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User Manual 10H52258UM60 - Rev. 3 - 01/2019
Operation Control and Display
APM 400/600
Alarm
Description
Output Disabled
EOD event happened. Check the battery voltage
Other Bypass STS Fail
Open circuit fault or short-circuit fault on adjacent bypass STS
Input Voltage Abnormal
The mains voltage is outside specifications resulting in a rectifier shutdown
Input Undervoltage
At least one phase main input voltage is within the range 132V ~ 176V,
therefore the load should be derated
Input Freq. Abnormal
The mains frequency is outside specifications resulting in a rectifier shutdown
Input Phase Reversed
The AC input phase rotation is reversed
Input Backfeed
Battery voltage fed back to rectifier input
Input Neutral Lost
AC rectifier input neutral line not detected
Input Current Abnormal
Battery load sharing imbalance or rectifier input current abnormal
Input Current Limit
Input current over limit
Bypass Unable to Trace
The bypass frequency is outside specifications. This alarm is reset
automatically once the bypass voltage returns within normal limits
Bypass Abnormal
The amplitude or frequency of the bypass voltage exceeds the limit. This
alarm may be reset automatically
Bypass STS Fail
At least one of the bypass side STSs is open or shorted. This fault remains
active until the system is powered down
Byp. Abnormal Shutdown
Both the bypass and inverter voltages are abnormal, and the output is off
Bypass Phase Reversed
The phase rotation of the bypass voltage is reversed
Bypass overcurrent
The bypass current is out of tolerance
Bypass backfeed
The bypass back-feed is faulty
Bypass Over temperature
There is an over-temperature condition on the Bypass
Bypass in Charge
The bypass detects an inverter signal while the system is operating normally.
When the output voltage is abnormal, the system will transfer the load output
supply to the Bypass
Bypass Neutral Lost
Bypass Neutral line not detected
Bypass in Setting
The bypass module is initialized and synchronized
Rectifier Fault
Bus voltage abnormal or battery SCR short circuit
DC Bus Overvoltage
The rectifier, inverter and battery converter have been shut down because the
DC bus voltage is too high. The load transfers to bypass
DC Bus Abnor. Shutdown
The DC bus voltage is abnormal resulting in an inverter shutdown. The load
transfers to bypass
Inverter Asynchronous
The output voltage and bypass voltage are out of phase. This alarm is reset
automatically once the condition is no longer true
Inverter Fault
Inverter output voltage outside specifications. Load transfers to bypass
Inverter Relay Fail
At least one of the inverter relays is opened or shorted. This fault remains
active until the system is powered down
Output Fuse Fail
At least one of the inverter output fuses has blown
