Dometic CRX Installation And Operating Manual page 33

CRX
Number of
Fault
flashes
5 Overheating of the elec-
tronics unit
Constantly Temperature sensor
errors
CRX110, CRX140
Number of
Fault
flashes
1 Low Voltage
2 Excessive fan current
3 The motor doesn't start The rotor is jammed.
4 Speed too low
5 Overheating of the elec-
tronics unit
Constantly Temperature sensor
errors
Compressor does not run (battery connection)
Problem
U = 0 V
Term
≤ U
U
Term ON
EN
Possible cause
If the cooling system is loaded too heavily or
the temperature is set too high, the electron-
ics can overheat.
Temperature sensor is defective.
Possible cause
The supply voltage is outside of the set range.
The fan load on the electronics unit is more
than 1 A.
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 electron-
ics can overheat.
Temperature sensor is defective.
Possible cause
There is an interruption in the
battery – electronics connection
Main switch faulty (if installed)
Additional supply line fuse has blown
(if installed)
Battery voltage is too low
Troubleshooting
Remedy
Establish a connection
Replace the main switch
Replace the supply line
fuse
Charge the battery
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