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SK Series
Pure Sine Wave Inverter
User’s Manual
Table of Contents
1. Important Safety Information.………………………………………………
1-1 General Safety Precautions……………………………………………
1-2 Battery Precautions………………………..…………………………..
2. Features………………………………………………………………………...
2-1 Application……………………………………………………………….
2-2 Electrical Performance…………………………………………………
2-3 Mechanical Drawings…………………………………………………..
2
3~7
8~9
3. Introduction…………………………………………………………………… 10
3-1 Front Panel operation….……………………………………………... 10~13
1
2
1
1
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…………………………………………………..
3-7 Inverter Operation………………………………………………………
4. Troubleshooting guide………………………………………………………
5. Maintenance……………………………………………………………………
6. Warranty………………………………………………………………………..
20
21
22
23
23
1. Important Safety Instructions
WARNING!
Before using the Inverter, read and save the 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.
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
3
2-2. Electrical Performance
Specification Model No.
C o n
Item it n u o u s O u t p u t P o w e r
M a x i m u m O u t p u t P o w e r
S u r g e R a it n g ( M a x .
)
SK700-112 SK700-124 SK700-148 SK700-212 SK700-224 SK700-248
7 0 0 W
7 7 0 W
1 4 0 0 W
Input voltage
Output Voltage
Frequency
(Switch Selections)
O u t p u t W a v e f o r m
Efficiency (full load) Max. *1
No Load Current Draw (Max.)
12V
89.0%
1.25A
Stand-By Current Draw (Max.) 0.25A
Input Voltage Regulation
10.5-15
VDC
Input Level Indicator
24V
P
91.0%
0.64A
0.15A
21.0-30
VDC u r e S i
48V
100 / 110 / 120V +/- 5%
12V 24V 48V
220 / 230 / 240V +/- 3%
50 / 60Hz +/- 0.05% n e W
92.0%
0.31A
0.08A
42-60
VDC a v e ( T H D
91.0%
1.20A
0.25A
10.5-15
VDC
< 3 % )
93.0%
0.60A
0.15A
21.0-30
Red / Orange / Green LED
VDC
94.0%
0.28A
0.08A
42-60
VDC
Load Level Indicator
F a li u r e I n d i c a t o r
Protection
R e d L E D
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
R e m o t e C o n t r o l U n i t
Safety Cert.
C R 6 / C R 8 O p it o n a l
Meet UL458 EN60950-1
E M C F C C C l a s s A
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995 e-mark e13 022986
Operating Temperature Range
Storage Temperature Range
C o o il n g
Dimensions
W e i g h t
0 - 40 ℃
℃
L o a d i n g c o n t r o ll e d c o o il n g f a n
273(L)*179(W)*71.5(H)mm / 10.75(L)*7.05(W)*2.81(H) Inch
2 .
7 k g / 5 .
4 L b s .
Note: The specifications are subject to change without notice.
Specification Model No.
C o n
Item it n u o u s O u t p u t P o w e r
M a x i m u m O u t p u t P o w e r
S u r g e R a it n g ( M a x )
SK1000-112 SK1000-124 SK1000-148 SK1000-212 SK1000-224 SK1000-248
1 0 0 0 W
1 1 0 0 W
2 0 0 0 W
Input voltage
Output Voltage
Frequency
(Switch Selectable)
O u t p u t W a v e f o r m
Efficiency (full load) Max. *1
No Load Current Draw (Max.)
12V
89.0%
1.43A
Stand-By Current Draw (Max.) 0.25A
Input Voltage Regulation
10.5-15
VDC
Input Level Indicator
24V
P
92.0%
0.75A
0.15A
21.0-30
VDC u r e S i
48V
100 / 110 / 120V +/- 5%
12V 24V 48V
220 / 230 / 240V +/- 3%
50 / 60Hz +/- 0.05% n e W
93.0%
0.38A
0.09A
42-60
VDC a v e ( T H D
91.0%
1.25A
0.25A
10.5-15
VDC
< 3 % )
94.0%
0.65A
0.15A
21.0-30
Red / Orange / Green LED
VDC
95.0%
0.35A
0.09A
42-60
VDC
Load Level Indicator
F a li u r e I n d i c a t o r
Protection
R e d L E D
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
R e m o t e C o n t r o l U n i t
S a f e t y C e r it if c a it o n
C R 6 / C R 8 O p it o n a l
U L 4 5 8 E N 6 0 9 5 0 1
E M C F C C C l a s s A
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995 e-mark e13 022694
Operating Temperature Range
Storage Temperature Range
C o o il n g
Dimensions
W e i g h t
0 - 40 ℃
℃
L o a d i n g c o n t r o ll e d c o o il n g f a n
340(L)*182(W)*88(H)mm / 13.39(L)*7.17(W)*3.46(H) Inch
4 k g / 8 .
