6 Troubleshooting
- 83 -
Fault Name
Operating
Panel
Display
Cause
Possible Solution
EEPROM read-
write fault
E 21.01
EEPROM read/write
is abnormal.
1. If the writing is done through
communication, ensure that you use the RAM
address of the parameter. For the mapping
rules of all RAM addresses to parameters, see
Appendix A "Group AF: Process Data Address
Mapping".
2. The EEROM chip is damaged. Contact the
manufacturer to replace the control board.
E 21.02
E 21.03
E 21.04
Motor auto-
tuning warning
E 22.00
The asynchronous
motor stator
resistance after
auto-tuning is over
range.
Set Group F1 (Motor 1 Parameters) according
to the motor nameplate.
Perform auto-tuning when the motor is
stopped.
E 22.01
The asynchronous
motor rotor
resistance after
auto-tuning is over
range.
E 22.02
The asynchronous
motor no-load
current and
mutual inductive
reactance are over
range. The no-load
current and mutual
inductive reactance
is calculated
according to the
motor parameters
and may be slightly
inaccurate.
Set Group F1 (Motor 1 Parameters) according
to the motor nameplate.
Confirm the motor is disconnected from the
load.
E 22.03
The synchronous
motor back EMF
after auto-tuning is
over range.
Set F1-02 (Rated motor voltage) according to
the motor nameplate.
Confirm the motor is disconnected from the
load.
E 22.04
Inertia auto-tuning
is faulty.
Set F1-03 (Rated motor current) according to
the motor nameplate.
Short circuit to
ground
E 23.00
The motor is short-
circuited to the
ground.
Replace the cable or motor.
Phase to phase
short circuit
E 24.00
Phase to phase short
circuit occurs on the
motor.
Check whether short-circuit occurs on the
output UVW.
