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l Remove the batteries from the remote control if the remote
control is not used for a long time to prevent damage to
the remote control from leaking batteries.
Fig. 55 Remote control batteries
See also chapter 6.15, "Resetting the remote control" on page
16.
All batteries and electronic devices are the sub-
ject to European Directive 2006/66 / EC or
2002/96 / EC and later must not be disposed of
with household waste. See also https://eur-
lex.europa.eu/advanced-search-form.html.
Every consumer is legally obliged to dispose of
batteries and electronic equipment only in
marked recycling bins at a waste collection
point. The return is free of charge.
See also: chapter 9, "Disposal" on page 18.
7.3
Bolt check
Check the four bolts holding the unit to the roof for tightness 3
months after first installation of the product.
Inspect the bolts regularly; minimally every 12 months.
Retighten to 8 Nm if necessary.
7.4
Regular usage
Webasto recommends that you operate the air conditioner reg-
ularly to ensure good performance. Minimally run the unit every
6 months for at least for 20 - 30 minutes.
7.5
Cleaning
Regularly remove leaves or other dirt from the ventilation grilles
of the outdoor unit.
l Regularly clean the unit using a soft, damp cloth and mild
detergent.
l Clean the vehicle roof at regular intervals. A dirty roof heats
up more than a clean roof.
CAUTION
u
Never drive through automatic car washes with a
roof air conditioner installed.
u
Do not spray into the openings of the unit with a
high-pressure cleaner.
u
Do not use hot cleaners and steam cleaners.
u
Do not use sharp or hard objects for cleaning.
u
Never use petrol, diesel, solvents or aggressive
cleaning agents.
7.6
Heat exchangers
Minimally have your unit's heat exchangers cleaned by a spe-
cialist workshop once per year.
9045225A_OI-II_Cool Top Trail 20G-24G ML
8
Troubleshooting
Symptom
Action
No air distrib-
Check if:
utor display
l Power is supplied to the vehicle and circuit
when the unit
breakers are on.
is turned ON.
l The remote control battery is OK.
l The remote control is off.
l The voltage is too low.
l The amperage of the circuit breaker in the
external power supply is too low.
Cooling not
Check that the cooling mode is selected and
available.
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
Check that heating mode is selected and the
available.
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
Make sure the filter is clean.
capacity.
Increase the fan speed to high to obtain the
maximum capacity.
Make sure all 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
Unblock condensate outlets of outdoor unit.
out of the air
Check the adaptor frame seal.
distributor.
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:
Troubleshooting | 8
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