Table 7.2 Ups Module Fault Code List - Mitsubishi Electric 9900D Series Owner Technical Manual

UPS MODULE FAULT CODES

Table 7.2 UPS Module Fault Code List

Code
indication
message
(Note 2)
MA801 I/P VOLT.OUT RNG.
MA802 I/P FREQ.OUT RNG.
MA803 I/P PHASE ABNL.
MA806 INVERTER OVERLOAD
MA807 INVERTER OVERLOAD
MA810 INVERTER OVERLOAD
MA817 EMERG.STOP ACTIV.
MA824 CB2 OPEN
MA834 BATTERY DEPLETED
MA836 INVERTER OVERLOAD
MA837 BATTERY DEPLETED2
MA860 CB1 ABNORMAL
MA861 52C ABNORMAL
MA870 BALANCER OVERLOAD
MA891 CHG. PROHIBITED
MA892 DISCHG. PROHIBITED
MA893 BATTERY ABNORMAL
MF001 I/P CIRCUIT ABL.
MF002 CONV OVERCURRENT
MF003 CONVERTER ABNL.
MF102 DC OVERVOLTAGE
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Status
Input line voltage is out of the specified range.
(Detection Level: <78%, >116% )
Input line frequency is out of the specified range.
(Detection Level: +/-11% )
Input line power conductors are not wired in a proper
phase sequence.
The inverter output current has exceeded 105% of the
rated current.
The inverter output current has exceeded 125% of the
rated current.
Short-time over-current has been detected during the
inverter operation.
The emergency stop was activated by the EPO switch
or an external contact.
The battery circuit breaker (CB2) is open.
The battery voltage has reached the depleted level
(400V).
The UPS could not transfer to the bypass because the
bypass source has an abnormality.
The calculated battery temperature has reached the
limit level due to the long-time large discharging.
Unmatching in command and AX of CB1
Unmatching in command and AX of 52C
The UPS detected a neutral point voltage unbalance.
(Detection Level: dV>75Vdc )
CHG. PROHIBITED is activated via input port.
DISCHG. PROHIBITED is activated via input port.
BATTERY ABNORMAL is activated via input port.
Detection of a large variation of the reference error
signal.
Detection of converter overcurrent.
(Detection Level: 280%peak )
Pre-charging circuit is not working properly.
DC voltage surpasses the overvoltage level.
(Detection Level: >880Vdc )
MITSUBISHI ELECTRIC 9900D SERIES UPS
Meaning
Page Number:
7-7
External relay
contact
(Note 1)
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Major
Major
Major
Major