Owner`s manual

Preventive Maintenance and

Trouble Shooting Procedure

IT SERIES Industrial True Sine Wave Inverter Owners Manual

6 Preventive Maintenance and Trouble Shooting Procedures

There are no user serviceable components inside the inverter. If the inverter requires service, refer

to the Vanner Power Group or other qualified service personnel.

Preventive Maintenance

For continued reliability and safety, a monthly maintenance program should be implemented to include

the following:

1. Check to insure that all wiring connections are tight, secure and corrosion free.

2. Check fan intake and exhaust vents for obstructions.

3. Examine receptacle, indicators and switches for cracks and breaks.

Examine any surfaces that are discolored or deformed due to excessive heat.

Trouble Shooting Procedures

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 Power Group Service Center

or the Vanner Power Group Customer Service Department: 1-800-AC-POWER (1-800-227-6937). Please

have your model and serial number available when consulting customer service.

Preliminary Checks

1. Indicator Light status

2. Inverter ON/OFF Switch and Remote ON/OFF Switch positions

3. AC Output Breakers CB-1, CB-2

4. Check all GFCI receptacles and circuit breakers as equipped throughout AC system

5. Battery voltage at battery and battery voltage at the inverter. Voltage present at inverter does not

prove that all connections are sound especially under no AC load. (see item 7)

6. DC Fuse condition

7. Battery connections for tightness or corrosion

8. Try operating an AC load from the GFCI receptacle located on inverter front panel

Problem Symptoms and Troubleshooting Checks

Problem:

Inverter Indicator Light does not turn ON.

Check:

Verify DC voltage at the inverter.

Problem:

Inverter Indicator Light is ON but the AC load will not operate.

Check:

Check and reset GFCI receptacle or circuit breakers. Verify AC wiring. Try a different load

such as a trouble light.

Problem:

Low Battery Indicator Light is ON when AC load is applied.

Check:

Check battery connections and condition. Recharge battery if voltage is less than 10.5 (21.0)

VDC.

Problem:

Over Temperature Indicator Light is ON.

Check:

Verify fan operation. Remove obstructions from air exhaust vents and cooling fan.