EM12 User’s Manual
7. Fault Diagnosis and Solution
119
SN
Fault
Possible Causes
Solutions
1
There is no display at
power-on.
1: There is no power supply to the frequency
inverter or the power input to the frequency
inverter is too low.
2: The power supply of the switch on the
drive board of the frequency inverter is
faulty.
3: The rectifier bridge is damaged.
4: The control board or theoperation panel is
faulty.
5: The cable connecting the control board
and the drive board and the operation panel
loose or breaks.
1: Check the power supply.
2: Check the DC bus voltage.
3:Check the internal wiring plug
4: Change a keypad
5: Ask for technical support.
2
“-coc-” is displayed
at power-on.
1: The cable between the drive board and the
control board is in poor contact.
2: Related components on the control board
are damaged.
3: The motor or the motor cable is short
circuited to the ground.
4: The HALL device is faulty.
5: The power input to the frequency inverter
is too low.
1: Checking wiring
2: Ask for technical support.
3
“Err23” is displayed
at power-on.
1: The motor or the motor output cable is
short-circuited to the ground.
2: The frequency inverter is damaged.
1: Measure the insulation of the
motor and the output cable with a
megger.
2: Ask for technical support.
4
The frequency
inverter display is
normal after
power-on. But “coc-”
is displayed after
running and stops
immediately.
1:The cooling fan is damaged or
locked-rotor occurs.
2: The external control terminal cable is
short circuited.
1: Replace the damaged fan.
2: Eliminate external fault.
5
Err14 ( IGBT module
overheat) fault is
reported frequently.
1: The setting of carrier frequency is too
high.
2: The cooling fan is damaged, or the air
filter is blocked.
3: Components inside the frequency inverter
are damaged (thermal coupler or others).
1: Reduce the carrier frequency
(d6-00).
2: Replace the fan and clean the
air filter.
3: Ask for technical support.
6
The motor does not
rotate after the
frequency inverter
runs.
1: Check the motor and the motor cables.
2: The frequency inverter parameters are set
improperly (motor parameters).
3: The cable between the drive board and the
control board is in poor contact.
4: The drive board is faulty.
1: Ensure the cable between the
Frequency inverter and the motor
is normal.
2: Replace the motor or clear
mechanical faults.
3: Check and re-set motor
parameters.
7
The DI terminals are
disabled.
1: The parameters are set incorrectly.
2: The external signal is incorrect.
3: The jumper bar across OP and+24 V
becomes loose.
4: The control board is faulty.
1: Check and reset the parameters
in group F4.
2: Re-connect the external signal
cables.
3: Re-confirm the jumper bar
across OP and +24 V.
4: Ask for technical support.
8
The motor speed is
always low in VC
mode.
1: The encoder is faulty.
2: The encoder cable is connected
incorrectly or in poor contact.
1: Replace the encoder and
ensure the cabling is proper.
2: Replace the PG card.
Содержание EM12 Series
Страница 5: ......
