Cotek SK700-112 User manual

SK Series
Pure Sine Wave Inverter
User’s Manual

Table of Contents
1. Important Safety Information.……………………………………………… 1
1-1 General Safety Precautions…………………………………………… 1
1-2 Battery Precautions………………………..………………………….. 1
2. Features………………………………………………………………………...2
2-1 Application………………………………………………………………. 2
2-2 Electrical Performance…………………………………………………3~7
2-3 Mechanical Drawings………………………………………………….. 8~9
3. Introduction……………………………………………………………………10
3-1 Front Panel operation….……………………………………………... 10~13
3-2 Rear Panel operation.………………………………………………… 14~15
3-3 Protections Features…………………………………………………… 15
3-4 Installation………………………………………………………………. 16
3-5 Making DC Wiring Connections ……………………………………... 17~19
3-6 AC Safety Grounding………………………………………………….. 20
3-7 Inverter Operation……………………………………………………… 21
4. Troubleshooting guide………………………………………………………22
5. Maintenance…………………………………………………………………… 23
6. Warranty……………………………………………………………………….. 23

1. Important Safety Instructions
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 not undersized.
Do not operate the Inverter with damaged or substandard Wiring.
1-1-3. There are some components in the inverter can cause arcs and sparks.
To prevent from fire or explosion, do not put batteries, flammable
materials, or anything should be ignition–protected around the inverter.
1-2. Precautions When Working with Batteries
1-2-1. If battery acid contacts skin or clothing, you shall wash it out with soap
and water immediately. If battery acid contacts your eyes, you shall
wash it out with cold running water for at least 20 minutes and get
medical attention immediately.
1-2-2. Never smoke or make a spark or flame in the vicinity of the battery or
the 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 operating with a lead-acid batteries.
Doing so may cause short circuit and very high temperature, which can
melt metal items and even burn you.
WARNING!
Before using the Inverter, read and save the safety
instructions.
1

2. Features
Pure sine wave output (THD < 3%)
Output frequency：50 / 60Hz switch selections
Input & output fully isolated design
Power Saving Mode to conserve energy
High efficiency 89~94%
Driving highly reactive & capacitive loads at start moment
Tri-Color indicators show input voltage & output load level
Loading controlled cooling fan
Advanced microprocessor
Protection：Input low voltage Overload Short circuit
Low battery alarm Input over voltage Over temperature
2-1. Application
2-1-1. Power tools – circular saws, drills, grinders, sanders, buffers, weed
and hedge trimmers, air compressors, etc.
2-1-2. Office equipment – computers, printers, monitors, facsimile machines,
scanner, etc.
2-1-3. Household appliances – vacuum cleaners, fans, fluorescent and
incandescent lights, shavers, sewing machines.
2-1-4. Kitchen appliances – coffee makers, blenders, ice markers, toasters,
etc.
2-1-5. Industrial equipment – metal halide lamp, high – pressure sodium lamp,
etc.
2-1-6. Home entertainment electronics – television, VCRs, video games,
stereos, musical instruments, satellite equipment, etc.
2

2-2. Electrical Performance
SpecificationModel No.
Item SK700-112 SK700-124 SK700-148 SK700-212 SK700-224 SK700-248
W007rewoPtuptuOsuounitnoC
W077rewoPtuptuOmumixaM
W0041).xaM(gnitaRegruS
Input voltage 12V 24V 48V 12V 24V 48V
OutputVoltage 100 / 110 / 120V +/- 5% 220 / 230 / 240V +/- 3%
Frequency
(Switch Selections) 50 / 60Hz +/-0.05%
)%3<DHT(evaWeniSeruPmrofevaWtuptuO
Efficiency (full load) Max. *1 89.0% 91.0% 92.0% 91.0% 93.0% 94.0%
No Load Current Draw (Max.) 1.25A 0.64A 0.31A 1.20A 0.60A 0.28A
Stand-By Current Draw (Max.) 0.25A 0.15A 0.08A 0.25A 0.15A 0.08A
Input Voltage Regulation 10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
InputLevel Indicator
Red / Orange / Green LED
Load Level Indicator
DELdeRrotacidnIeruliaF
Protection Overload, Short Circuit, Reverse Polarity(Fuse),
Over / Under Input Voltage, Over Temperature.
lanoitpO8-RC/6-RCtinUlortnoCetomeR
Safety Cert. Meet UL458 EN60950-1
AssalCCCFCME
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
e-mark
e13 022986
Operating Temperature Range 0 - 40 ℃
℃
℃
Storage Temperature Range -30 to 70
nafgniloocdellortnocgnidaoLgnilooC
Dimensions 273(L)*179(W)*71.5(H)mm / 10.75(L)*7.05(W)*2.81(H) Inch
.sbL4.5/gk7.2thgieW
Note: The specifications are subject to change without notice.
3

