EFD MINAC 25 Twin, User Manual, Page: 41 / 42

MINAC Systems Revision A
USER MANUAL 31 January 2005
63860.doc
© For reproduction rights, see cover page. Page 38
Alarm Probable Cause Corrective Action
Power on by startup
There was a “Power on
command” detected by the
control system during
startup. Release any stuck power-on buttons,
and press the RESET button to make
the unit ready for use.
DC Over-voltage
detected
On twin units this alarm
will stop both outputs
There was a high voltage
peak on the DC capacitor.
Ground fault detected
On twin units this alarm
will stop both outputs
– The induction coil was
grounded.
– The HHT had an internal
flash over
– Internal circuits are
shorted to ground.
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.
Fuse Fan
Indicates current limiter
for the internal cooling
fans is active.
On twin units this alarm
will stop both outputs
Broken fan motor. Any failure on the internal electronic
circuits has to be repaired by qualified
personnel.
System reset by
Watch Dog
Timeout
On twin units, this
alarm is activated in
both outputs.
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. 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.
Overtemp Inverter
Indicates too high
temperature at the
inverter heat sink .
On twin units this alarm
will stop both outputs
Clogged water channels in
inverter.
Damaged transistors in
inverter.
Electronics fault.
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.