first, and then switch the wire of the front
compartment cover and the plastic cover of the side of top cover.

ST1000

AC INPUT

BREAKER

0
1

S4S3S2S

1

POWER
STATUS

INPUT
LEVEL

LOAD
LEVEL

REMOTE

PORT

POWER

I

ON-OFF-REMOTE

0

ST1500

13

ST2000
ST2500

WARNING: REVERSE POLARITY WILL DAMAGE UNIT

POS(+) NEG(-)

DC INPUT

AC INPUT

BREAKER

0
1

S1S2S3S

4

POWER
STATUS

INPUT
LEVEL

LOAD
LEVEL

REMOTE

PORT

POWER

I

0

ON-OFF-REMOTE

3-3 DC Wiring Connections

Follow the instructions to connect the battery cables to DC input terminals of
the Inverter. The cable should be as short as possible (less than 6 feet / 1.8
meters ideally) so that it can handle the required current in accordance with
the electrical codes or regulations application. Inappropriate length of cables
will deteriorate the inverter performance such as poor surge capability,
frequent low-input voltage warnings, and shutdown. UVP warning occurs
when DC voltage drops across the cables from the inverter to the batteries.
The longer or narrower the cables, the more the voltage drop.

Increasing your DC cable size will help improve the situation.
The following recommended cables are for the best performance of the
inverter. (Apply both 120V and 230V versions)

14

Model No Wire AWG Inline Fuse

ST1000-112 / 212 # 2 150 A
ST1000-124 / 224 # 4 80 A
ST1000-148 / 248 # 6 40 A
ST1500-112 / 212 # 2 200 A
ST1500-124 / 224 # 4 100 A
ST1500-148 / 248 # 6 50 A
ST2000-112 / 212 # 2/0 250 A
ST2000-124 / 224 # 1/0 125 A
ST2000-148 / 248 # 2 70A
ST2500-112 / 212 # 4/0 400 A
ST2500-124 / 224 # 2/0 200 A
ST2500-148 / 248 # 1/0 100 A

3-3-1. Connect the cables to the power input terminals on the front panel of

the inverter. The red terminal is positive (+) and black terminal is
negative (-). Insert the cables into the terminals and tighten screw to
clamp the wires securely.

WARNING!

Make sure all the DC connections are tight (torque
to 9 – 10 ft-lbs, 11.7 – 13 Nm). Loose connections
could result overheat in a potential hazard.

WARNING!

The installation of a fuse must be on positive cable.
Failure to place a fuse on “+” cables running between
the inverter and battery may cause damage to the
inverter and will void warranty.

Also, only use high quality copper wire and keep the cable length short which
is a maximum of 3 - 6 feet.

15

AWG#2 - #6

ST-1000
ST-1500

N

E

G

(

-

)

P

O

S

(

+

)

INLINE FUSE

16

WASHER

SPRING WASHER

M8 NUT

RING TERMINAL

PLASTIC COVER

PVC WIRE

ST2000
ST2500

INLINE FUSE

RING TERMINAL
WASHER
SPRING WASHER

M8 NUT

Append: The holes on red/black plastic

cover of DC input terminal are
on top when in production.
The user can change them to
the bottom if necessary.

AC INPUT

REVERSE POLARITY WILL DAMAGE UNIT

WARNING:

DC INPUT

NEG(-)POS(+)

BREAKER

POWER

POWER

STATUS

0

INPUT
LEVEL

1

S4S3S2S

1

I

LOAD
LEVEL

0

REMOTE
PORT

ON-OFF-REMOTE

17

4. Introduction:

4-1.Inverter Operation

Switch the power ON, then the power inverter is ready to supply AC power to
the loads. Turn on the loads separately after the inverter is ON to prevent
OVP status caused by the surge power.

4-1-1. Switch the power ON, then the buzzer will send out beep sound. At the

moment, the inverter is doing self-diagnosis. Then the LED’s indicators
will also show various colors.

Finally, the buzzer will send out another beep, and the Input Level and
Status LED indicators will turn green. Then the inverter will start to
work.

4-1-2. Switch the power OFF, then the inverter stops and all the lights that are

On will go Off.

4-1-3. Switch the power inverter and the test load ON, then the inverter will

supply the power to the load. If you want to measure true RMS voltage
output of the inverter, a meter such as FLUKE 45 BECKMAN 4410 or
TRIPLETT 4200 must be used.

4-2. Front Panel Operation

4-2-1. Front view：

DC INPUT

NEG(-)

POS(+)

AC INPUT

BREAKER

0
1

S4S3S2S

1

POWER
STATUS

INPUT
LEVEL

LOAD
LEVEL

REMOTE

PORT

POWER

I

ON-OFF-REMOTE

0

REVERSE POLARITY
WILL DAMAGE UNIT

18

4-2-3. AC input Circuit Breaker:

WARNING: REVERSE POLARITY WILL DAMAGE UNIT

DC INPUT

POS(+) NEG(-)

AC INPUT

BREAKER

0
1

S1S2S3S

4

POWER
STATUS

INPUT
LEVEL

LOAD
LEVEL

REMOTE

4-2-2. Power ON / OFF / REMOTE (Main) switch:

a. Before installing the inverter, you need to ensure the main switch

is in the OFF position.

b. Before using the remote unit, you need to ensure the main switch

is in the REMOTE position.