8 L b s .
Note: The specifications are subject to change without notice.
4
5
Specification
C o n
Item it n u o u s O u t p u t P o w e r
M a x i m u m O u t p u t P o w e r
S u r g e R a it n g ( M a x )
Input voltage
Output Voltage
Frequency
(Switch Selectable)
O u t p u t W a v e f o r m
Efficiency (full load) Max. *1
No Load Current Draw (Max)
Stand-By Current Draw (Max)
Input Voltage Regulation
Model No.
SK1500-112 SK1500-124 SK1500-148 SK1500-212 SK1500-224 SK1500-248
1 5 0 0 W
12V 24V 48V
100 / 110 / 120V +/- 5%
1 6 5 0 W
3 0 0 0 W
12V 24V 48V
220 / 230 / 240V +/- 3%
88.0%
1.45A
0.28A
10.5-15
VDC
50 / 60Hz +/- 0.05%
P u r e S i n e W a v e ( T H D < 3 % )
91.0%
0.75A
0.15A
21.0-30
VDC
92.0%
0.40A
0.09A
42-60
VDC
90.0%
1.40A
0.28A
10.5-15
VDC
93.0%
0.70A
0.15A
21.0-30
VDC
94.0%
0.40A
0.09A
42-60
VDC
Input Level Indicator
Load Level Indicator
F a li u r e I n d i c a t o r
Red / Orange / Green LED
Protection
R e m o t e C o n t r o l U n i t
Safety Certification
E M C
Operating Temperature Range
Storage Temperature Range
C o o il n g
Dimensions
W e i g h t
R e d L E D
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
C R 6 / C R 8 O p it o n a l
Meet UL458
F C C C l a s s A
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
0 - 40 ℃
EN60950-1 e-mark e13 22876
-30℃ to 70℃
L o a d i n g c o n t r o ll e d c o o il n g f a n
370(L)*191(W)*88(H)mm / 14.57(L)*7.52(W)*3.46(H) Inch
4 .
8 k g / 1 0 .
5 6 L b s .
Note: The specifications are subject to change without notice.
Specification
C o n
Item it n u o u s O u t p u t P o w e r
M a x i m u m O u t p u t P o w e r
S u r g e R a it n g ( M a x )
Input voltage
Output Voltage
Frequency
(Switch Selectable)
O u t p u t W a v e f o r m
Efficiency (full load) Max. *1
No Load Current Draw (Max)
Stand-By Current Draw (Max)
Input Voltage Regulation
Model No.
SK2000-112 SK2000-124 SK2000-148 SK2000-212 SK2000-224 SK2000-248
2 0 0 0 W
12V 24V 48V
100 / 110 / 120V +/- 5%
2 2 0 0 W
4 0 0 0 W
12V 24V 48V
220 / 230 / 240V +/- 3%
89.0%
2.8A
0.60A
10.5-15
VDC
50 / 60Hz +/- 0.05%
P u r e S i n e W a v e ( T H D < 3 % )
92.0%
1.5A
0.30A
21.0-30
VDC
93.0%
0.7A
0.15A
42-60
VDC
91.0%
2.64A
0.60A
10.5-15
VDC
94.0%
1.32A
0.25A
21.0-30
VDC
95.0%
0.65A
0.15A
42-60
VDC
Input Level Indicator
Load Level Indicator
F a li u r e I n d i c a t o r
Red / Orange / Green LED
Protection
R e m o t e C o n t r o l U n i t
Safety Certification
E M C
Operating Temperature Range
Storage Temperature Range
Cooling
Dimensions
W e i g h t
R e d L E D
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
C R 6 / C R 8 O p it o n a l
Meet UL458
F C C C l a s s A
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
0 - 40 ℃
EN60950-1
e-mark e13 22846
-30℃ to 70℃
Loading controlled cooling fan ( 65℃ ON , 45℃ OFF)
368(L)*209(W)*166(H)mm / 14.49(L)*8.23(W)*6.53(H) Inch
9 k g / 1 9 .
