Munters ML180, Руководство пользователя

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ML180-MLT350 Dehumidifiers
24
5 Fault Finding
190TGB-1034-A
Figure 5-1. Control Panel
Fault
Symptom
Indicators Possible cause Action
Unit has
stopped All off Power supply failure
Transformer TC18 fuse FU18 failure.
Check power supply to the unit.
Investigate the cause of the fault and rectify. Reset the fuse.
Unit has
stopped No.3 & 4 are
on Unit switched to AUTOmatic mode by
mistake with no humidistat connected.
Humidistat fault (AUTOmatic mode).
Set the mode switch to MANual mode and check that the
dehumidifier starts.
Set the mode switch to MANual mode and check that the
unit starts. If the unit starts, the humidistat is probably at
fault.
Set the mode switch to AUTOmatic mode and check the
humidistat by seeing if the dehumidifier starts when the
humidistat set-point is reduced.
Reset the humidistat set-point after the check. Calibrate the
humidistat (in accordance with the manufacturer’s
recommendations) if necessary or replace.
Unit has
stopped No.5 & 3 are
on High temperature cut-out (BT20) has
tripped.
Reactivation airflow is set too low.
Switch off the mains supply and allow the unit to cool down.
Check that the air inlet, outlet ducts and filters are free from
obstructions and are not clogged with dirt.
Reset the cut-out when the unit has cooled down.
Reset the cut-out.
Restart the unit and adjust the reactivation airflow,
see section
2.15, Airflow Check and Adjustment .
Unit has
stopped No.5, 3 & 4
are on ML180 & MLT350: Circuit Breaker QM12
tripped due to a drive motor, fan fault or
reactivation heater fault.
ML270: Circuit Breaker QM12 tripped due
to a drive motor or fan motor fault. Circuit
Breaker QM15 tripped due to a reactivation
heater fault.
Air cooled condenser models:
ML180 & MLT350: Circuit Breaker QM12
tripped due to a drive motor, fan fault,
condenser fan fault or a condenser heater
fault.
ML270: Circuit Breaker QM12 tripped due
to a drive motor, fan fault, condenser fan
fault or a condenser heater fault. Circuit
Breaker QM15 tripped due to a reactivation
heater fault.
Switch off the mains supply and allow the unit to cool down.
Reset Circuit Breaker QM12 . Investigate the cause of the
fault and rectify or call Munters Product Service.
Switch off the mains supply and allow the unit to cool down.
Reset Circuit Breakers QM12 and QM15. Investigate the
cause of the fault and rectify or call Munters Product
Service.
Investigate the cause of the fault and rectify or call Munters
Product Service. Reset QM12.
Investigate the cause of the fault and rectify or call Munters
Product Service. Reset QM12 and QM15.
Loss of
performance:
Dehumidifier
appears to
be operating
correctly, but
is not
controlling
the humidity Heating capacity is too low.
Reactivation and process airflows are not
in accordance with the rated airflow.
Rotor drive failure.
Humidistat or RH98 not functioning
correctly (AUTOmatic mode).
Check the operation of the heater.
Measure and adjust the reactivation and process airflows,
see section 2.15, Airflow Check and Adjustment
.
Check rotor drive belt and drive motor.
Check the operation and calibration of the humidistat or
RH98 in accordance with the manufacturer’s
recommendations.
Table 5-1. Fault localization
MAN
AUTO
1 2
3 4 5 6