Operation; Maintenance; Cleaning The Air Filter; Cleaning The Return Air Grille - Dometic FreshJet 4 Series Installation Manual

Rooftop air conditioner (FreshJet return air grille, wall thermostat controls)
a. Disconnect the 120 VAC and 12 VDC power
supplies.
b. Verify all the wiring is correct and the correct DIP
switches are set to the On position.
c. Perform a system reset.

10 Operation

See the thermostat operating instructions for your model
to learn how to use the thermostat.

11 Maintenance

This section describes routine activities to maintain
properly-working system components.

11 .1 Cleaning the air filter

NOTICE: Never run the unit without the return air
filter in place. Otherwise, dirt will accumulate and may
substantially degrade the performance of the unit over
time.
This section describes how to maintain a clean air filter.
1. Periodically (or at a minimum of every two weeks of
operation) remove the return air filter located behind
the return air vent grille and wash it with soap and
warm water.
2. Let the return air filter dry completely before placing
the return air filter back into position.

11 .2 Cleaning the return air grille

NOTICE: Never use furniture polish or scouring
powders to clean the outside shell of the return air grille.
Clean the outside shell of the return air grille with a
soft cloth dampened with a water and mild detergent
solution.

11 .3 Servicing the blower

The blower motor in the rooftop component is factory-
lubricated and requires no service.
EN
Operation
23