78 G9000 Installation and Operation Manual
Status message Meaning Guidance Buzzer
External
UA824 CB2 OPEN The battery circuit breaker (CB2) is open. TURN ON CB2
The interlock for the inverter output contactor
(52C) is active.
EMERGENCY
BYPASS SWITCH ON
Emergency bypass switch has been turned
on.
Alarm －
UA833 52L OPEN The load circuit breaker(52L) is turned off. －
The battery voltage has reached the
depleted level.
－ －
Lit on
UA835
TRANSFER
PROHIBITED
The UPS could not transfer to the bypass
because the bypass source has an
Remote start or stop signal is being received
continuously for a considerable time.
Alarm －
UA861
LOCAL BUTTON
ABNORMAL
Local start or stop signal is being received
continuously for a considerable time.
－
Intermittent
sound
Alarm －
UA870
The UPS detected a neutral point voltage
unbalance.
－
UA890 EXTERNAL ALARM External Alarm relay turned on. －
The MMS input reference error signal
exceeds specifications.
Detection of MMS converter overcurrent.
Pre-charging circuit is not working properly.
Major Lit on
UF011 CB1 ABNORMAL
Major discrepancy between reference signal
and actual state of contactor CB1.
Major Lit on
UF052 CB1 ABNORMAL
Minor discrepancy between reference signal
and actual state of contactor CB1.
Detection of SMS converter overcurrent.
The SMS input reference error signal
exceeds specifications.
Minor Flicker
UF102 DC OVERVOLTAGE DC voltage surpasses the overvoltage level.
Major Lit on
UF103 DC UNDERVOLTAGE
DC voltage dropped below the undervoltage
level.
Detection of DC overcurrent from backup
battery.
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