Mitsubishi Electric 9900CX SERIES Owner Technical Manual page 58

Table 6.2 UPS Module Fault Code List
Code
Status
indication
message
(Note 2)
MF302 CTRL.CIRCUIT ERR.
MF303 CTRL.CIRCUIT ERR.
MF305 CTRL.CIRCUIT ERR.
MF306 CTRL.CIRCUIT ERR.
MF309 INV.VOLTAGE ABNL.
MF320 CTRL.CIRCUIT ERR.
MF331 CTRL.CIRCUIT ERR.
MF332 CTRL.CIRCUIT ERR.
MF333 CTRL.CIRCUIT ERR.
MF334 CTRL.CIRCUIT ERR.
MF376 CTRL.CIRCUIT ERR.
MF552 DUMMY FAULT
(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"
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
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 DSP or
FPGA.
Control power supply voltage is below the specified
level.
Inverter voltage is out of the specified range.
Cable disconnection in the parallel interface board
during load supply.
Cable disconnection in the main driver PCB (Phase A)
Cable disconnection in the main driver PCB (Phase B)
Cable disconnection in the main driver PCB (Phase C)
Cable disconnection in the main driver PCB
(Chopper))
Logic signal abnormal (Supply ON)
Dummy fault for test
MITSUBISHI ELECTRIC 9900CX SERIES UPS
Meaning
Page Number:
6-8
External relay
contact
(Note 1)
Major
Major
Major
Major
Major
Major
Major
Major
Major
Major
Minor
Major