MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-6
UPS MODULE FAULT CODES
Table 6.2
UPS Module Fault Code List
Code
indication
(Note 2)
Status
message
Meaning
External relay
contact
(Note 1)
MA801
I/P VOLT.OUT RNG.
Input line voltage is out of the specific range.
Alarm
AC input
abnormal
MA802
I/P FREQ.OUT RNG.
Input line frequency is out of the specified range.
Alarm
AC input
abnormal
MA803 I/P
PHASE
ABNL.
Input line power conductors are not wired in a proper
phase sequence.
Alarm
AC input
abnormal
MA806
INVERTER OVERLOAD
The inverter output current has exceeded 110% for 1
min. or 130% for 30sec. of the rated current.
Alarm
Overload
MA807
INVERTER OVERLOAD
The inverter output current has exceeded 110% of the
rated current.
Alarm
Overload
MA810
INVERTER OVERLOAD
Short time over-current has exceeded 150% of the
rated current
Alarm
Overload
MA817
EMERG.STOP ACTIV.
The emergency stop was activated by the EPO switch
or an external contact.
Alarm
MA824
CB2 OPEN
The battery disconnect contactor CB2 open.
Alarm
MA834
BATTERY DEPLETED
The battery voltage has reached the depleted level.
Major
End-of-
Discharge
MA836
INVERTER OVERLOAD
The output load active power has exceeded 110% of
the rated current.
Alarm
Overload
MA870
BALANCER OVERLOAD
The UPS detected a neutral point voltage unbalance.
Alarm
Overload
MF001
I/P CIRCUIT ABL.
Detection of a large variation of the reference error
signal.
Major
MF002
CONV OVERCURRENT
Detection of converter overcurrent.
Major
MF003
CONVERTER ABNL.
Pre-charging circuit is not working properly.
Major
MF102
DC OVERVOLTAGE
DC voltage surpasses the overvoltage level.
Major
MF103
DC UNDERVOLTAGE
DC voltage dropped below the undervoltage level.
Major
MF104
DISCHARGE FAULT
Capacitor voltage is higher than 100V at 5 minutes
after module stop.
Minor
MF108
CHOP OVERCURRENT
Detection of DC overcurrent.
Major
MF109
DC UNBALANCED
Major unbalance of the neutral point voltage.
Major
MF110
ZERO PHASE OC.
Major unbalance of the neutral point voltage.
Major
MF111
CTRL.CIRCUIT ERR.
Battery current unbalance.
Major
MF112
DC CIRCUIT ABNL.
Sudden change of the DC voltage level.
Major
Summary of Contents for 9900C Series
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