Dometic CB40 Operating Manual page 18

Troubleshooting
Interior temperature too low in control setting "1"
Fault
Compressor runs
constantly
Compressor runs for a
long time
Cooling capacity drops, interior temperature rises
Fault
Compressor runs for a
long time/continuously
Compressor runs
infrequently
Unusual noises
Fault
Loud humming
18
Possible cause
Thermostat sensor has no contact to
the vaporiser
Thermostat defective
Short circuit in the thermostat line
A large amount has frozen solid in the
device (only CB36, CB40)
Possible cause
Vaporiser iced over
Ambient temperature too high
Insufficient ventilation
Condenser is dirty
Fan defective (if installed)
Battery capacity exhausted
Possible cause
A component of the refrigerant circuit
cannot move freely (lies against the
wall)
Foreign body jammed between the
cooling device and the wall
Fan noise (if installed)
CB, RHD
Remedy
Secure the sensor
Change the thermostat
–
Remedy
Defrost the vaporiser
–
Move the cooling device
Clean the condenser
Replace the fan
Charge the battery
Remedy
Bend the component
carefully
Remove the foreign body
–
EN