Dometic Coolmatic CR50 Operating Manual page 29

CoolMatic
Interior temperature too low in control level "1"
Fault
Compressor runs
constantly
Compressor runs for a long
time
Compressor does not run (battery connection)
Fault
U = 0 V
TERM
≤ U
U
TERM ON
Start attempt with
≤ U
U
TERM OFF
Start attempt with
≥ U
U
TERM ON
Electric circuit between the
pins in the compressor
interrupted
U Voltage between the positive and negative terminals of the electronics
TERM
U Cut-in voltage of the electronics
ON
U Cut-off voltage of the electronics
OFF
EN
Possible cause
Faulty thermostat
Large quantities have been frozen in the
freezer compartment
Possible cause
There is an interruption in the connection
between the battery and the electronics
Main switch faulty (if installed)
Additional supply line fuse has blown (if
installed)
Battery voltage is too low
Loose cables
Poor contact (corrosion)
Battery capacity too low
Cable cross section too small
Ambient temperature too high
Insufficient ventilation and/or air supply
Condenser is dirty
Defective compressor
Troubleshooting
Remedy
Change the thermostat
–
Remedy
Establish a connection
Replace the main switch
Replace the supply line fuse
Charge the battery
Establish a connection
Replace the battery
Replace the cable (fig. e,
page 8)
–
Move the refrigerator to
another location
Clean the condenser
Replace the compressor
29