EN
CoolMatic MR07, MRR07, MH07
Troubleshooting
35
11
Troubleshooting
Compressor does not run
Poor cooling, interior temperature increases
Fault
Possible cause
Remedy
U
TERM
= 0 V
There is an interruption in the connec-
tion between the battery and
the electronics
Establish a connection
Additional supply line fuse has blown
(if installed)
Replace the supply line
fuse
U
TERM
≤
U
ON
Battery voltage is too low
Charge the battery
Start attempt with
U
TERM
≤
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
(fig.
8
, page 6)
Start attempt with
U
TERM
≥
U
ON
Ambient temperature too high
–
Insufficient ventilation and/or air sup-
ply
Move the refrigerator 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
This can only be repaired
by an authorised
customer services unit.
U
TERM
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 for a
long time/continuously
Vaporiser is iced over
Defrost the vaporiser
Ambient temperature too high
–
Insufficient ventilation and/or air sup-
ply
Move the refrigerator to
another location
Condenser is dirty
Clean the condenser
Fan defective (if installed)
Replace the fan
Compressor runs
intermittently
Battery capacity exhausted
Charge the battery