MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-3
Table 6.1
Bypass Module Fault Code List
Code
indication
(Note 2)
Status
Message
Meaning
Guidance
Audible
Alarm
External
relay
contact
(Note 1)
UA865 MOD.BAT.END
A power converter module has
detected battery depleted.
CALL
SERVICE
ENGINEER
- Alarm
UA866 BATT.END
WA
A power converter module issues
a warning on eminent battery
depletion.
-
Intermittent
sound
Alarm
UA867 OVERTEMPERTURE
Detection of overtemperature at
the bypass bus bar.
CALL
SERVICE
ENGINEER
Intermittent
sound
Alarm
UA890
EXTERNAL ALARM
External alarm relay turned on.
-
Intermittent
sound
Alarm
UF006
CONVERTER
ABNORMAL
Mixed operation (2 minutes)
CALL
SERVICE
ENGINEER
Intermittent
sound
Major
UF055
CONVERTER
ABNORMAL
Mixed operation (20 seconds)
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF151 BAT.VOLTAGE
ABNL.
All power converter modules
have detected battery float
voltage abnormal.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF152 BAT.VOLTAGE
ABNL.
Unable to equalize the voltage of
various batteries after 24 hours.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF156 CHG.STOPPED
UF157 failure persisted for over
two(2) hours.
CHECK
BATTERY
Intermittent
sound
Battery
abnormal
UF157
BATTERY
OVERTEMP.
Detection of overtemperature at
the batteries.
CHECK
BATTERY
Intermittent
sound
Battery
abnormal
UF158
BATTERY LIQUID
LOW
Low level of battery electrolyte
solution.
CHECK
BATTERY
Intermittent
sound
Battery
abnormal
UF161 CHG.STOPPED
UF151 failure is running for over
24 hours.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF162
BATTERY
ABNORMAL
Failure detection based on
battery self-check.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF163 BAT.VOLTAGE
ABNL.
All converter modules have
detected battery voltage
abnormal.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF172
BATTERY
ABNORMAL
The external relay detected the
battery fault.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF202
INVERTER UV.
Output voltage dropped.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
UF253 CTRL.CIRCUIT
ERR.
Discrepancy between output
voltage and bypass voltage
during bypass operation.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF254 CTRL.CIRCUIT
ERR.
Inverter voltage is out of the
specification level during transfer.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF256 O/P
VOLTAGE
ABNL.
Output voltage is out of the
specified range.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF258 LOAD
ABNORMAL
Load transfer due to overload for
over 4 times within 5 minutes.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
UF301 CTRL.CIRCUIT
ERR.
AD reference has an abnormal
value.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
UF302 CTRL.CIRCUIT
ERR.
Detection of an external
interruption during the software
execution.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
UF303 CTRL.CIRCUIT
ERR.
Timer does not reset in the
specified period (WDT settings)
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Summary of Contents for 9900C Series
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