Dometic COOLMATIC CRX 50 Instrucciones De Montaje Y De Uso página 26

Troubleshooting
Number of
Fault
flashes
4 Speed too low
5 Overheating of the
electronics unit
Constantly Temperature sensor
errors
Compressor does not run (battery connection)
Problem
U = 0 V
Term
≤ U
U
Term CON
Start attempt with
≤ U
U
Term OFF
Start attempt with
≥ U
U
Term ON
Electric circuit between
the pins in the compres-
sor interrupted
No input voltage for
controller and load
dump board
26
Possible cause
If the cooling system is overloaded, the mini-
mum speed of the motor of 1,850 rpm can-
not be maintained
If the cooling system is loaded too heavily or
the temperature is set too high, the electron-
ics can overheat
Temperature 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
Ambient temperature too high
Insufficient ventilation
Condenser is dirty
Defective compressor
Defective controller and load dump
board assembly
CRX50, CRX65
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. 0, page 8)
–
Move the refrigerator to
another location
Clean the condenser
Contact customer service
Replace complete control
module consisting of con-
troller and load dump
board
EN