Webasto BlueCool S Series Installation Instructions Manual - Bluecool S Series
BlueCool S Series
13 Faults
45
•
Heating mode:
Air supply insufficient
Measures:
Check air supply.
Difference between air inlet/air outlet temperature of
evaporator at least 4 K.
A09: Fault in cabin temperature sensor
Cabin temperature sensor defective, interruption in power
circuit/short circuit.
Cabin temperature sensor not connected.
Measures:
Connect cabin temperature sensor or replace.
A10: Fault in temperature sensor of evaporator
Temperature sensor of evaporator defective or power circuit
interruption/short circuit.
Measures:
Check electrical wiring or replace sensor.
INIT: Initialisation procedure or system blocked
Electrical wiring defective, interruption in power circuit/
short circuit.
Measures:
Check cables and connections of digital display controller.
Replace defective cable, digital display or PCB.
tA11: Evaporator temperature setpoint exceeded
Status code tA11 is a reference to the fact that the
evaporator temperature has become too low in the cooling
mode or too high in the heating mode. The compressor is
switched off and, as soon as the evaporator temperature
has normalised, is switched on again.
13.3 Faults not displayed on digital display
1. After switching on, the system does not react.
Check the power supply, the supply line circuit breakers,
fuses on the PCB, etc.
2. The compressor starts up, however no sea water exits
from the sea water outlet.
• Check whether the shut-off valves are opened.
• Check whether the sea water strainer is clogged.
• Check whether the sea water pump is running. If the
pump does not run with the compressor switched
on, check the power supply to the sea water pump.
3. The compressor and the sea water pump are running,
but neither the heating mode nor the cooling mode
function satisfactorily.
• Allow the fan to run in the automatic fan mode.
• Check the air ducts/the fan.
If the air flow is interrupted with the compressor
running, the evaporator can completely freeze,
causing the entire air flow to be blocked.
• If the sea water circuit runs too slowly in the heating
mode, the sea water can freeze in the condenser and
blocking and damaging the system.
• Check the voltage level. Do not operate the system
continually with insufficient voltage.
• Check the setting of the fan speeds of the
parameters b1 to b5.
Correct if necessary.
• if the performance of the system is still unsatisfactory
after checking all of the above points, you should
check the refrigerant filling.
4. The compressor does run, however it switches off
continually before the set setpoint temperature has
been reached. The high-pressure and low-pressure
switch switch off the compressor due to an excessively
high or excessively low working pressure.
Check the correct operation of the refrigerant circuit.
5. An incorrect room temperature is displayed.
Cabin temperature sensor positioned incorrectly, fault
sources are present or display values are falsified.
Check whether the cabin temperature sensor is subject
to direct fault sources, like direct sunlight or devices
radiating heat.
Calibrate sensor or replace defective sensor.
NOTE
This status code is a system information and not
a fault which must be eliminated. When the
temperature for switching on again is reached,
the status display automatically disappears.