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CoolMatic CRF-50
11
Troubleshooting
Compressor does not run
Fault
U
= 0 V
KL
≤ U
U
KL
ON
Start attempt with
≤ U
U
KL
OFF
Start attempt with
≥ U
U
KL
ON
Electric circuit between
the pins in the compres-
sor interrupted
Usage when the ambi-
ent temperature is too
low
U
Voltage between the positive and negative terminals of the electronics
KL
U
Cut-in voltage of the electronics
ON
U
Cut-off voltage of the electronics
OFF
Interior temperature too low in control level "1"
Fault
Compressor runs con-
stantly
Compressor runs for a
long time
Possible cause
There is an interruption in the con-
nection 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
Fan defective (if installed)
Defective compressor
The compressor only starts up at an
ambient temperature of more than
+16 °C.
Possible cause
Thermostat sensor has no contact on
the vaporiser
Faulty thermostat
Large quantities have been frozen in
the freezer compartment
Troubleshooting
Remedy
Establish a connection
Replace the main switch
Replace the supply line
fuse
Charge the battery
Establish a connection
Replacing the battery
Replace the cable
(fig. 8, page 6)
–
Move the freezer to
another location
Clean the condenser
Replace the fan
Replace the compressor
Only switch on the freezer
at an ambient temperature
of more than +16 °C.
Remedy
Secure the sensor
Change the thermostat
–
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