Troubleshooting - Dometic CoolMatic MDC065 Operating Manual

Troubleshooting

12 Troubleshooting
The significance of the red LED (fig. 1 2, page 3)
For operational faults it illuminates several times. The number of pulses depends on
the type of fault.
Each flash lasts for one quarter of a second. After the series of impulses a pause
follows. The sequence for the fault is repeated every four seconds.
Number of
Fault
flashes
1 Supply voltage
2 Excessive fan current
3 The motor doesn't start
4 Speed too low
5 Overheating of the
electronics unit
Interior temperature too low in control level "1"
Fault
Compressor runs
constantly
Compressor runs for a
long time
20
Possible cause
Faulty thermostat
Large quantities have been frozen in
the freezer compartment
Possible cause
The supply voltage is outside of the set
range.
The fan loads the electronics unit with
more than 1 A.
The rotor is jammed.
The pressure difference in the cooling
system is too high (> 5 bar).
If the cooling system is overloaded, the
minimum speed of the motor of
1850 RPM cannot be maintained.
If the cooling system is loaded too
heavily or the temperature is set too
high, the electronics can overheat.
Remedy
Change the thermostat
–
MDC
EN