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Table 7.1 Bypass Module Fault Code List
Code
Status
indication
Message
(Note 2)
UF163
BAT.VOLTAGE ABNL.
UF202
INVERTER UV.
UF253
CTRL.CIRCUIT ERR.
UF254
CTRL.CIRCUIT ERR.
UF256
O/P VOLTAGE ABNL.
UF258
LOAD ABNORMAL
UF301
CTRL.CIRCUIT ERR.
UF302
CTRL.CIRCUIT ERR.
UF303
CTRL.CIRCUIT ERR.
UF305
CTRL.CIRCUIT ERR.
UF306
CTRL.CIRCUIT ERR.
UF320
CTRL.CIRCUIT ERR.
UF321
CTRL.CIRCUIT ERR.
UF322
CTRL.CIRCUIT ERR.
UF323
CTRL.CIRCUIT ERR.
UF324
CTRL.CIRCUIT ERR.
UF325
CTRL.CIRCUIT ERR.
UF326
CTRL.CIRCUIT ERR.
UF327
CTRL.CIRCUIT ERR.
MODULE MINOR
UF340
FAULT
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Meaning
Battery voltage is abnormal
Output voltage dropped.
Discrepancy between output
voltage and bypass voltage
during bypass operation.
Discrepancy between Bypass
voltage and inverter voltage at
transfer.
Output voltage is out of the
specified range.
Load transfer due to overload for
over 4 times within 5 minutes.
AD reference has an abnormal
value.
Detection of an external
interruption during the software
execution.
Timer does not reset in the
specified period (WDT settings)
Detection of an abnormal clock
speed in the CPU or FPGA.
Control power supply voltage is
below the specified level.
Cable disconnection in the
parallel interface board during
load supply.
Bypass not recognized by CAN
Cable disconnection in the
parallel interface board.
Cable disconnection in the
parallel interface board.
CAN signal H/L stuck
Cable disconnection in the
parallel interface board.
Communication Error (SMS)
Communication Error (MMS)
Module Major Fault
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
Audible
Guidance
Alarm
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
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
Continuous
SERVICE
sound
ENGINEER
7-4
External
relay
contact
(Note 1)
Minor
Major
Minor
Minor
Minor
Minor
Major
Major
Major
Major
Major
Major
Major
Major
Major
Major
Major
Minor
Minor
Major
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