Operating instructions

9.4 TROUBLE-SHOOTING GUIDE

, continued

SYMPTOM PROBABLE CAUSE REMEDY

Incorrect, or no float or Battery breaker off. Switch battery breaker on.

equalize charge voltages:

Jumpers at JP1 incorrectly Check jumpers.

set on main circuit module. (See section 6.9)

Charger fuse F301 open Replace 10 Amp fuse.

(on main circuit module).

Faulty logic. Replace main circuit module.

Charger transistors damaged. Replace power board.

SYMPTOM PROBABLE CAUSE REMEDY

Battery breaker trips when Inverter transistors Replace power board.

attempting to transfer from damaged.

LINE to STANDBY mode:

Faulty logic. Replace main circuit module.

SYMPTOM PROBABLE CAUSE REMEDY

10 Amp charger fuse F301 Faulty fuse. Replace fuse.

(on main circuit module) open:

Faulty charger circuit. Replace power board and/or

main circuit module.

Defective charger transistors. Replace power board and/or

main circuit module.

SYMPTOM PROBABLE CAUSE REMEDY

MOV in SPI darkened Lightning or other transient Replace MOV in SPI.

or destroyed: damage on the output.

SYMPTOM PROBABLE CAUSE REMEDY

Red "CHECK BATTERIES" LED Low or no battery voltage Check battery circuit breaker.

and LRI lamp (if installed) flashing: during APM self-test mode. Check battery fuse if installed.

Check terminals and connec-

tors.

Check open circuit voltage.

Check voltage under load.

SYMPTOM PROBABLE CAUSE REMEDY

Red "CHECK INVERTER" LED Short on output during Check for short. Press

and LRI lamp (if installed) flashing: APM self-test mode. "TEST/RESET" switch to re-

test.

Loss of AC output during Replace output fuse.

APM self-test mode. Press "TEST/RESET"

Output fuse open. switch to re-test.

Loss of AC output during Replace power board

APM self-test mode. and/or main circuit module.

Output fuse OK.

9. TROUBLE-SHOOTING AND REPAIR