10 Troubleshoong
Below are the possible causes of failure or malfuncon with an explanaon of
measures to be taken. In the event of defects not contained in the table or in the
event of faults that cannot be resolved following the contained instrucons, contact
Indel Webasto Marine S.r.l. directly.
Table 8: Fault-cause-measure summary table
Fault Possible cause Measure
Nothing happens when the
power is switched on.
Incorrect polarity.
No electrical current.
The baery is drained.
Voltage drop due to cables that
are too thin.
Thermostat fault
Electronic unit fault
Correctly posion + and - con-
necons.
Check that mains power is
connected.
Check fuses.
Inspect the charging circuit.
Check possible voltage drops.
Replace cables if necessary.
Connect to bridge C and T on the
electronic unit. If the compres-
sor starts up, the thermostat is
faulty.
Change the electronic unit.
The compressor only performs
brief start aempts at start-up.
Power problems, voltage too low
or voltage drop during start-up
aempts.
The Baeries are drained.
Check cables and connecons,
possible presence of verdigris.
Charge the baeries, start the
motor or connect the baery
charger.
The compressor funcons but
does not cool.
Loss of refrigerant.
Quick coupling joints not ght-
ened enough.
Hoses or evaporator leaking.
Insect and ghten. Contact an
expert in refrigeraon systems
for a general check or a specic
refrigerant check.
The compressor runs for a long
me but without generang
enough cold.
Inadequate venlaon and/
or insucient insulaon of the
compressor.
Improve venlaon and/or
isolaon of the cooling compart-
ment.
The compressor runs too long,
generang too much cold in the
cooling compartment.
The end of the thermostat
sensor is not mechanically con-
nected to the evaporator.
The thermostat has a fault for
which it does not turn o.
Check assembly of the sensor
end and replace it.
Re-posion the thermostat.
Fuses are blown.
Fuses are sized incorrectly.
Electronic unit fault
Check fuses 15 A – 12 V / 7.5
A – 24 V
Change the electronic unit.
User Manual
84