MITSUBISHI ELECTRIC 1100B SERIES UPS
1100B SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-5
6.2 POWER CONVERTER MODULE FAULT CODES
Table 15
Bypass Module Fault Code List
Code
indication
(Note 2)
Status
message
Meaning
External relay
contact
(Note 1)
MA801
AC INPUT VOLTAGE
OUT OF RANGE
Input line voltage is out of the specific range.
Alarm
AC input
abnormal
MA802
AC INPUT FREQUENCY
OUT OF RANGE
Input line frequency is out of the specified range.
Alarm
AC input
abnormal
MA803
AC INPUT PHASE
ROTATION ERROR
Input line power conductors are not wired in a proper
phase sequence.
Alarm
AC input
abnormal
MA804
CONVERTER OPE.
INHIBITION
The converter interlock is active.
Alarm
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
EMERGENCY STOP
ACTIVATED
The emergency stop was activated by the EPO switch
or an external contact.
Alarm
MA824
72B OPEN
The battery disconnect contactor 72B open.
Alarm
MA825
BATTERY ABNORMAL
Battery voltage is less than end voltage at startup.
Alarm
MA828
COOLING FAN
ABNORMAL
Rotation sensor detect fan abnormal.
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
MA866
UPS CONTROL CIRCUIT
ERROR
Communication signal was lost from the bypass
module.
Minor
MF001
INPUT CIRCUIT
ABNORMAL
Detection of a large variation of the reference error
signal.
Major
MF002
CONVERTER
OVERCURRENT
Detection of converter overcurrent.
Major
MF003
PRECHARGE FAULT
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.
Major
MF108
CHOPPER
OVERCURRENT
Detection of DC overcurrent.
Major
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