Sako SKI780 - 7.3 Troubleshooting

7.3 Troubleshooting
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 ts faulty.
1: Check the
power supply.
2: Check the bus
voltage.
l No display 3: The rectifier bridge is damaged. 3: Re-connect the
at power-on. 4: Inverter buffer resistance damage.
8-core and 28-core
5: The control board or the operation
panels faulty. oles. t
6: The cable connecting the control et nical slipport
board and the drive board and the ,
operation panel breaks.
1: The cable between the drive board
and the control board ts in poor contact.
2: Related components on the control 1: Re-connect the
"780" 1s displayed board are damaged. 8-core and 28-core
2 at poweron 3: The motor or the motor cable is short | cables.
. circuited to the ground. 2: Contact
4: The HALL device ts faulty. technical support.
5: The power input to the AC drive is too
low.
1: Measure the
insulation of the
"Err23" 1s 1: The motor or the motor output cable ts | motor and the
3 | displayed at short-circuited to the ground. output cable with
power-on. 2: The AC drive is damaged. amegger.
2: Contact
technical support.
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 1s
short circuited.
1: Replace the
damaged fan.
2: Eliminate
external fault.
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