Dantherm CDT 90, Service Manual

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Fault finding
Fault finding
Use this table to identify and remedy a problem or fault:
Problem Cause Action
•
Dehumidifier does not
operate
•
The ON/OFF lamp
does not show a green
light
No power input Check that the power ca-
ble is correctly connected
to power source and unit.
If the power cable is con-
nected, check the branch
fuse
If a hygrostat is connected
as accessory:
The setpoint value of the
hygrostat is too high Reduce setpoint value. If
the dehumidifier does not
operate, remove the hy-
grostat. If the dehumidifier
now operates, it means
that the hygrostat is defec-
tive
•
Dehumidifier does not
operate
•
Green control lamp
illuminates
Room temperature is be-
low 3 °C/37.4 °F and the
dehumidifier is automati-
cally put out of operation Wait for the temperature to
rise above 3 °C/37.4 °F
•
Red control lamp illu-
minates
Pressure/temperature in
the high-pressure side of
the cooling system is too
high Check the filter and dehu-
midifier for accumulation of
dirt.
Check that the fan is work-
ing
Note
•
Shut the dehumidifier down immediately, if it is not operating correctly!
•
Wait one minute before starting to locate the fault as the electronic equipment may
have switched off the dehumidifier for safety reasons
Further help
Contact a Dantherm Air Handling dealer if the dehumidifier does not start again. This is
also applicable when the dehumidifier is operating without extracting water which is
probably a defect in the cooling circuit. Contact a service technician to remedy the de-
fect.