EFD MINAC 25 Twin User Manual page 41

MINAC Systems
USER MANUAL
63860.doc
Alarm
Power on by startup
DC Over-voltage
detected
On twin units this alarm
will stop both outputs
Ground fault detected
On twin units this alarm
will stop both outputs
Fuse Fan
Indicates current limiter
for the internal cooling
fans is active.
On twin units this alarm
will stop both outputs
System reset by
Watch Dog
Timeout
On twin units, this
alarm is activated in
both outputs.
Overtemp Inverter
Indicates too high
temperature at the
inverter heat sink .
On twin units this alarm
will stop both outputs
© For reproduction rights, see cover page.
Probable Cause
There was a "Power on
command" detected by the
control system during
startup.
There was a high voltage
peak on the DC capacitor.
– The induction coil was
grounded.
– The HHT had an internal
flash over
– Internal circuits are
shorted to ground.
Broken fan motor.
For safety reasons, the
micro controller is reset
automatically if a software
or hardware condition
stops it from operation. The
unit will be restored as after
a startup. After such a
reset, this alarm will be
active.
Clogged water channels in
inverter.
Damaged transistors in
inverter.
Electronics fault.
Revision A
31 January 2005
Corrective Action
Release any stuck power-on buttons,
and press the RESET button to make
the unit ready for use.
1. Check the main voltage supply for
noise peaks from other equipment
connected to the same line.
2. Make sure that the induction coil is
not connected to ground during
heating.
3. Have the HHT replaced by qualified
personnel.
4. Any failure on the internal electronic
circuits must be repaired by qualified
personnel.
Any failure on the internal electronic
circuits has to be repaired by qualified
personnel.
1. Press the RESET button to make
the unit ready for use.
2. Any failure on the internal electronic
circuits must be repaired by
qualified personnel only.
1. Press the RESET button to make
the unit ready for use if possible.
2. Inspect water flow in inverter.
3. Any failure on the internal electronic
circuits has to be repaired by
qualified personnel.
Page 38