MD380 User Manual Maintenance and Troubleshooting
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Table 9-2 Troubleshooting to common faults of the AC drive
SN )ault Possible Causes Solutions
1
There is no display
at power-on.
1: T
here is no power supply to the
AC drive or the power input to the
AC drive is too low.
2: T
he power supply of the switch
on the drive board of the AC drive is
faulty.
3: The recti¿er bridge is damaged.
4: The control board or the
operation panel is faulty.
5: T
he cable connecting the control
board and the drive board and the
operation panel breaks.
1: Check the power supply.
2: Check the bus voltage.
3: Re-connect the 8-core and
28-core cables.
4: Contact the agent or Inovance
for technical support.
2
³
H
C
”
is displayed
at power-on.
1: T
he cable between the drive
board and the control board is in
poor contact.
2: Related components on the
control board are damaged.
3: T
he motor or the motor cable is
short circuited to the ground.
4: The HALL device is faulty.
5: T
he power input to the AC drive
is too low.
1: Re-connect the 8-core and
28-core cables.
2: Contact the agent or Inovance
for technical support.
3
³
Err23
”
is displayed
at power-on.
1: T
he motor or the motor output
cable is short-circuited to the
ground.
2: T
he AC drive is damaged.
1: Measure the insulation of the
motor and the output cable with
a megger.
2: Contact the agent or
Inovance for technical support.
4
The A
C drive
display is normal
upon power-
on. %ut
³
HC
”
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 (module
overheat) fault
is reported
frequently.
1: The setting of carrier frequency is
too high.
2: T
he cooling fan is damaged, or
the air ¿lter is blocked.
3: Components inside the AC drive
are damaged (thermal coupler or
others).
1: Reduce the carrier frequency
()0-15).
2: Replace the fan and clean the
air ¿
lter.
3: Contact the agent or Inovance
for technical support.
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