Dometic Coolmatic CR50 Operating Manual page 30

Troubleshooting
Compressor is not running (connected to AC supply)
Fault
No voltage
Voltage is present but the
compressor doesn't run
Electric circuit between the
pins in the compressor
interrupted
Poor cooling, interior temperature increases
Fault
Compressor runs for a long
time/continuously
Compressor runs
intermittently
Unusual noises
Fault
Loud humming
30
Possible cause
Interruption in the supply cable
Main switch faulty (if installed)
Additional supply line fuse has blown (if
installed)
Ambient temperature too high
Insufficient ventilation and/or air supply
Condenser is dirty
Defective compressor
Possible cause
Ambient temperature too high
Insufficient ventilation and/or air supply
Condenser is dirty
Faulty fan
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
CoolMatic
Remedy
Establish a connection
Replace the main switch
Replace the supply line fuse
–
Move the refrigerator to
another location
Clean the condenser
Replace the compressor
Remedy
–
Move the refrigerator to
another location
Clean the condenser
Replace the fan
Charge the battery
Remedy
Bend the component
carefully away from the
obstruction
Remove the foreign body
–
EN