WAECO USA
• Page 7
SYMPTOM
RESULT CORRECTIVE
ACTION
Compressor does not work
UKL = 0 Volts
Interruption in connection line
Load battery
of the battery / electronics
Main switch is defective
Additional line fuse is blown
UKL < UON
Battery voltage is too low
Start attempt with UKL < UON
Loose cable connection / poor contact (corrosion)
Replace battery
Cable cross section too small
Battery capacity too low
Start attempt with UKL > UON
Ambient temperature is too high
Insufficient air inlet and outlet
Dirt build-up in condenser
Fan defective
Compressor does not operate
with electronics
Electronics defective
Replace electronics
Interruption in compressor’s
electronic system between
the pins
Compressor defective
Replace compressor
Interior temperature too low at thermostat setting 1
Compressor runs constantly
Thermostat sensor has no contact at evaporator
Thermostat line short-circuited
Secure thermostat
Thermostat defective
Replace thermostat
Compressor runs too long
Large quantity frozen in evaporator compartment
Compressor running time normal
Refrigerating chamber is too small
Shield evaporator from
refrigerating chamber
TROUBLESHOOTING
LEGEND
UKL . . . . Voltage between positive and negative terminal
of electronics
UON . . . Switch-on voltage at terminal of electronics
UOFF . . . Switch-off voltage at terminal of electronics