The AC input circuit breaker protects the model from overload.
When an overload condition exists, the circuit breaker stops to supply
output AC grid power. To reset it, push the circuit breaker switch
then the model will be back in normal operation. The source fault
should be corrected before you reset it.

POWER

I

0

ON-OFF-REMOTE

PORT

4-2-4. Remote Port:

The ST Series Inverter is compatible with any of these remote

controllers: CR-6, CR-7 or CR-8.

4-2-5. DC Input Terminals:

Connect DC input terminals to 12V / 24V / 48V battery or other
power sources.
[ + ] represents positive, [ - ] represents negative. Reverse polarity
connection can blow the internal fuse and may damage the inverter
permanently.

DC Input Voltage

Model

Minimum Maximum

12V 10.5V 15.0V
24V 21.0V 30.0V

48V 42.0V 60.0V

19

4-2-6. Chassis Ground: Connect the wire # 8 AWG to vehicle chassis.

WARNING!

Operating the inverter without a proper ground
connection may cause electrical safety hazard.

4-2-7. DC Input Level：Display Input Voltages

LED Status DC 12V DC 24V DC 48V

RED Blink (slow) 10.5~10.9 21.0~21.8 42.0~43.6

RED 10.9~11.3 21.8~22.6 43.6~45.2

ORANGE 11.3~12.0 22.6~24.0 45.2~48.0

GREEN 12.0~14.0 24.0~28.0 48.0~56.0

ORANGE Blink 14.0~14.7 28.0~29.4 56.0~58.8

OVER RED BLINK 14.7q 29.4q 58.8q

4-2-8. AC Input Level：Display Input Status

LED Status AC Input

ORANGE OFF

GREEN ON

4-2-9. Load Level：Display AC Loads (Watts)

LED Status DARK GREEN ORANGE RED

ST1000
ST1500
ST2000
ST2500

0 ~ 50W 50 ~ 330W 330 ~ 750W 750 ~ 960W Over 960W

0 ~ 75W 75 ~ 495W 495 ~ 1125W 1125 ~ 1450W Over 1450W
0 ~ 100W 100 ~ 660W 660 ~ 1500W 1500 ~ 1920W Over 1920W
0 ~ 125W 125 ~ 825W 825 ~ 1875W 1875 ~ 2390W Over 2390W

BLINKING

RED

20

4-2-10. AC Frequency：Selected by “S4” Dip Switch

Frequency S4

50 HZ OFF

60 HZ ON

4-2-11. Status：Display Power & Fault Status

Green LED LED Signal Status

Solid Power OK

Slow Blink Power Saving

Red LED LED Signal Status

Fast Blink OVP

Slow Blink UVP

Intermittent Blink

Solid OLP

     

OTP

4-2-12. Power Saving Mode: Power Saving Mode is adjustable and

set by the Dip Switches, S1, S2 and S3 on the front panel.

Example: The load should be set above15W. If the load is below15W,
the power saving mode will be activated.

21

ST1000
ST1500

ST2000
ST2500

DISABLE DISABLE OFF OFF OFF

20W 40W ON OFF OFF
40W 80W OFF ON OFF
50W 100W ON ON OFF
60W 120W OFF OFF ON
80W 160W ON OFF ON
90W 180W OFF ON ON

110W 220W ON ON ON

4-3.Protections Features

S1 S2 S3

Model

Over Voltage Under Voltage INTERIOR HEAT SINK

Shut­down

DC Input (VDC) Over Temperature Protection

Under

Restart

Voltage

Alarm

Shut­down

Restart Shut-

12V 15.3 14.2 11.0 10.5 12.5
24V 30.6 28.4 22.0 21.0 25.0
48V 61.2 56.8 44.0 42.0 50.0

down

Restart Shut-

down

Restart

70℃ 45℃ 90℃ 60℃

22

4-4. Rear Panel Operation

4-4-1. Rear view：

4-4-2. Fan Ventilation:

Be sure to keep it a distance (at least 1 inch) form surrounding things.

5. Information

5-1. Troubleshooting

WARNING

Do not open or disassemble the ST series Inverter.

Attempting to service the unit may cause the risk of
electrical shock or fire.

23

Problems and
Symptoms Possible Cause Solutions

No AC Power “Output”
STATUS illuminates the LED

a. Power status light is

blinking fast.

Over input voltage.
(OVP)

Check input voltage
Reduce input voltage.

b. Power status light is

Blinking slowly.

c. Power status light is

blinking Intermittently.

Low input voltage.
(UVP)

Thermal shutdown.
(OTP)

Recharge battery.
Check connections
and cables.

Improve ventilation.
Make sure ventilation,
shafts of the inverter
are not obstructed.
Lower ambient
temperature.

d. Power status light is

glowed steadily.

Short circuit.
Wiring error.

Over Loading (OLP)

Check AC wiring
for short circuit.
Reduce load.

5-2. Maintenance

Very little maintenance is required to keep your inverter operating properly.
You should clean the exterior of the unit periodically with a damp cloth to pre­vent accumulation of dust and dirt. At the same time, tighten the screws on the
DC input terminals.

5-3. Warranty

We guarantee this product against defects in materials and workmanship for
a period of 24 months from the date of purchase and will repair or replace
any defective power inverters if you directly returned them to us with
postage paid.
Please note that Cotek is only responsible for ensuring our products are
operational before delivering. This warranty will be considered void if the
unit has been misused, altered, or accidentally damaged. Cotek is not liable
for anything that occurs as a result of the user’s fault.

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