Alpha XM 6015 Series Operations Instructions download pdf (Page 58)

9. TROUBLE-SHOOTING AND REPAIR

9.4 TROUBLE-SHOOTING GUIDE

, continued

SYMPTOM PROBABLE CAUSE REMEDY

Low output voltage when Defective inverter Replace power

unit is in STANDBY mode. transistors. board assembly.

SYMPTOM PROBABLE CAUSE REMEDY

No output voltage when attempting Battery breaker off. Switch battery breaker on.

to transfer from LINE to STANDBY;

“Clicking” sound from contactor. Battery voltage below Check battery voltages; check

recharge acceptance terminal connections; charge or

level. replace batteries if necessary.

High resistance at Check battery open circuit

battery connector. voltages; clean and tighten each

connection; replace faulty

battery.

Main circuit module incorrectly Remove, clean and reseat

seated in back plane connector. assembly.

Faulty logic. Replace main circuit module.

Inverter transistors damaged. Replace power board.

Faulty standby relay. Replace relay K101.

SYMPTOM PROBABLE CAUSE REMEDY

module does not transfer Low AC line voltage. Use voltmeter to verify

from STANDBY to LINE mode nominal voltage at receptacle.

when input power is restored;

Contactor “clicks” periodically. High impedance AC line. Check all connections.

Check for correct wire gauges;

Shorten cables to AC utility.

Faulty logic. Replace main circuit assembly.

SYMPTOM PROBABLE CAUSE REMEDY

Batteries will not charge. Battery breaker off Switch battery breaker on.

Faulty batteries. Check open circuit voltage;

Check voltage under load;

Check terminals and connecting

wires. Replace faulty batteries.

Charger fuse F301 open. Replace 10 Amp fuse.

(on main circuit module)

Faulty charger circuit. Replace main circuit module.

Charger transistors damaged. Replace power board.

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Alpha XM 6015 Series Operations Instructions Page 58