MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-8
Table 6.2
UPS Module Fault Code List
Code
indication
(Note 2)
Status
message
Meaning
External relay
contact
(Note 1)
MF302
CTRL.CIRCUIT ERR.
Detection of an external interruption during the
software execution.
Major
MF303
CTRL.CIRCUIT ERR.
Timer does not reset in the specified period (WDT
settings)
Major
MF305
CTRL.CIRCUIT ERR.
Detection of an abnormal clock speed in the DSP or
FPGA.
Major
MF306
CTRL.CIRCUIT ERR.
Control power supply voltage is below the specified
level.
Major
MF309
INV.VOLTAGE ABNL.
Inverter voltage is out of the specified range.
Major
MF320
CTRL.CIRCUIT ERR.
Cable disconnection in the parallel interface board
during load supply.
Major
MF331
CTRL.CIRCUIT ERR.
Cable disconnection in the main driver PCB (Phase A)
Major
MF332
CTRL.CIRCUIT ERR.
Cable disconnection in the main driver PCB (Phase B)
Major
MF333
CTRL.CIRCUIT ERR.
Cable disconnection in the main driver PCB (Phase C)
Major
MF334
CTRL.CIRCUIT ERR.
Cable disconnection in the main driver PCB
(Chopper))
Major
MF376
CTRL.CIRCUIT ERR.
Logic signal abnormal (Supply ON)
Minor
MF552
DUMMY FAULT
Dummy fault for test
Major
(Note 1) 1) "Major" is defined as a major failure. Load transferred from the inverter circuit to
the static bypass line;
2) "Minor" is defined as a minor failure. UPS continues to operate normally, but the
cause of alarm must be identified;
(Note 2) Code indication means:
#A+++ ----------------------
Alarm
#F+++ ----------------------
Failure
#%0++ ---------------------
Rectifier circuit failure
#%1++ ---------------------
DC circuit failure
#%2++ ---------------------
Inverter circuit failure
#%3++ ---------------------
Control circuit failure
#%4++ ---------------------
Bypass system failure
#%8++ ---------------------
Alarm
“#” Bypass Module “U”, UPS Module “M”
“+” denotes any numeral from 0 to 9
“%” denotes either “A” or “F”
Summary of Contents for 9900C Series
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