SpecificationModel No.
Item SK1000-112 SK1000-124 SK1000-148 SK1000-212 SK1000-224 SK1000-248
W0001rewoPtuptuOsuounitnoC
W0011rewoPtuptuOmumixaM
W0002)xaM(gnitaRegruS
Input voltage 12V 24V 48V 12V 24V 48V
OutputVoltage 100 / 110 / 120V +/- 5% 220 / 230 / 240V +/- 3%
Frequency
(Switch Selectable) 50 / 60Hz +/-0.05%
)%3<DHT(evaWeniSeruPmrofevaWtuptuO
Efficiency (full load) Max. *1 89.0% 92.0% 93.0% 91.0% 94.0% 95.0%
No Load Current Draw (Max.) 1.43A 0.75A 0.38A 1.25A 0.65A 0.35A
Stand-By Current Draw (Max.) 0.25A 0.15A 0.09A 0.25A 0.15A 0.09A
Input Voltage Regulation 10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
InputLevel Indicator
Red / Orange / Green LED
Load Level Indicator
DELdeRrotacidnIeruliaF
Protection Overload, Short Circuit, Reverse Polarity(Fuse),
Over / Under Input Voltage, Over Temperature.
lanoitpO8-RC/6-RCtinUlortnoCetomeR
1-05906NE854LUnoitacifitreCytefaS
AssalCCCFCME
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
e-mark
e13 022694
Operating Temperature Range 0 - 40
Storage Temperature Range -30 to 70
nafgniloocdellortnocgnidaoLgnilooC
Dimensions 340(L)*182(W)*88(H)mm / 13.39(L)*7.17(W)*3.46(H) Inch
.sbL8.8/gk4thgieW
Note: The specifications are subject to change without notice.
4
℃
℃℃

SpecificationModel No.
Item SK1500-112 SK1500-124 SK1500-148 SK1500-212 SK1500-224 SK1500-248
W0051rewoPtuptuOsuounitnoC
W0561rewoPtuptuOmumixaM
W0003)xaM(gnitaRegruS
Input voltage 12V 24V 48V 12V 24V 48V
OutputVoltage 100 / 110 / 120V +/- 5% 220 / 230 / 240V +/- 3%
Frequency
(Switch Selectable) 50 / 60Hz +/-0.05%
)%3<DHT(evaWeniSeruPmrofevaWtuptuO
Efficiency (full load) Max. *1 88.0% 91.0% 92.0% 90.0% 93.0% 94.0%
No Load Current Draw (Max) 1.45A 0.75A 0.40A 1.40A 0.70A 0.40A
Stand-By Current Draw (Max) 0.28A 0.15A 0.09A 0.28A 0.15A 0.09A
Input Voltage Regulation 10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
InputLevel Indicator
Red / Orange / Green LED
Load Level Indicator
DELdeRrotacidnIeruliaF
Protection Overload, Short Circuit, Reverse Polarity(Fuse),
Over / Under Input Voltage, Over Temperature.
lanoitpO8-RC/6-RCtinUlortnoCetomeR
Safety Certification Meet UL458 EN60950-1
AssalCCCFCME
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
e-mark
e13 22876
Operating Temperature Range 0 - 40 ℃
Storage Temperature Range -30℃to 70℃
nafgniloocdellortnocgnidaoLgnilooC
Dimensions 370(L)*191(W)*88(H)mm / 14.57(L)*7.52(W)*3.46(H) Inch
.sbL65.01/gk8.4thgieW
Note: The specifications are subject to change without notice.
5

