Troubleshooting - Dometic CoolMatic CRX 65 Installation And Operating Manual

CRX50, CRX65
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Troubleshooting

The significance of the red LED (fig. 3 2, page 4)
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 Low Voltage
2 Excessive fan current
Too many start attempts The compressor or fan has been started too
3 The motor doesn't start The rotor is jammed.
4 Speed too low
5 Overheating of the
electronics unit
Constantly Temperature sensor
errors
EN
Possible cause
The supply voltage is outside of the set range
The fan load on the electronics unit is more
than 1 A
often within a short period of time
The pressure difference in the cooling system
is too high (> 5 bar)
If the cooling system is overloaded, the mini-
mum speed of the motor of 1,850 rpm can-
not be maintained
If the cooling system is loaded too heavily or
the temperature is set too high, the electron-
ics can overheat
Temperature sensor is defective
Troubleshooting
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