Mitsubishi Electric 9900D Series Owner Technical Manual page 65

Table 7.2 UPS Module Fault Code List
Code
Status
indication
message
(Note 2)
MF103 DC UNDERVOLTAGE
MF104 DISCHARGE FAULT
MF108 CHOP OVERCURRENT
MF109 DC UNBALANCED
MF110 ZERO PHASE OC.
MF111 CTRL.CIRCUIT ERR.
MF112 DC CIRCUIT ABNL.
MF119 DC GROUND FAULT
MF128 CTRL.PWR. ABNL.
MF151 BAT.VOLTAGE ABNL.
MF152 BAT.VOLTAGE ABNL.
MF154 CB2 ABNORMAL
MF156 CHG. STOPPED
MF157 BATTERY OVERTEMP.
MF159 DC GROUND FAULT
MF160 CTRL.CIRCUIT ERR.
MF161 CHG.STOPPED
MF162 BATTERY ABNORMAL
MF163 BAT.VOLTAGE ABNL.
MF179 DC GROUND FAULT
MF201 INVERTER OV.
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
DC voltage dropped below the undervoltage level.
(Detection Level: <630Vdc )
Capacitor voltage is higher than 100V at 5 minutes
after module stop.
Detection of DC overcurrent.
(Detection Level: 290%peak )
Major unbalance of the neutral point voltage.
(Detection Level: dV>150Vdc )
Major unbalance of the neutral point voltage.
(Detection Level: >50% )
Battery current unbalance.
(Detection Level: dI>25% )
Sudden change of the DC voltage level.
Detection of DC ground fault.
Power supply voltage to IGBT driver PCB is below the
specified level.
24 hours after input power restoration, batteries do not
reach float voltage level.
Unable to equalize the voltage of various batteries
after 24 hours.
During UVT, status signal from CB2 is ON.
UF157 failure persisted for over two (2) hours.
Detection of overtemperature at the batteries.
Detection of DC ground fault.
Abnormal behavior of DC current sensor.
UF151 failure is running for over 24 hours.
Failure detection based on battery self-check.
Battery voltage is abnormal.
Detection of DC ground fault continued for 5 minutes.
Detection of output overvoltage.
MITSUBISHI ELECTRIC 9900D SERIES UPS
Meaning
Page Number:
7-8
External relay
contact
(Note 1)
Major
Minor
Major
Major
Major
Major
Major
Major
Major
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Minor
Major