5
2.2.3. CHASSIS GROUND LUG
The inverter has a lug which is to connect the chassis of the inverter. The ground wire in the
AC junction box on the output panel of the inverter is connected to the chassis .
The chassis ground lug must be connected to a grounding point, which will very depending on
where the inverter is installed. In a vehicle, connect the chassis ground lug to the chassis of
the vehicle. In a boat, connect to the boat’s grounding system. In a fixed location, connect to
earth ground by a ground rod (a metal rod pounded into the earth), or other proper service
entrance ground. Use a #12 AWG or larger copper wire ( preferably with green/yellow
insulation ) to connect the chassis ground lug to the grounding point .
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 2500W inverter without connecting it to ground . Electrical shock
hazard may result .
6. TROUBLESHOOTING
Problems Possible causes Solutions
1. Low voltage output
Using an average reading
voltmeter
Use true RMS reading
meter
2. Low voltage output and
AMPS indicator in red zone
Overload Reduce load
3. No voltage output and
VOLTS indicator in lower red
zone
Low voltage input Recharge battery , check
connections and cable
a. Inverter switched off Turn inverter on
b. No power to inverter Check wiring to inverter
and battery
c. Internal fuse open
Have qualified electrician
to check and replace
4. No voltage output and
POWER indicator no light
d.Reverse DC polarity Have qualified electrician
to check replace fuse ,
please observe correct
polarity
5. No voltage output and
VOLTS indicator in upper
red zone
High voltage input Make sure that inverter is
connected to 12V battery
( 24V for 2500W/24V
inverter ) and check
regulation of charging
system
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