Mitsubishi Electric 9900B Series Owner Technical Manual page 66

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