MITSUBISHI ELECTRIC 9900B SERIES UPS
MITSUBISHI
ELECTRIC
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-3
Table 6.1 (continuation)
Code
indication
(Note 3)
Status
message
Meaning
Guidance
Buzzer
External
relay contact
(Note 1)
Failure
lamp
(Note 2)
UA822
TRANSFER
PROHIBITION
The UPS cannot transfer to
the bypass because of
backup generator operation.
-
-
Alarm
-
UA824
CB2 OPEN
The battery circuit breaker
(CB2) is open.
TURN ON
CB2
Intermittent
sound
Alarm
-
UA827
52C OPE.
PROHIBITION
The interlock for the inverter
output contactor (52C) is
active.
-
Intermittent
sound
Alarm
-
UA831
EMERGENCY
BYPASS SWITCH
ON
Emergency bypass switch
has been turned on.
-
Intermittent
sound
Alarm
-
UA833
52L OPEN
The load circuit breaker(52L)
is turned off.
-
Intermittent
sound
Alarm
-
UA834
BATTERY
DEPLETED/AC
OUT STOPPED
The battery voltage has
reached the depleted level.
-
-
Major
End-of-
Discharge
Lit on
UA835
TRANSFER
PROHIBITION
The UPS could not transfer
to the bypass because the
bypass source has an
abnormality.
-
-
Alarm
-
UA860
REMOTE
BUTTON
ABNORMAL
Remote start or stop signal
is being received
continuously for a
considerable time.
-
Intermittent
sound
Alarm
-
UA861
LOCAL BUTTON
ABNORMAL
Local start or stop signal is
being received continuously
for a considerable time.
-
Intermittent
sound
Alarm
-
UA870
BALANCER
OVERLOAD
The UPS detected an
neutral point voltage
unbalance.
-
Intermittent
sound
Alarm
Overload
-
UA890
EXTERNAL
ALARM
External Alarm relay turned
on.
-
Intermittent
sound
Alarm
-
UF001
INPUT CIRCUIT
ABNORMAL
Detection of a large variation
of the reference error signal.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF002
CONVERTER
OVERCURRENT
Detection of converter
overcurrent.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF003
CONVERTER
ABNORMAL
Pre-charging circuit is not
working properly.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF011
CB1 ABNORMAL
Major discrepancy between
reference signal and actual
state of contactor CB1.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF052
CB1 ABNORMAL
Minor discrepancy between
reference signal and actual
state of contactor CB1.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF056
CONVERTER
OVERCURRENT
Detection of converter
overcurrent.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF059
INPUT CIRCUIT
ABNORMAL
Detection of a large variation
of the reference error signal.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF102
DC
OVERVOLTAGE
DC voltage surpasses the
overvoltage level.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
Summary of Contents for 9900B Series
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