Manual

AU
IBIS4 Troubleshooting
23
Not heating well The roof air conditioner is not set to
heating.
➤ Set the roof air conditioner to
heating.
The ambient temperature is below
–2 °C.
The roof air conditioner is
designed for best operation at
ambient temperatures above
–2 °C.
The temperature set is lower than the
room temperature.
➤ Select a higher temperature.
One of the temperature sensors is
defective.
➤ Contact an authorised service
agent or Dometic.
The evaporator fan is damaged.
The condenser fan is damaged.
Low air output The air intake grilles are blocked or
obstructed.
➤ Remove any leaves and other
dirt from the ventilation grilles
of the roof air conditioner.
The fan is defective. ➤ Contact an authorised service
agent or Dometic.
Water enters the
vehicle.
The condensation water drainage
openings are clogged up.
➤ Clean the drainage openings
for condensation water.
The seals are damaged. ➤ Contact an authorised service
agent or Dometic.
Roof air
conditioner does
not switch on.
No supply voltage (240 V AC)
connected.
➤ Check the power supply.
The voltage is too low (under
200 V AC).
➤ Contact an authorised service
agent or Dometic.
The voltage converter is defective.
One of the temperature sensors is
defective.
The electrical fuse of the power
supply is too low.
➤ Check the electrical fuse of
the power supply.
Roof air
conditioner does
not switch off.
One of the temperature sensors is
defective.
➤ Contact an authorised service
agent or Dometic.
The electrical fuse of the power
supply is too low.
➤ Check the electrical fuse of
the power supply.
Problem Cause Remedy
IBIS4--O.book Seite 23 Montag, 5. November 2018 7:56 19