Vanner 20-1050CUL - Troubleshooting; LEDs Blinking in Sequence; ON Lamp Not Lighting; AC Load Not Running

VA N NE R INCO R POR A T ED 20-1050CUL INVERTER/CHARGER—OWNER'S MANUAL
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Section 7: Troubleshooting the 20-1050CUL
The following are the most common questions heard by Vanner service professionals. If
your situation does not apply to the following categories, please contact your local Vanner
Incorporated Service Center.
Vanner Incorporated Customer Service:
1-800-AC-POWER
SYMPTOM
The LEDs on the front panel blink in sequence.
SOLUTION
It is normal for this to occure if the inverter switch is On when the DC input is connected to
the unit.
If the DC is already connected and the LEDs blink in sequence then the DC input is dipping
in voltage.
Check for poor connections in the DC wiring, bad battery, or a heavy DC load.
SYMPTOM
ON lamp does not light steadily after pushing in the ON-OFF/RESET Inverter Switch.
SOLUTION
Lamp flashes when utility power is present.
Lamp flashes in Load Demand Waiting mode.
Check/Reset GFCI on the receptacle.**
Check battery connections if utility power is OFF.
Check DC fuses if utility power is OFF.
SYMPTOM
ON lamp fully illuminates. AC load does not run.
SOLUTION
Check and reset circuit breaker and GFCI receptacle**.
Verify AC load and cord are in proper condition.
SYMPTOM
BATTERY LOW lamp illuminates when AC load is applied.
SOLUTION
Check battery connections.
Check battery condition.
Recharge battery if voltage is less than 10.5 VDC.
Check the vehicle's alternator charging system for proper operation.
SYMPTOM
OVERTEMP lamp illuminates.
SOLUTION
Something has caused the unit to overheat. Check for obstruction of air flow to the cooling
fan or from ventilation holes. Verify AC load is within unit’s rated capacity.
SYMPTOM
OVERLOAD lamp illuminates with AC load applied.
SOLUTION
Verify AC load is within unit’s rated surge and continuous capacity.
SYMPTOM
DC fuse blows when connecting DC input cables.
SOLUTION
Check for reverse polarity: red cable to battery positive (+), black cable to battery negative
(-). The unit may be damaged and require repair service.
**Note: If GFCI trips and the inverter is in load demand mode the GFCI may not reset until you toggle inverter off and back
on and then you will have 5 seconds to reset GFCI before unit goes back into load demand again or you can disable load
demand via dipswitch, if available.