8 L b s .
Note: The specifications are subject to change without notice.
6
Specification
C o n
Item it n u o u s O u t p u t P o w e r
M a x i m u m O u t p u t P o w e r
S u r g e R a it n g ( M a x )
Input voltage
Output Voltage
Frequency
(Switch Selectable)
O u t p u t W a v e f o r m
Efficiency (full load) Max. *1
No Load Current Draw (Max)
Stand-By Current Draw (Max)
Input Voltage Regulation
Model No.
SK3000-112 SK3000-124 SK3000-148 SK3000-212 SK3000-224 SK3000-248
3 0 0 0 W
12V 24V 48V
100 / 110 / 120V +/- 5%
3 3 0 0 W
6 0 0 0 W
12V 24V 48V
220 / 230 / 240V +/- 3%
88.0%
3.0A
0.55A
10.5-15
VDC
50 / 60Hz +/- 0.05%
P u r e S i n e W a v e ( T H D < 3 % )
91.0% 92.0% 90.0% 93.0%
1.6A
0.35A
21.0-30
VDC
0.8A
0.19A
42-60
VDC
2.8A
0.55A
10.5-15
VDC
1.5A
0.35A
21.0-30
VDC
94.0%
0.7A
0.19A
42-60
VDC
Input Level Indicator
Load Level Indicator
F a li u r e I n d i c a t o r
Red / Orange / Green LED
Protection
R e m o t e C o n t r o l U n i t
Safety Cert.
E M C
Operating Temperature Range
Storage Temperature Range
C o o il n g
Dimensions
W e i g h t
R e d L E D
Overload, Short Circuit, Reverse Polarity (Fuse),
Over / Under Input Voltage, Over Temperature.
C R 6 / C R 8 O p it o n a l
Meet UL458
F C C C l a s s A
EN55022: 1997
EN55024: 1997
EN61000-3-2: 1998
EN61000-3-3: 1995
0 - 40 ℃
EN60950-1 e-mark e13 22845
-30℃ to 70℃
L o a d i n g c o n t r o ll e d c o o il n g f a n
398(L)*209(W)*166(H)mm / 15.67(L)*8.23(W)*6.53(H) Inch
9 .
8 k g / 2 2 L b s .
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
Y
NIT E U
AR
AG
OL
AM
E P RS
L D
VE
WIL
RE
) NEG(-
UT NP DC I
) POS(+
D
SIS
OUN
AS
GR
CH
E
RT PO
MOT RE
SK700 151.00[5 94]
SK1000 154.00 [6.06]
SK1500 163.00[6.42]
I
0
OFF
REMOTE
PURE SINE WAVE INVERTER 1000W
INPUT
LEVEL
LOAD
LEVEL
STATUS
FREQ.
PWR.
SAV.
O I
S4
S3
S2
S1
AC OUTPUT
SK700 179.00[7.05]
SK1000 182.00[7.17]
SK1500 191.00[7.52]
8
9
177.00 [6.97]
PURE SINE WAVE INVERTER
I
0
ON
OFF
REMO.
S4
S3
S2
S1
O I
INPUT
LEVEL
LOAD
LEVEL
STATUS
FREQ.
PWR.
SAV.
AC OUTPUT
209.00 [8.23]
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:
0
I
ON
OFF
REMOTE
PURE SINE WAVE INVERTER
INPUT
LEVEL
LOAD
LEVEL
STATUS
FREQ.
PWR.
SAV.
O I
S4
S3
S2
S1
AC OUTPUT
SK700
SK1000
SK1500
I
0
ON
OFF
REMO.
S4
S3
S2
S1
O I
INPUT
LEVEL
LOAD
LEVEL
STATUS
FREQ.
PWR.
SAV.
