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BYPASS MODULE FAULT CODES
Table 7.1 Bypass Module Fault Code List
Code
Status
indication
Message
(Note 2)
UA805
OVERLOAD
INVERTER
UA806
OVERLOAD
INVERTER
UA807
OVERLOAD
UA808
OVERLOAD
UA810
OVERLOAD
BYPS.VOLT.OUT
UA812
RNG.
UA813
BYPS.PHASE ABNL.
BYPS.FREQ.OUT
UA814
RNG.
TRANSFER
UA815
PROHIBITION
BYP.VOLT.OUT
UA816
RNG.2
UA817
EMERG.STOP ACTIV.
UA818
MODULE STOP
REM. BUTTON
UA821
CLOSE
UA822
LOC. BUTTON ABNL.
UA824
CB2 OPEN
UA831
EMERG.BYPS.SW.ON
UA833
52L OPEN
UA834
BATTERY DEPLETED
UA835
TRANS.INHIBITED
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Meaning
The output load current has
exceeded 100% of the rated
current.
The output load current peak has
exceeded 220% of the rated
current.
The output load current has
exceeded 105%~149% of the
rated current.
The output load current has
exceeded 100% of the rated
current during bypass supply.
Short time over-current has
exceeded 150% of the rated
current.
Bypass line voltage is out of the
specific range.
(Detection Level: <87%, >112% )
Bypass line power conductors
are not wired in a proper phase
sequence.
Bypass line frequency is out of
the specific range.
(Detection Level: Frequency
Bandwidth +0.2%)
Transfer to bypass is not
available due to bypass
abnormality.
Bypass line voltage is out of the
specified range at ECO mode.
The emergency stop was
activated by the EPO switch or
an external contact.
Input Failure and UPS stop
(Indiv. BAT only)
The UPS could not transfer to the
bypass because the inverter
output was not synchronized to
the bypass.
The UPS could not transfer to the
bypass because of backup
generator operation.
The battery circuit breaker (CB2)
is open.
Emergency bypass switch has
been turned on.
The load circuit breaker (52L) is
turned off.
The battery voltage has reached
the depleted level (400V).
The UPS could not transfer to the
bypass because the bypass
source has an abnormality.
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
Audible
Guidance
Alarm
WARNING:
Intermittent
DECREASE
sound
LOAD
WARNING:
Intermittent
DECREASE
sound
LOAD
WARNING:
Intermittent
DECREASE
sound
LOAD
WARNING:
Intermittent
DECREASE
sound
LOAD
WARNING:
Intermittent
DECREASE
sound
LOAD
CHECK
Intermittent
BYPASS
sound
INPUT
CHECK
Intermittent
BYPASS
sound
INPUT
CHECK
Intermittent
BYPASS
sound
INPUT
Intermittent
-
sound
CALL
Intermittent
SERVICE
sound
ENGINEER
Continuous
-
sound
Intermittent
-
sound
Intermittent
-
sound
CALL
Intermittent
SERVICE
sound
ENGINEER
TURN ON
Intermittent
CB2
sound
CALL
Intermittent
SERVICE
sound
ENGINEER
Intermittent
-
sound
CALL
SERVICE
-
ENGINEER
-
-
7-2
External
relay
contact
(Note 1)
Overload
Overload
Overload
Overload
Overload
Bypass
Input
Abnormal
Bypass
Input
Abnormal
Bypass
Input
Abnormal
-
-
-
-
-
-
-
-
-
Battery
Depleted
-
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