CRX Troubleshooting
31
12 Troubleshooting
The significance of the red LED (fig. 6 2, page 5, fig. 7 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
follows. The sequence for the fault is repeated every four seconds.
CRX50, CRX65, CRX80
Number of
flashes
Fault Possible cause
1 Line 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
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.
Constantly Temperatur sensor
errors
Temperatur sensor is defective.
CRX50-65-80-110-140-IO-US.book Seite 31 Mittwoch, 4. Januar 2017 4:26 16
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