SpecificationModel No.
Item SK2000-112 SK2000-124 SK2000-148 SK2000-212 SK2000-224 SK2000-248
W0002rewoPtuptuOsuounitnoC
W0022rewoPtuptuOmumixaM
W0004)xaM(gnitaRegruS
Input voltage 12V 24V 48V 12V 24V 48V
OutputVoltage 100 / 110 / 120V +/- 5% 220 / 230 / 240V +/- 3%
Frequency
(Switch Selectable) 50 / 60Hz +/-0.05%
)%3<DHT(evaWeniSeruPmrofevaWtuptuO
Efficiency (full load) Max. *1 89.0% 92.0% 93.0% 91.0% 94.0% 95.0%
No Load Current Draw (Max) 2.8A 1.5A 0.7A 2.64A 1.32A 0.65A
Stand-By Current Draw (Max) 0.60A 0.30A 0.15A 0.60A 0.25A 0.15A
Input Voltage Regulation 10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
InputLevel Indicator
Red / Orange / Green LED
Load Level Indicator
DELdeRrotacidnIeruliaF
Protection Overload, Short Circuit, Reverse Polarity(Fuse),
Over / Under Input Voltage, Over Temperature.
lanoitpO8-RC/6-RCtinUlortnoCetomeR
Safety Certification Meet UL458 EN60950-1
AssalCCCFCME
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
e-mark
e13 22846
Operating Temperature Range 0 - 40 ℃
Storage Temperature Range -30℃to 70℃
CoolingLoading controlled cooling fan ( 65℃ON , 45℃OFF)
Dimensions 368(L)*209(W)*166(H)mm / 14.49(L)*8.23(W)*6.53(H) Inch
.sbL8.91/gk9thgieW
Note: The specifications are subject to change without notice.
6

SpecificationModel No.
Item SK3000-112 SK3000-124 SK3000-148 SK3000-212 SK3000-224 SK3000-248
W0003rewoPtuptuOsuounitnoC
W0033rewoPtuptuOmumixaM
W0006)xaM(gnitaRegruS
Input voltage 12V 24V 48V 12V 24V 48V
OutputVoltage 100 / 110 / 120V +/- 5% 220 / 230 / 240V +/- 3%
Frequency
(Switch Selectable) 50 / 60Hz +/-0.05%
)%3<DHT(evaWeniSeruPmrofevaWtuptuO
Efficiency (full load) Max. *1 88.0% 91.0% 92.0% 90.0% 93.0% 94.0%
No Load Current Draw (Max) 3.0A 1.6A 0.8A 2.8A 1.5A 0.7A
Stand-By Current Draw (Max) 0.55A 0.35A 0.19A 0.55A 0.35A 0.19A
Input Voltage Regulation 10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
InputLevel Indicator
Red / Orange / Green LED
Load Level Indicator
DELdeRrotacidnIeruliaF
Protection Overload, Short Circuit, Reverse Polarity(Fuse),
Over / Under Input Voltage, Over Temperature.
lanoitpO8-RC/6-RCtinUlortnoCetomeR
Safety Cert. Meet UL458 EN60950-1
AssalCCCFCME
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
e-mark
e13 22845
Operating Temperature Range 0 - 40 ℃
Storage Temperature Range -30℃to 70℃
nafgniloocdellortnocgnidaoLgnilooC
Dimensions 398(L)*209(W)*166(H)mm / 15.67(L)*8.23(W)*6.53(H) Inch
.sbL22/gk8.9thgieW
Note: The specifications are subject to change without notice.
*1 : This test condition is normal DC input (13.5V) and Temperature 25℃.
7

2-3. Mechanical Drawings
REMOTE
PORT
CHASSIS
GROUND
SK700273.00 [10.75]
SK1000340.00 [13.39] SK1500370.00 [14.57]
SK70033.5 [1.32]
SK100043.5 [1.71] SK150043.5 [1.71]
196.00 [7.72]
SK700 71.50[2.83]
SK1000 88.00[3.46] SK1500 88.00[3.46]
SK700 179.00[7.05]
SK1000 182.00[7.17]
SK1500 191.00[7.52]
SK700 151.00[594]
SK1000 154.00 [6.06]
SK1500 163.00[6.42]
S3
S2
PWR.
SAV.
I
O
S1
LOAD
LEVEL
INPUT
LEVEL
S4
STATUS
FREQ.
1000W
Pure Sine Wave Power Inverter
POS(+) NEG(-)
DC INPUT
REVERSE POLARITY
WILL DAMAGE UNIT
PURE SINE WAVE INVERTER
AC OUTPUT
ONON
REMOTE
OFF
I
0
8

245.00 [9.65]
56.00 [2.20]
SK2000 368.00 [14.49]
SK3000 398.00 [15.67]
Pure Sine Wave Power Inverter
166.00 [6.53]
209.00 [8.23]
AC OUTPUT
PURE SINE WAVE INVERTER
S4 FREQ.
S2
S1
S3 PWR.
SAV.
O I
0REMO.
LOAD
LEVEL
STATUS
INPUT
LEVEL
OFF
ON
I
177.00 [6.97]
2000W
9

