4 Troubleshooting
- 45 -
Fault
Code
Fault Description
Possible Cause
Solution
Err42
Large speed error
1) Motor auto-tuning is not
performed.
2) F9-69 (Detection level of
speed error) and F9-70
(Detection time of speed
error) are set improperly.
3) The load is too heavy.
1) Perform motor auto-tuning.
2) Set F9-69 (Detection level of speed
error) and F9-70 (Detection time
of speed error) correctly based on
actual conditions.
3) Select an AC drive properly.
Err45
Motor overtem-
perature
1) Cable connection of
the temperature sensor
becomes loose.
2) The motor temperature is
too high.
1) Check cable connection of the
temperature sensor.
2) Increase the carrier frequency or
take other measures to cool the
motor.
A65
Pre-warning of
pressure sensor 2
1) The pressure sensor is
connected with the tem-
perature sensor cable by
mistake.
2) The setting of P2 pres-
sure range does not meet
requirements of the
pressure sensor.
3) A8-10 [Stop pressure
setting value (protection
pressure)] and A8-11
(Pre-warning pressure
setting value) are set to
small values.
4) The pressure sensor is
abnormal.
1) Connect the pressure sensor cable
correctly.
2) Set the P2 pressure range accord-
ing to the requirements of the
pressure sensor.
3) Set A8-10 [Stop pressure setting
value (protection pressure)] and
A8-11 (Pre-warning pressure
setting value) based on actual
requirements.
4) Replace the faulty pressure sensor.
Err66
Overpressure of
pressure sensor 2
Err67
Overtemperature
of temperature
sensor 2
1) The temperature sensor
is connected with the
pressure sensor cable by
mistake.
2) The sensor temperature
is too high due to poor
heat dissipation.
1) Connect the temperature sensor
cable correctly.
2)
Check whether the air filter is
clogged and the cooling fan ro-
tates in the reverse direction.
A68
Pre-warning of
temperature sen-
sor 2