T r o u b l e s h o o t i n g
Power Module DN
Version 09.2019
Page 32/43
9
Troubleshooting
9.1 Ready lamp dark / no Ready signal:
•
Coil module monitoring M8
not connected
•
Coil module connector
not connected
•
„S1 Enable“ on Interface board on position „EXT.“
and
no signal (+24VDC) on
External
enable
(PIN10)
9.2 Active lamp flashing / Active Signal flashing (5 Hz)
•
Coil lamp flashes yellow
•
Coil is hot / close overheating. Operation remains possible
•
Check Connection
Temp 2 Sensor
in Connection Box coil module
9.3 Fault lamp flashing / Fault Signal flashing (5 Hz)
•
Overheating of coil module: too low cycle time leads to overheating of the coil. A
temperature switch blocks further pulse triggering. After cool-down, pulse triggering is
enabled again.
o
Ready
lamp dark/signal LOW, Connection box lamp red flashing
o
Cool down coil and possibly decrease cycle time
9.4 Fault lamp indicates / +24VDC on Fault signal:
•
Switch off, wait 30 seconds, switch back on
•
Check power supply inverter. In DN750-1850 check motor circuit breaker
•
If
Fault
still indicates: open DN, record error message, contact Maurer Magnetic AG
9.5 Process OK lamp dark / no Process OK signal:
•
Process monitoring only works at 100% power setting (optional)
•
Check
Ready
signal
•
Check
Active
signal during demagnetization
•
In combination with a VE coil module the coil current decreases with increasing
ferromagnetic material in the coil. In extreme cases the current does not reach the
target value and the
Process OK
is not triggered. To avoid this the machine can be
configured by Maurer Magnetic AG for specific parts.
•
Process monitoring relay defect/manipulation
•
Demagnetization pulse check with oscilloscope. See below