EN
Troubleshooting
CRX
26
10
Troubleshooting
The significance of the red LED (fig.
2
2, page 9)
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
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 Too many compressor or fan starts in short
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
minimum speed of the motor of 1,850 rpm
cannot be maintained.
5
Overheating of the
electronics unit
If the cooling system is loaded too heavily
or the temperature is set too high,
the electronics can overheat.
flashes constantly Temperature sensor
errors
Temperature sensor is defective.
CRX65D-IO-EN.book Seite 26 Freitag, 21. Dezember 2018 9:10 09
