Sako V780 - Faults and Solutions

65
7.3 Troubleshooting
1
No display
at power-on.
1: There is no power supply to the AC
drive or the power input to the AC drive
is too low.
2: The power supply of the switch on the
drive board of the AC drive is faulty.
3: The recti󽗉er bridge is damaged.
4: Inverter bu󽗈er resistance damage.
5: The control board or the operation
panel is faulty.
6: The 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
technical support.
2
"780" 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 AC drive is too
low.
1: Re-connect the
8-core and 28-core
cables.
2: Contact
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 AC drive is damaged.
1: Measure the
insulation of the
motor and the
output cable with
a megger.
2: Contact
technical support.
4
The AC drive
display is normal
upon poweron.
But "780" 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.