CRX Troubleshooting
33
CRX110, CRX140
Compressor does not run (battery connection)
5 Overheating of the elec-
tronics unit
If the cooling system is loaded too heavily or
the temperature is set too high, the electron-
ics can overheat.
Constantly Temperature sensor
errors
Temperature sensor is defective.
Number of
flashes
Fault Possible cause
1 Low Voltage The supply voltage is outside of the set range.
2 Excessive fan current The fan load on the electronics unit is more
than 1 A.
3 The motor doesn't start The rotor is jammed.
The pressure difference in the cooling system
is too high (> 5 bar).
4 Speed too low If the cooling system is overloaded, the
minimum speed of the motor of 1850 rpm
cannot be maintained.
5 Overheating of the elec-
tronics unit
If the cooling system is loaded too heavily or
the temperature is set too high, the electron-
ics can overheat.
Constantly Temperature sensor
errors
Temperature sensor is defective.
Problem Possible cause Remedy
U
Term
= 0 V There is an interruption in the
battery – electronics connection
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
Term
≤ U
ON
Battery voltage is too low Charge the battery
Number of
flashes
Fault Possible cause
CRX50-65-80-110-140_IOM_EMEA16.book Seite 33 Mittwoch, 15. Juli 2020 12:51 12
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