Troubleshooting and Maintenance
6-5
6
Note:
(1)
Long motor cables (with more than 100 meters) will have a high leakage capacitance to the ground. The
circulation of leakage currents through these capacitances may activate the ground fault protection after
the inverter is enabled, and consequently, the occurrence of fault F074.
POSSIBLE SOLUTIONS:
- Decrease the carrier frequency (P0297).
- Install an output reactor between the inverter and the motor.
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Fault/Alarm
Description
Possible Causes
A152:
Internal Air High
Temperature
Alarm indicating that the internal air temperature is
too high.
Note:
It may be disabled by setting P0353=1 or 3.
Surrounding air temperature too high (>50 °C (122 °F)) and
excessive output current.
Defective internal fan (if installed).
F153:
Internal Air
Overtemperature
Internal air overtemperature fault.
F156:
Undertemperature
Undertemperature fault (below -30 °C (-22 °F)) in
the IGBT or rectifier measured by the temperature
sensors.
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A177:
Fan Replacement
Fan replacement alarm (P0045 > 50000 hours).
Note:
This function may be disabled by setting P0354=0.
Maximum number of operating hours for the heatsink fan
has been reached.
F179:
Heatsink Fan Speed
Fault
This fault indicates a problem with the heatsink fan.
Note:
This function may be disabled by setting P0354=0.
Dust on fan blades and bearings.
Defective fan.
A181:
Invalid Clock Value
Invalid clock value alarm.
It is necessary to set date and time at parameters P0194 to
P0199.
Keypad battery is discharged, defective, or not installed.
F182:
Pulse Feedback Fault
Indicates a fault on the output pulses feedback.
Defect in the inverter internal circuitry.
F183:
IGBT ov
Temperature
Overtemperature related to the IGBTs overload
protection.
Surrounding air temperature too high.
Operation with frequencies < 10 Hz under overload.