3. Introduction
This power inverter series is one of the most advanced line of mobile AC power
systems.
To get the most effective power inverter, it must be installed and used properly.
Please read the instructions of this manual before you install and operate this
model.
3-1. Front Panel Operations：
3-1-1. Front view：
PURE SINE WAVE INVERTER
AC OUTPUT
OFF
REMOTE
I
0
ON
S1
PWR.
SAV.
O I
INPUT
LEVEL
FREQ.
STATUS
S4
LOAD
LEVEL
S2
S3
SK700
SK1000
SK1500
0
S4
S3
S1
S2
O
SK2000
SK3000
FREQ.
PWR.
SAV.
LOAD
LEVEL
STATUS
INPUT
LEVEL
I
AC OUTPUT
PURE SINE WAVE INVERTER
REMO.
I
ON
OFF
3-1-2. ON / OFF/ REMOTE (Main) switch：
a. Before installing the inverter, you need to ensure the main switch
must be “OFF”.
b. Before using the remote unit, you need to ensure the main switch
must be “ REMOTE”.
10

3-1-3. Input Level：Display Input Voltages
LED Status DC 12V DC 24V DC 48V
RED Slow Blink 10.3~10.6 20.5~21.2 40.8~42.4
RED 10.6~11.0 21.2~21.8 42.4~43.5
ORANGE 11.0~12.1 21.8~24.1 43.5~48.1
GREEN 12.1~14.2 24.1~28.6 48.1~56.3
ORANGE Blink 14.2~15.0 28.6~30.0 56.3~59.6
OVER RED Blink 15.0 30.0 59.6
3-1-4. Load Level：Display AC Loads (Watts)
LED status DARK GREEN ORANGE RED RED BLINK
SK700 0~ 56W 56 ~ 230W 230 ~ 525W 525 ~ 672W Over 672W
SK10000~ 80W 80 ~ 330W 330 ~ 750W 750 ~ 960W Over 960W
SK15000~ 120W 120 ~ 495W 495 ~ 1125W 1125 ~ 1450W Over 1450W
SK20000~ 160W 160 ~ 660W 660 ~ 1500W 1500 ~ 1920W Over 1920W
SK30000~ 240W 240 ~ 990W 990 ~ 2250W 2250 ~ 2880W Over 2880W
3-1-5. AC Frequency：Selected by “S4” Dip Switch
Frequency S4
FFOZH05
NOZH06
11

3-1-6. Status：Display Power & Fault Status
Green LED LED Signal Status
Solid Power OK
Slow Blink Power Saving
Red LED LED Signal Status
PVOknilBtsaF
PVUknilBwolS
Intermittent Blink OTP
PLOdiloS
3-1-7. Power Saving Mode: Power Saving Mode is adjustable and
set by the Dip Switches, S1, S2 and S3 on the front panel.
Example: With the watt setting at 15W, a 15W↑load will make the
inverter operate normally, a 15W↓load will enter into the Power
saving mode.
SK700SK1000
SK1500
SK2000
SK3000 S1 S2 S3
DISABLE DISABLE DISABLE OFF OFF OFF
15W 20W 40W ON OFF OFF
25W 40W 80W OFF ON OFF
40W 55W 125W ON ON OFF
50W 75W 170W OFF OFF ON
65W 95W 210W ON OFF ON
75W 115W 245W OFF ON ON
85W 135W 280W ON ON ON
12

3-1-8. AC outlets (available):
Australia / New Zealand
IEC-2
Universal
HARD WIRE
United Kingldom
IEC-1
North America (GFCI)
NEMA 5-15R
NEMA 5-20R
Continental European
13

3-2. Rear Panel Operations：
SK700
SK1000
SK1500
3-2-1. Remote Port:
The SK Series Inverter is compatible with any of the remote controllers,
CR-6, CR-7 or CR-8.
Before using the remote unit, you need to ensure the main switch is in
the “ REMOTE” position and the input voltage of the power inverter is
the same as it of the remote unit.
3-2-2. Fan Ventilation:
Be sure to keep it a distance (at least 1 inch) form surrounding things.
SK2000
SK3000
14
REMOTE
PORT
CHASSIS
GROUND
NEG(-)
POS(+)
WARNING:
DC INPUT
REVERSE POLARITY
WILL DAMAGE UNIT
SHOCK HAZARD.
DO NOT OPEN. NO
USER SERVICEABLE
PARTS INSIDE.
POS(+) NEG(-)
DC INPUT
REVERSE POLARITY
WILL DAMAGE UNIT
REMOTE
PORT
CHASSIS
GROUND

