4 Troubleshooting
- 44 -
Fault
Code
Fault Description
Possible Cause
Solution
Err16
Communication
fault
1) The host computer is
abnormal.
2) The communication
cable is faulty.
3) F0-28 (Auxiliary frequen-
cy coefficient) is set im
-
properly for the commu-
nication extension card.
4) Communication param-
eters in group FD are set
improperly.
1) Check wiring of the host comput-
er.
2) Check connection of the commu-
nication cable.
3) Set the communication extension
card type correctly.
4) Set communication parameters in
group FD properly.
After all the preceding solutions
are done but the fault still exists,
restore the default settings.
Err17
Contactor fault
1) The drive board and pow-
er supply are abnormal.
2) The contactor is abnor-
mal.
3) The lightning protection
board is abnormal.
1) Replace the faulty drive board or
power supply board.
2) Replace the faulty contactor.
3) Replace the lightning protection
board.
Err18
Current detection
fault
1) The hall is abnormal.
2) The drive board is abnor-
mal.
1) Replace the hall device.
2) Replace the drive board.
Err19
Motor auto-tuning
fault
1) The motor parameters
are not set according to
the nameplate.
2) Motor auto-tuning times
out.
1) Set the motor parameters accord-
ing to the nameplate properly.
2) Check the cables connecting the
AC drive and the motor.
Err21
EEPROM read-
write fault
The EEPROM chip is dam-
aged.
Replace the main control board.
Err23
Short circuit to
ground
The motor is short circuited
to the ground.
Replace the cable or motor.
Err26
Accumulative run-
ning time reached
The accumulative running
time reaches the setting
value.
Clear the record through parameter
initialization.
Err29
Accumulative pow-
er-on time reached
The accumulative power-on
time reaches the setting
value.
Clear the record through parameter
initialization.
Err40
Pulse-by-pulse
current limit fault
1) The load is too heavy or
locked-rotor occurs on
the motor.
2) The AC drive model is of
too low power rating.
1) Reduce the load and check the
motor and mechanical conditions.
2) Select an AC drive of higher power
rating.
