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
2-3
Mechanical Drawings…………………………………………………..
8
3.
Introduction……………………………………………………….……………
10
3-1
Front Panel ….…………………………………………………………..
10
3-2
Rear Panel.………………………………………………………………
14
3-3
Protections Features……………………………………………………
15
3-4
Installation……………………………………………………………….
16
3-5
DC Wiring Connections ………………………………………………..
17
3-6
AC Safety Grounding…………………………………………………..
20
3-7
Inverter Operation………………………………………………………
21
4.
Troubleshooting…………………………………….…………………………
22
5.
Maintenance……………………………………………………………………
23
6.
Warranty………………………………………………………………………..
23

1. Important Safety Information
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. Battery Precautions
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
1

2. Features
DC input socket availability is suitable for different user scenarios
Power ON / OFF remote control
E13 / CE / FCC approved
Pure sine wave output (THD < 3%)
Output frequency 50 / 60Hz selectable by DIP switch
Input & output fully isolation
Power Saving Mode to save energy (except SK200 and SK350)
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
Input Protection: Reverse Polarity (Fuse)/ Under Voltage/ Over Voltage
Output Protection: Short circuit/ Overload/ 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
Specification
Model No.
Item
SK700-112
SK700-124
SK700-148
SK700-212
SK700-224
SK700-248
Rated Power
700W
Surge Power
Load 101 ~ 115% (3min.)
1400W (3 sec; resistive)
Input voltage
12V
24V
48V
12V
24V
48V
Output Voltage
100 / 110 / 120V +/- 5%
220 / 230 / 240V +/- 3%
Frequency
50 / 60Hz +/- 0.05% selectable by DIP switch
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (Typ.) *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 Range
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Input Level Indicator
Red / Orange / Green LED
Load Level Indicator
Failure Indicator
Red LED
Protection
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
Remote Control Unit
CR-6 / CR-8 Optional
Safety Standards
Certified UL/cUL 458
(SK700-148 only meet UL 458)
Certified EN 60950-1
EMC
FCC Class A
Certified EN 55022; EN 55024;
EN 61000-3-2; EN 61000-3-3
EN 61000-4-2, 3, 4, 5, 6, 8, 11
E13 mark
Operating Temperature Range
0 ~ +40 ℃
Storage Temperature Range
-30℃~ +70℃
Cooling
Loading controlled cooling fan
Dimension (WxHxD)
179x72x273 mm / 7.047x2.835x10.748 inch
Weight
3.4kg / 7.49Lbs.
Note: The specifications are subject to change without notice.
3

Specification
Model No.
Item
SK1000-112
SK1000-124
SK1000-148
SK1000-212
SK1000-224
SK1000-248
Rated Power
1000W
Surge Power
Load 101 ~ 115% (3min.)
2000W (3 sec; resistive)
Input voltage
12V
24V
48V
12V
24V
48V
Output Voltage
100 / 110 / 120V +/- 5%
220 / 230 / 240V +/- 3%
Frequency
50 / 60Hz +/- 0.05% (Selectable by DIP switch)
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (Typ.) *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 Range
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Input Level Indicator
Red / Orange / Green LED
Load Level Indicator
Failure Indicator
Red LED
Protection
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
Remote Control Unit
CR-6 / CR-8 Optional
Safety Standards
Certified UL/cUL 458
(SK1000-148 only meet UL 458)
Certified EN 60950-1
EMC
FCC Class A
Certified EN 55022; EN 55024;
EN 61000-3-2; EN 61000-3-3
EN 61000-4-2, 3, 4, 5, 6, 8, 11
E13 mark
Operating Temperature Range
0 ~ +40 ℃
Storage Temperature Range
-30℃~ +70℃
Cooling
Loading controlled cooling fan
Dimension (WxHxD)
182x88.5x340 mm / 7.165x3.484x13.386 inch
Weight
4.8kg / 10.58Lbs.
Note: The specifications are subject to change without notice.
4

Specification
Model No.
Item
SK1500-112
SK1500-124
SK1500-148
SK1500-212
SK1500-224
SK1500-248
Rated Power
1500W
Surge Power
Load 101 ~ 115% (3min.)
3000W (3 sec; resistive)
Input voltage
12V
24V
48V
12V
24V
48V
Output Voltage
100 / 110 / 120V +/- 5%
220 / 230 / 240V +/- 3%
Frequency
50 / 60Hz +/- 0.05% (Selectable by DIP switch)
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (Typ.) *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 Range
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Input Level Indicator
Red / Orange / Green LED
Load Level Indicator
Failure Indicator
Red LED
Protection
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
Remote Control Unit
CR-6 / CR-8 Optional
Safety Standards
Certified UL/cUL 458
(SK1500-148 only meet UL 458)
Certified EN 60950-1
EMC
FCC Class A
Certified EN 55022; EN 55024;
EN 61000-3-2; EN 61000-3-3
EN 61000-4-2, 3, 4, 5, 6, 8, 11
E13 mark
Operating Temperature Range
0 ~ +40 ℃
Storage Temperature Range
-30℃~ +70℃
Cooling
Loading controlled cooling fan
Dimension (WxHxD)
191x88.5x370 mm / 7.519x3.484x14.567 inch
Weight
5.3 kg / 11.68 Lbs.
Note: The specifications are subject to change without notice.
5

