Dometic COOLMATIC CD20 Installation And Operating Manual page 17

CD20, CD30
Interior temperature too low in the "MIN" thermostat setting
Feature
Compressor runs con-
tinuously
Compressor runs for a
long time
Cooling capacity drops, interior temperature rises
Feature
Compressor runs for a
long time/continuously
Compressor does not
run often
Unusual noises
Feature
Loud humming
EN
Possible cause
Thermostat sensor has no contact to the
vaporiser
Short circuit in the thermostat line
Thermostat defective
Large quantities have been frozen in the
vaporiser compartment
Possible cause
Vaporiser iced over
Cooling area insulation is insuffi-
cient (moist/wet)
Ambient temperature too high
Insufficient ventilation
Condensor is dirty
Fan defective (if installed)
Battery capacity exhausted
Possible cause
A component of the refrigerant
circuit cannot move freely
(touching the wall)
Foreign body jammed between
the cooling unit and the wall
Fan noise
Troubleshooting
Remedy
Secure the sensor
Change the thermo-
stat
Remedy
Defrost the vaporiser
Adjust/replace the drawer seal
Ensure that the device is suffi-
ciently ventilated
Clean the condenser
Replace the fan
Charge the battery
Remedy
Bend the component carefully
away from the obstruction
Remove the foreign body
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