Mitsubishi Electric 9900D Series Owner Technical Manual page 62

Table 7.1 Bypass Module Fault Code List
Code
Status
indication
Message
(Note 2)
UF341 #1 MAJOR FAULT
UF342 #2 MAJOR FAULT
UF343 #3 MAJOR FAULT
UF344 #4 MAJOR FAULT
UF345 #5 MAJOR FAULT
UF346 #6 MAJOR FAULT
MODULE MAJOR
UF349
FAULT
UF353 EX. I/F PCB ABNL.
UF363 CTRL.CIRCUIT ERR.
UF371 CTRL.CIRCUIT ERR.
UF372 CTRL.CIRCUIT ERR.
UF373 STS CONT.CIR.ERR.
UF374 CTRL.CIRCUIT ERR.
UF375 CTRL.CIRCUIT ERR.
UF376 CTRL.CIRCUIT ERR.
UF377 CTRL.CIRCUIT ERR.
UF378 CTRL.CIRCUIT ERR.
UF381 CTRL.CIRCUIT ERR.
UF382 CTRL.CIRCUIT ERR.
UF383 CTRL.CIRCUIT ERR.
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Meaning
#1 Module Major Fault
#2 Module Major Fault
#3 Module Major Fault
#4 Module Major Fault
#5 Module Major Fault
#6 Module Major Fault
All Module Major Fault
Communication error with I/F
PCB
Synchronization status signal is
being received for a considerable
time.
Minor communication error
during parallel operation.
Unable to synchronize the
inverter output and the bypass
voltage.
STS current sensor abnormal
(ECO)
Cable disconnection in the
parallel interface board.
Unable to achieve
synchronization for parallel
operation.
No control response from another
UPS although its detection is
possible.
Overload detection signal is
being received continuously for a
considerable time.
No answer for sending
synchronizing signal.
No module supply answer during
UPS operation.
Module supply answer during
UPS halt.
Module overcurrent answer
continued for 10 seconds or
more.
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
Audible
Guidance
Alarm
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
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ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
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
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
7-5
External
relay
contact
(Note 1)
Minor
Minor
Minor
Minor
Minor
Minor
Major
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor