English
TROUBLESHOOTING AND MAINTENANCE
Protection/Alarm
Description
Possible causes
A051:
IGBT1 V Overtemp.
Alarm of high temperature measured in the
temperature sensors (NTC) of the IGBTs.
Note:
- It can be disabled by C7.5.1.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
A052:
IGBT1 W Overtemp.
Alarm of high temperature measured in the
temperature sensors (NTC) of the IGBTs.
Note:
- It can be disabled by C7.5.1.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
F053:
IGBT1 U Overtemp.
Fault
of
overtemperature
measured
in
the
temperature sensors (NTC) of the IGBTs.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
F054:
IGBT1 V Overtemp.
Fault
of
overtemperature
measured
in
the
temperature sensors (NTC) of the IGBTs.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
F055:
IGBT1 W Overtemp.
Fault
of
overtemperature
measured
in
the
temperature sensors (NTC) of the IGBTs.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
A060:
IGBT/DRL Junction
Overtemp.
High temperature at the junction of the IGBTs or
diodes alarm.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
F061:
IGBT/DRL Junction
Overtemp.
Overtemperature at the junction of the IGBTs or
diodes fault.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
F062:
Thermal Imbalance
Power module temperature unbalance fault.
- The temperature difference between IGBT modules
of the same phase (U, V, W) is above 15
◦
C.
- The temperature difference between IGBT modules
of different phases (U and V, U and W, V and W) is
above 20
◦
C.
- The temperature difference between rectifier
modules of different phases (R and S, R and T, S and
T) is above 20
◦
C.
F070:
DC Link Short Circuit
Fault of short circuit at the output, DC link or braking
resistor.
- Short circuit between two motor phases.
- Short circuit on the connecting cables of the
dynamic braking.
- Short-circuited IGBT modules.
F071:
Overcur. at the Output
Output overcurrent fault.
- Load inertia too high or acceleration ramp too fast.
- C3.4.1 or C3.3.5.1.1 setting is too high.
F072:
Motor Overload
Motor overload fault.
Note:
- The fault can be disabled by setting C7.4.1 = 0 or
3.
- C7.4.3, C7.4.4 and C7.4.5 setting too low for the
motor.
- Load on the motor shaft is too high.
F074:
Ground Fault
Overcurrent to ground fault.
Note:
- The fault can be disabled by setting C7.2.1 = 0 or
3.
- Short circuit to the ground at one or more output
phases.
- Motor cable capacitance too high, causing current
peaks at the output.
CFW900 | 61