PURE SINE WAVE INVERTER
AC OUTPUT
SK2000
SK3000
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
11
3-1-3. Input Level:Display Input Voltages
LED Status
RED Slow Blink
RED
ORANGE
GREEN
ORANGE Blink
OVER RED Blink
DC 12V
10.3~10.6
10.6~11.0
11.0~12.1
12.1~14.2
14.2~15.0
15.0
3-1-4. Load Level:Display AC Loads (Watts)
DC 24V
20.5~21.2
21.2~21.8
21.8~24.1
24.1~28.6
28.6~30.0
30.0
DC 48V
40.8~42.4
42.4~43.5
43.5~48.1
48.1~56.3
56.3~59.6
59.6
LED status DARK
SK700
SK1000
SK1500
SK2000
SK3000
0 ~ 56W
0 ~ 80W
0 ~ 120W
0 ~ 160W
0 ~ 240W
GREEN ORANGE RED RED BLINK
56 ~ 230W 230 ~ 525W 525 ~ 672W Over 672W
80 ~ 330W 330 ~ 750W 750 ~ 960W Over 960W
120 ~ 495W 495 ~ 1125W 1125 ~ 1450W Over 1450W
160 ~ 660W 660 ~ 1500W 1500 ~ 1920W Over 1920W
240 ~ 990W 990 ~ 2250W 2250 ~ 2880W Over 2880W
3-1-5. AC Frequency:Selected by “S4” Dip Switch
Frequency
5 0 H Z
6 0 H Z
S4
O F F
O N
3-1-6. Status:Display Power & Fault Status
Green LED
Solid
Slow Blink
Red LED
F a s t B il n k
S l o w B il n k
Intermittent Blink
S o il d
LED Signal
LED Signal
Status
Power OK
Power Saving
Status
O V P
U V P
OTP
O L P
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
DISABLE DISABLE DISABLE
15W
25W
20W
40W
40W
80W
40W
50W
65W
75W
85W
55W
75W
95W
115W
135W
125W
170W
210W
245W
280W
S1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
S2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
S3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
12
13
3-1-8. AC outlets (available):
North America (GFCI) NEMA 5-20R
NEMA 5-15R Continental European
Australia / New Zealand United Kingldom
Universal
IEC-2
IEC-1
HARD WIRE
3-2. Rear Panel Operations:
CHASSIS
GROUND
DC INPUT
POS(+) NEG(-)
SK700
SK1000
SK1500
REVERSE POLARITY
WILL DAMAGE UNIT
SK2000
SK3000
DC INPUT
WARNING:
REVERSE POLARITY
WILL DAMAGE UNIT
SHOCK HAZARD.
DO NOT OPEN. NO
USER SERVICEABLE
PARTS INSIDE.
POS(+)
NEG(-)
REMOTE
PORT
CHASSIS
GROUND
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.
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
12 V
DC Input Voltage
Minimum Maximum
10.5 15.0
24 V
48 V
21.0
42.0
30.0
60.0
3-2-4. Use wire # 8 AWG to connect Chassis ground with vehicle chassis.
WARNING!
Operating the inverter without a proper ground
Connection may cause an electrical hazard.
3-3. Protections Features:
15
Model
12 V
24 V
48V
DC Input (VDC)
Over Voltage
Shutdown
Restart
Under
Voltage
Alarm
Under
Voltage
Shutdown
Restart
15.3V 14.3V 11.0V 10.2V
12.7V
Over Temperature Protection
INTERIOR
Shutdown
Restart
HEAT SINK
Shutdown
Restart
30.6V 28.6V
61.0V 57.2V
22.0V 20.3V
25.2V
44.0V 40.8V
49.7V
70℃ 45℃ 90℃ 60℃
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
17
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
SK700-112 / 212
SK700-124 / 224
S K 7 0 0 1 4 8 / 2 4 8
SK1000-112 / 212
S K 1 0 0 0 1 2 4 / 2 2 4
SK1000-148 / 248
SK1500-112 / 212
SK1500-124 / 224
S K 1 5 0 0 1 4 8 / 2 4 8
SK2000-112 / 212
SK2000-124 / 224
SK2000-148 / 248
SK3000-112 / 212
SK3000-124 / 224
SK3000-148 / 248
Wire AWG
# 4
# 6
# 8
# 2
# 4
# 6
# 2
# 4
# 6
# 2/0
# 1/0
# 2
# 4/0
# 2/0
# 1/0
Inline Fuse
100 A
50 A
3 0 A
150 A
8 0 A
40 A
200 A
100 A
5 0 A
250 A
125 A
70 A
400 A
200 A
100 A
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.
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.
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.
Also, use only high quality copper wire and keep cable length short, a maximum of 3 - 6 feet.