3-2-3. DC Input Terminal：
Connect DC input terminal to 12V / 24V / 48V battery or the other
power sources.
【＋】represents positive, and【－】represents negative. Reverse
polarity connection will blow the internal fuse and may damage the
inverter permanently.
Model DC Input Voltage
Minimum Maximum
12 V 10.5 15.0
24 V 21.0 30.0
48 V 42.0 60.0
3-2-4. Use wire # 8 AWG to connect Chassis ground with vehicle chassis.
3-3. ProtectionsFeatures:
Model
DC Input (VDC) Over Temperature Protection
Over Voltage Under
Voltage
Alarm
Under
Voltage INTERIOR HEAT SINK
Shut-
down Restart Shut- down Restart Shut- down Restart Shut- down Restart
12 V 15.3V 14.3V 11.0V 10.2V 12.7V
70℃45℃90℃60℃
24 V 30.6V 28.6V 22.0V 20.3V 25.2V
48V 61.0V 57.2V 44.0V 40.8V 49.7V
WARNING!
Operating the inverter without a proper ground
Connection may cause an electrical hazard.
15

3-4. Installation：
The power inverter should be installed in an environment that meets the
following requirements：
3-4-1. Dry – Do not allow water to drip on or enter into the inverter.
3-4-2. Cool – Ambient air temperature should be between 0℃and 40℃, the
cooler the better.
3-4-3. Safe – Do not install the inverter in a battery compartment or other
areas where flammable fumes may exist, such as fuel storage areas or
engine compartments.
3-4-4. Ventilated –Keep the inverter a distance (as least 1 inch) away from
surrounding things. Ensure the ventilation shafts on the rear and the
bottom of the unit are not obstructed.
3-4-5. Dust – Do not install the Inverter in a dusty environments
The dust can be inhaled into the unit when the cooling fan is working.
3-4-6. Close to batteries – Avoid excessive cable lengths. Do not install the
Inverter in the same compartment as batteries.
Use the recommended wire lengths and sizes (see section 3-5).
Do not mount the Inverter where it will be 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.
16

3-5. DC Wiring Connections：
Follow this procedure to connect the battery cables to the DC input terminals
of the Inverter. The cables should be as short as possible (less than 10 feet
/ 3 meters ideally) and large enough to handle the required current in
accordance with the electrical codes or regulations applicable to the
installation.
Cables that are not an adequate gauge (too narrow) or too long will
deteriorate inverter performance such as poor surge capability and frequent
low-input voltage warnings and shutdowns.
These low input voltage warnings are due to DC voltage drop across the
cables from the inverter to the batteries.
The longer and narrower the cables, the greater the voltage drop.
Increasing DC cable size helps improve the situation.
COTEK recommends the following cables for optimum inverter performance.
(Apply both 120V and 230V versions )
Model No Wire AWG Inline Fuse
SK700-112 / 212 # 4 100 A
SK700-124 / 224 # 6 50 A
A038#842/841-007KS
SK1000-112 / 212 # 2 150 A
A084#422/421-0001KS
SK1000-148 / 248 # 6 40 A
SK1500-112 / 212 # 2 200 A
SK1500-124 / 224 # 4 100 A
A056#842/841-0051KS
SK2000-112 / 212 # 2/0 250 A
SK2000-124 / 224 # 1/0 125 A
SK2000-148 / 248 # 2 70 A
SK3000-112 / 212 # 4/0 400 A
SK3000-124 / 224 # 2/0 200 A
SK3000-148 / 248 # 1/0 100 A
17

3-5-1. Connect the cables to the power input terminals on the rear panel of
the inverter. The red terminal is represents positive (+) and black
terminal represents negative (-). Insert the cables into the terminals
and tighten the screw to clamp the wires securely.
Also, use only high quality copper wire and keep cable length short, a
maximum of 3 - 6 feet.
WARNING!
The installation of a fuse must be on a 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.
WARNING!
Ensure all the DC connections are tight (torque
to 9 – 10 ft-lbs, 11.7 – 13 Nm). Loose connections
may cause overheat and fire.
Battery to inverter cable connection
Do not placeanything between
battery cable lug and terminal surface.
Assemble exactly as shown.
18
M8 SCREW
RING TERMINAL
PVC WIRE
AWG#2-#6