Bedienungsanleitung Webasto Cool Top Trail 28V (Seite 18 von 154) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch, Schwedisch)

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7 | Troubleshooting

18 / 154 9044617A_OI-II_Cool Top Trail 28V

7 Troubleshooting

Symptom Action

No air distrib-

utor display

when the unit

is turned ON.

Check if:

lPower is supplied to the vehicle and circuit

breakers are on.

lThe remote control battery is OK.

lThe remote control is off.

lThe voltage is too low.

lThe amperage of the circuit breaker in the

external power supply is too low.

Cooling not

available.

Check that the cooling mode is selected and

the air distributor display shows:

Use the remote control to set required temper-

ature below the current room temperature.

The compressor will delay a re-start for 3

minutes.

Heating not

available.

Check that heating mode is selected and the

air distributor display shows:

Use the remote control to set required temper-

ature above the current room temperature.

More time would be needed for starting heat-

ing under extremely cold condition.

When the unit is in heating mode and the out-

side temperature is very low the unit may auto-

matically enter defrost mode. The heating will

temporarily stop as the unit warms the outside

heat exchanger to remove any frost & ice.

Heating will resume when the outside heat ex-

changer has been cleared. During defrost the

unit displays “dF”.

Poor cooling

capacity.

Make sure the filter is clean.

Increase the fan speed to high to obtain the

maximum capacity.

Make sure all the doors and windows as well

as the sunroof are closed.

Use curtains and awnings to decrease the heat

load.

Check that the air openings of outdoor unit are

not soiled or blocked.

Water dripping

out of the air

distributor.

Unblock condensate outlets of outdoor unit.

Check the adaptor frame seal.

Park the vehicle in a more horizontal position,

with an angle < 5° (8,8%).

Increase the fan speed to high if condensate

forms on the outside of the air distributor.

Fault codes on the panel:

- If there is “0” or a jumbled display while on

generator supply this may indicate unstable

voltage and current.

E0 Communication fault.

E1 Room temperature sensor fault.

E2 Indoor heat exchanger temperature sensor

fault.

E3 Outdoor heat exchanger temperature sensor

fault.

E4 No cooling effect. Possible root causes are:

Symptom Action

lInsufficient refrigerant amount due to pip-

ing fracture.

lCompressor fault.

lSensor failure.

E5 Outdoor heat exchanger temperature too

high / Temperature anomaly.

Temperature anomaly: outdoor heat exchanger

temperature too high when cooling or too low

when heating. (When cooling, the display of

E5 indicates the outdoor temperature exceeds

64°C. It is likely due to the reduction of air

flow of the condenser, poor working of the

condenser fan or sensor failure; when heating,

if the outdoor temperature is higher than

18°C, the external air fan may be on and off

repeatedly. The occurrence of this is not a

fault, but self-protection of the system to avoid

overheating of the unit.)

A1 Outdoor ambient temperature sensor fault

LC Motherboard and drive board communication

fault

A4 Compressor discharge temperature sensor fault

C4 Compressor discharge over-temperature pro-

tection

b1 Module protection

b2 Module hardware protection

b3 Module software protection

b5 Compressor over-current protection

b6 Overvoltage and undervoltage protection

b9 Module heat sink temperature shutdown pro-

tection

bA Compressor stall protection

dF Not a fault: When operating on heating mode

in low ambient temperatures the unit will peri-

odically defrost the outside heat exchanger.

The air distributor display shows “dF” during

defrost operation and then returns to heating

once the defrost is completed.

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