AEC Star T3 - 2 Fault and Warning

ST3 6-10kVA Service Manual Rev.1
Allis Electric Page 2 of total 12 September 2006
2. Fault and Warning
LCD & LED Status /
Audible Alarms
Possible Cause Action
Fault Warning Normal
y UPS in Bypass Mode.
y The alarm beeps continuously.
AC: OK BATT: OK
TEMP Fail
1. Fan fail.
2. Temperature is
higher than
allowed operation
temperature.
1. Replace the fan.
2. Reduce ambient
temperature or O/P load.
Fault Warning Normal
y UPS in Bypass Mode.
y Fault LED lights up and the
alarm beeps continuously.
AC: OK BATT: OK
Inverter Fail
1. Inverter circuit
failed.
2. Inverter driver
failed.
3. PFC circuit failed.
1. Replace the Inverter
components or driver.
2. Replace the PFC
components or driver.
Fault Warning Normal
y UPS in Normal Mode, but
battery capacity is low.
y The alarm beeps once every
second for battery low.
AC: OK BATT: LOW
Normal Mode
1. Charger may
break down.
1. Please replace charger
board.
Fault Warning Normal
y UPS stop working.
y The alarm beeps continuously.
AC: OK BATT: OK
DC_BUS Fail
1. Boost circuit
failed.
2. Inverter circuit
failed
3. PFC circuit failed
4. BUS circuit failed.
1. Replace the Boost
components.
2. Replace the Inverter
components.
3. Replace the PFC
components.
4. Replace the BUS circuit
components.