Specification
Model No.
Item
SK2000-112
SK2000-124
SK2000-148
SK2000-212
SK2000-224
SK2000-248
Rated Power
2000W
Surge Power
Load 101 ~ 115% (3min.)
4000W (3 sec; resistive)
Input voltage
12V
24V
48V
12V
24V
48V
Output Voltage
100 / 110 / 120V +/- 5%
220 / 230 / 240V +/- 3%
Frequency
50 / 60Hz +/- 0.05% (Selectable by DIP switch)
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (Typ.) *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 Range
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Input Level Indicator
Red / Orange / Green LED
Load Level Indicator
Failure Indicator
Red LED
Protection
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
Remote Control Unit
CR-6 / CR-8 Optional
Safety Standards
meet UL 458
Certified EN 60950-1
EMC
FCC Class A
Certified EN 55022; EN 55024;
EN 61000-3-2; EN 61000-3-3
EN 61000-4-2, 3, 4, 5, 6, 8, 11
E13 mark
Operating Temperature Range
0 ~ +40 ℃
Storage Temperature Range
-30℃~ +70℃
Cooling
Loading controlled cooling fan
Dimension (WxHxD)
209x166x368 mm / 8.228x6.535x14.488 inch
Weight
9.7 kg / 21.38 Lbs.
Note: The specifications are subject to change without notice.
6

Specification
Model No.
Item
SK3000-112
SK3000-124
SK3000-148
SK3000-212
SK3000-224
SK3000-248
Rated Power
3000W
Surge Power
Load 101 ~ 115% (3min.)
6000W (3 sec; resistive)
Input voltage
12V
24V
48V
12V
24V
48V
Output Voltage
100 / 110 / 120V +/- 5%
220 / 230 / 240V +/- 3%
Frequency
50 / 60Hz +/- 0.05% (Selectable by DIP switch)
Output Waveform
Pure Sine Wave ( THD < 3% )
Efficiency (Typ.) *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 Range
10.5-15
VDC
21.0-30
VDC
42-60
VDC
10.5-15
VDC
21.0-30
VDC
42-60
VDC
Input Level Indicator
Red / Orange / Green LED
Load Level Indicator
Failure Indicator
Red LED
Protection
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
Remote Control Unit
CR-6 / CR-8 Optional
Safety Standards
meet UL 458
Certified EN 60950-1
EMC
FCC Class A
Certified EN 55022; EN 55024;
EN 61000-3-2; EN 61000-3-3
EN 61000-4-2, 3, 4, 5, 6, 8, 11
E13 mark
Operating Temperature Range
0 ~ +40 ℃
Storage Temperature Range
-30℃~ +70℃
Cooling
Loading controlled cooling fan
Dimension (WxHxD)
209x166x386 mm / 8.228x6.535x15.197 inch
Weight
11 kg / 24.25 Lbs.
Note: The specifications are subject to change without notice.
*1 : This test condition is normal DC input (13.5V) and Temperature 25’C.
7

2-3. Mechanical Drawings
8

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：
3-1-1. Front view：
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 ~ 150W
151 ~ 362W
363 ~ 622W
623 ~ 754W
Over 754W
SK1000
0 ~ 216W
217 ~ 520W
521 ~ 885W
886 ~ 1075W
Over 1075W
SK1500
0 ~ 285W
286 ~ 730W
731 ~ 1290W
1291 ~ 1563W
Over 1563W
SK2000
0 ~ 460W
461 ~ 1013W
1014 ~ 1765W
1766 ~ 2129W
Over 2129W
SK3000
0 ~ 581W
582 ~ 1510W
1511 ~ 2572W
2573 ~ 3112W
Over 3112W
3-1-5. AC Frequency：Selected by “S4” Dip Switch
Frequency
S4
50 HZ
OFF
60 HZ
ON
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
Fast Blink
OVP
Slow Blink
UVP
Intermittent Blink

OTP
Solid
OLP
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.
SK700
SK1000
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):
13

3-2. Rear Panel：
3-2-1. Remote Port:
The SK Series Inverter is compatible with any of the remote controllers,
CR-6, 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.
14

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. Protection Features:
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
28.8V
22.0V
20.3V
25.2V
48V
61.0V
58.1V
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.
We recommends the following cables for optimum inverter performance.
(Apply both 120V and 230V versions )
Model No
Wire AWG
Inline Fuse
SK700-112 / 212
# 6
100 A
SK700-124 / 224
# 6
50 A
SK700-148 / 248
# 8
30 A
SK1000-112 / 212
# 2
150 A
SK1000-124 / 224
# 4
80 A
SK1000-148 / 248
# 6
40 A
SK1500-112 / 212
# 2
200 A
SK1500-124 / 224
# 4
100 A
SK1500-148 / 248
# 6
50 A
SK2000-112 / 212
# 2/0
250 A
SK2000-124 / 224
# 1/0
125 A
SK2000-148 / 248
# 4
70 A
SK3000-112 / 212
# 4/0
400 A
SK3000-124 / 224
# 2/0
200 A
SK3000-148 / 248
# 4
100 A
17