Troubleshooting
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
Fault
flashes
1
Line Voltage
2
Excessive fan current
Too many start attempts Too many compressor or fan starts in short
3
The motor doesn't start The rotor is jammed.
4
Speed too low
5
Overheating of the
electronics unit
flashes constantly Temperatur sensor
errors
Compressor does not run (battery connection)
Problem
U
= 0 V
Term
≤ U
U
Term
ON
Start attempt with
≤ U
U
Term
OFF
26
Possible cause
The supply voltage is outside of the set range.
The fan load on the electronics unit is more
than 1 A.
time
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 1,850 rpm
cannot be maintained.
If the cooling system is loaded too heavily
or the temperature is set too high,
the electronics can overheat.
Temperatur 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
Loose cables
Poor contact (corrosion)
Battery capacity too low
Cable cross section too small
Remedy
Establish a connection
Replace the main switch
Replace the supply line
fuse
Charge the battery
Establish a connection
Replacing the battery
Replace the cable
(fig. 7, page 6)
CRX
EN