HQ -INV4000-12 Mode D'emploi page 5

The neutral (common) conductor of the inverter's AC output circuit is connected to chassis ground.
Therefore, when the chassis is connected to ground, the neutral conductor will also be grounded.
This conforms to national electrical code requirements that separately derived AC sources (such as
inverters and generators) have their neutral conductors tied to ground in the same way that the neutral
conductor from the utility line is tied to ground at the AC breaker panel.
CAUTION!
Don't operate the 4000 W inverter without connecting it to ground. Electrical shock hazard may result.
TROUBLESHOOTING
Problems
1) Low voltage output
2) Low voltage output and AMPS
indicator in red zone
3) No voltage output and VOLTS
indicator in lower red zone
4) No voltage output and POWER
indicator no light
5) No voltage output and VOLTS
indicator in upper red zone
6) Low battery alarm on all the
time and VOLTS indicator below
10.5 V (21 V for 4000 W/24 V
inverter)
7) No voltage output, OVER TEMP
indicator light and load in excess
of 4000 W/250 amperes current
input (or 125 A for 4000 W / 24 V
inverter)
8) No voltage output, OVER TEMP
indicator light and load less than
4000 W/250 amperes current
input (or 125 A for 4000 W/24 V
inverter )
9) No voltage output and OVER
LOAD indicator light
If, after the above troubleshooting, this inverter still does not work, please return it to us or have a
qualified electrician to check and replace. Don't open the case or cut out the cord.
Possible causes
Using an average
reading volt meter
Overload
Low voltage input
a. Inverter switched off Turn inverter on
b. No power to inverter Check wiring to inverter and battery
c. Internal fuse open
d. Reverse DC polarity Have qualified electrician to check
High voltage input
a. Poor DC wiring
b. Poor battery
condition
Thermal shutdown
Thermal shutdown
a. Short circuit or wiring
error
b. Very high power
load
5
Solutions
Use true RMS reading meter
Reduce load
Recharge battery, check
connections and cable
Have qualified electrician to check
and replace
and replace fuse, please observe
correct polarity
Make sure that inverter is
connected to 12 V battery (24 V for
4000 W/24 V inverter) and check
regulation of charging system
Use proper cable and make solid
connections
Change battery or use new battery
Allow inverter to cool down and
reduce load if continuous operation
required
Make sure ventilation openings
in inverter are not blocked and
reduce ambient temperature.
Check AC wiring for short circuit or
improper polarity
Remove or reduce load