Issue 08/2013
Page 124
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Operation
Troubleshooting
6.10.7
Insulation faults arose
LEDs 4+5+6 flash at the same time
If LEDs 4+5+6 flash at the same time when switching on or operating the
machine, the built-in insulation monitor will detect an insulation fault. If this
message is active, a magnet restart block is automatically active, i.e. after
putting the load down, the operator is no longer able to switch the magnet
on again.
The insulation monitor (optional) offers additional protection and enables
the early detection of hidden faults / magnetic faults. An insulation monitor
offers the early detection of a critical fault with the connected load. If these
faults remain undetected and a second fault arises in the system, this can
lead to uncontrolled shut-downs of the machine due to short circuits.
This message will not clear until after a system restart.
Ö
Troubleshooting measures
>
Switch off the drive unit and secure against being switched on again
(e.g. remove the ignition key and keep it in a safe place).
>
Check the connection line to the magnet for abrasion / open contacts.
>
Check the plug contacts to the magnet for water or clean and dry the plug
connections.
>
When using turntable systems with slip rings, check the degree of wear for
dirt and moisture.
>
Have the lifting magnet tested by an electrician for insulation faults using
an insulation tester with measurement voltage 500 V d.c.
>
Carry out the system restart.
Ö
>
Check the system / magnets directly with a new load cable.
>
If the fault persists, please get in touch with the manufacturer or a party
authorised by the manufacturer.