Battery to inverter cable connection
M8 SCREW
PVC WIRE
AWG#2-#6
RING TERMINAL
Do not place anything between battery cable lug and terminal surface.
Assemble exactly as shown.
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INLINE FUSE
DC INPUT
WARNING:
REVERSE POLARITY
WILL DAMAGE UNIT
DO NOT OPEN. NO
PARTS INSIDE.
POS(+)
NEG(-)
REMOTE
PORT
CHASSIS
GROUND
BATTERY
SK700
SK1000
SK1500
CHASSIS
GROUND
DC INPUT
POS(+) NEG(-)
SK2000
SK3000
INLINE FUSE
BATTERY
Battery to inverter cable connection
WASHER
M8 NUT
SPRING WASHER
RING TERMINAL
PVC WIRE
PLASTIC COVER
(RED)
Do not place anything between battery cable lug and terminal surface.
Assemble exactly as shown.
PLASTIC COVER
(BLACK)
3-6. AC Safety Grounding:
The AC output ground wire should go to the grounding point for your loads
( for example, a distribution panel ground bus ).
3-6-1. Neutral Grounding (GFCI’S):
3-6-1-1.
120V models:The neutral conductor of the AC output circuit of the Inverter is automatically connected to the safety ground during inverter operation. This conforms to National
Electrical Code requirements that separately derived from AC sources (such as inverters and generators) which have their neutral conductors tied to ground in the same way as the neutral conductors from the utility tied to ground at the AC breaker panel. For models configured with a transfer relay, while AC utility power is present and the Inverter is in bypass mode, this connection (the neutral of the Inverter’s AC output to input safety ground) is not present so that the utility neutral is only connected to ground at your breaker panel, as required.
Ground Fault Circuit Interrupters (GFCI):
Installations in Recreational Vehicles (for North American approvals) will require GFCI protection of all branch circuit connected to the AC output of the hardwire terminal equipped with Inverter. In addition, electrical codes require GFCI protection of certain receptacles in residential installations.
While the pure sine wave output of the Inverter is equivalent to the waveform provided by utilities, compliance with UL standards requires us to test and recommend specific GFCI.
Cotek has tested the following GFCI – protected 20A receptacles and found that they functioned properly when connected to the output of the Inverter.
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3-7. Inverter Operation:
To operate the power inverter, use the ON / OFF switch on the Front panel to turn the power on. Then the power inverter is ready to deliver AC power to your loads. If there is several loads use, turn them on separately after the inverter is “ON” in order to prevent OVP resulted from the surge power.
3-7-1. Set the power switch to “ON” position and the buzzer will send out
“Beep” sounds at the moment. Then the inverter will make selfdiagnosis, and the LED’s indicators will also appear various colors.
Finally the buzzer will “Beep” again and the Input Level and Status
LED indicators will turn to “Green” color, then the inverter starts to work successfully.
3-7-2. Set the power switch to the OFF position, then the inverter stops and all the lights go Off.
3-7-3. Set the power inverter switch to ON position and turn the test load On.
The inverter should supply power to the load. If you plan to accurately measure the true output r.m.s. voltage of the inverter, a meter such as FLUKE 45 BECKMAN 4410 or TRIPLETT 4200 must be used.
4. Troubleshooting:
WARNING!
Do not open or disassemble the Inverter.
Attempting to service the unit yourself may cause the risk of electrical shock or fire.
Problems and Symptoms
“No AC Power Output”
STATUS illuminates the red LED a. Blinking fast b. Blinking slowly. c. Blinking Intermittently. d. Solid ON.
Possible Cause Solutions
Over input voltage.
( OVP )
Low input voltage.
( UVP )
Check input voltage.
Reduce input voltage.
Recharge battery.
Check connections and the cable.
Thermal shutdown.
( OTP )
Short circuit or Wiring error.
Overload.(OLP)
Improve ventilation.
Make sure ventilation shafts in the inverter are not obstructed.
Lower ambient temperature.
Check AC wiring for short circuit.
Reduce the load.
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5. Maintenance:
To keep your inverter operating properly, there is very little maintenance required.
You should clean the exterior periodically with a damp cloth to prevent accumulation of dust and dirt. At the same time, tighten the screws on the DC input terminals.
6. 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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2010.11 A0
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