IceDry 800/1400
7
Fault tracing
7.1 General
The purpose of this chapter is to provide guidance in basic fault tracing and provide instructions for
corrective actions to remedy any faults. Go through the list below before contacting Munters Service.
7.2 Safety
W
W
WARNING!
ARNING!
ARNING!
Adjustments, maintenance and repairs must only be carried out by qualified personnel.
W
W
WARNING!
ARNING!
ARNING!
Always switch off the main power switch before removing the unit's panels.
7.3 Fault tracing list
See the wiring diagram for identification of electrical components.
Fault
symptom
Indica-
tors
Possible cause
Corrective action
Power supply failure.
Check the power supply to the unit.
If the time of the power failure is not known see section
Restart after power
failure
or call Munters Service before start up.
Circuit breaker QM25 tripped due
to a wiring fault.
If observed immediately, reset the circuit breaker.
Main power switch (no.1) is set to
”0”.
Set the main supply switch to ”1” and check that the main connection
indicator (no.14) is lit.
Unit has
stopped.
All off.
Transformer TC25 fuse FU26
failure.
Investigate the cause of the fault, and rectify. Replace the fuse. If the fault
re-occurs, contact Munters.
Circuit breaker QM25 tripped due
to a wiring fault.
Investigate the cause of the fault, and rectify. Reset QM25.
Unit has
stopped.
No. 12
does not
flash.
The unit has been set to
AUTomatic mode by mistake.
Set the mode switch to
MAN
ual, and check that the unit starts.
Unit has
stopped.
No. 12,
6 and
7 are
flashing.
If both indicators 6 and 7 are
flashing, it indicates that
one (or both) of the high
temperature cut-outs (BT27
and BT30) have tripped, due
to either an obstruction in the
reactivation airflow, or because
the reactivation airflow has been
set too low.
Leave the unit to cool down.
Reset QM12 and QM14 circuit breakers as required.
Check that the air inlet and outlet ducts and filters are free from obstructions
and are not blocked by ice or dirt.
Set the main supply switch to ON to reset the fault warning. Adjust the
reactivation airflow.
Switch off the main supply and allow the unit to cool down.
Investigate the cause of the fault, and rectify.
Reset QM12 and QM14 as required.
Unit has
stopped.
No. 12
and
either 6
or 7 are
flashing.
Safety device have tripped due to
a heater element or wiring fault.
Switch on the main supply at the main supply switch to reset the fault
warning.
NOTE! The main power switch must be on for at least 12 hours before
the start. This time is required to let the internal heat equipment remove
possible ice built up.
24
Fault tracing
190TGB-1037-G1307
