EN
CRX
Troubleshooting
33
12
Troubleshooting
The significance of the red LED (fig.
2, page 6)
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 fol-
lows. The sequence for the fault is repeated every four seconds.
CRX50, CRX65, CRX80
CRX110, CRX140
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.
Too many start attempts The compressor or fan has been started too
often within a short period of time.
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 mini-
mum speed of the motor of 1,850 rpm can-
not 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.
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.
CRX50-65-80-110-140-IO-US.book Seite 33 Mittwoch, 15. Juli 2020 10:16 10
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