Fault Tracing List - Munters MCS300 User Manual

MCS300

6.3 Fault tracing list

Go through the following fault tracing list below before contacting Munters' product service department.
The list provides help in identifying types of faults that are easy to remedy without the assistance of specially
trained personnel
Fault symptom Possible Cause
Unit has stopped. On-off switch turned off by mistake.
No mains power to unit.
Dehumidifier switched to automatic mode
by mistake with no humidistat connected.
Humidistat fault (automatic modes).
Dehumidifier has stopped Thermostat for reactivation heater has
and fault indication is tripped.
blinking.
Dehumidifier is running Warning for abnormal reactive temperature
and constant fault increase.
indication.
Dehumidification Airflows are faulty.
capacity has diminished.
Humidistat not functioning properly
(automatic modes)
Table 6.1 Fault tracing list
190TEN-1027- F1404
Corrective action
Place the on-off switch in the on position and check that
dehumidifier starts.
Check mains power to unit.
Set the operating mode to manual mode and check that the
dehumidifier starts.
Set the operating mode to manual mode and check that the unit
starts. If the unit starts, the humidistat is probably at fault.
Check the humidistat by seeing if the dehumidifier starts
when the humidistat setpoint is reduced. Reset the humidistat
setpoint after the check. Calibrate the humidistat if necessary.
Contact Munters' product service department.
Check that filters and ducting for incoming air are not blocked by
foreign objects or plugged by dirt. Increase reactivation air flow
by slowly opening the damper.
Check ducting and filters for blockage and leakage.
Check humidistat function and calibrate as required. Contact
Munters product service department.
Fault tracing
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