Troubleshooting
CoolMatic CRF-50
32
11
Troubleshooting
Compressor does not run
Interior temperature too low in control level “1”
Fault
Possible cause
Remedy
U
KL
= 0 V
There is an interruption in the con-
nection between the battery and the –
electronics
Establish a connection
Main switch faulty (if installed)
Replace the main switch
Additional supply line fuse has blown
(if installed)
Replace the supply line
fuse
U
KL
≤
U
ON
Battery voltage is too low
Charge the battery
Start attempt with
U
KL
≤
U
OFF
Loose cables
Poor contact (corrosion)
Establish a connection
Battery capacity too low
Replacing the battery
Cable cross section too small
Replace the cable
(
8
, page 6)
Start attempt with
U
KL
≥
U
ON
Ambient temperature too high
–
Insufficient ventilation and/or air
supply
Move the freezer to
another location
Condenser is dirty
Clean the condenser
Fan defective (if installed)
Replace the fan
Electric circuit between
the pins in the compres-
sor interrupted
Defective compressor
Replace the compressor
Usage when the ambient
temperature is too low
The compressor only starts up at an
ambient temperature of more than
+16 °C.
Only switch on the freezer
at an ambient temperature
of more than
+16 °C.
U
KL
Voltage between the positive and negative terminals of the electronics
U
ON
Cut-in voltage of the electronics
U
OFF
Cut-off voltage of the electronics
Fault
Possible cause
Remedy
Compressor runs con-
stantly
Thermostat sensor has no contact on
the vaporiser
Secure the sensor
Faulty thermostat
Change the thermostat
Compressor runs for a
long time
Large quantities have been frozen in
the freezer compartment
–
CRF-50.book Seite 32 Donnerstag, 13. Dezember 2007 12:19 12
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