20
920-087-02 (9-03)
J. Routine Maintenance
1. Clean the unit air intake lter at least every 300 to 350 hours
of operation. Clean the lters with a mild detergent in warm
water and allow to dry thoroughly before reinstalling.
2. The indoor coil (evaporator coil), the outdoor coil (condenser
coil) and base pan should be inspected periodically (yearly
or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper,
etc.). Clean the coils and base pan with a soft brush and
NOTE: Units are to be inspected and serviced by qualied service personnel only.
Before reinstalling the chassis in the sleeve, inspect the
indoor blower housing, blower wheel, condenser fan blade,
and condenser shroud periodically (yearly or bi-yearly) and
clean of all debris (lint, dirt, mold, fungus, etc.) Clean the
blower housing area and blower wheel with an antibacterial /
antifungal cleaner. Use a biodegradable cleaning agent and
degreaser on condenser fan and condenser shroud. Use
warm or cold water when rinsing these items. Allow all items
to dry thoroughly before reinstalling them.
3. Periodically (at least yearly or bi-yearly): inspect all control
components, both electrical and mechanical, as well as the
power supply. Use proper testing instruments (voltmeter,
ohmmeter, ammeter, wattmeter, etc.) to perform electrical
tests. Use an air conditioning or refrigeration thermometer to
check room, outdoor and coil operating temperatures. Use a
sling psychrometer to measure wet bulb temperatures indoors
and outdoors.
NOTE: Do not use a caustic coil cleaning agent on coils or base pan. Use a biodegradable cleaning agent and degreaser.
Discharge Air Grille
Filters
Return Air
Grille
Front Cover
Evaporator Coil
Indoor Blower
Housing
Gasket
Condenser Shroud
Condenser Fan Blade
Indoor Blower
Innerwall
Basepan
Outdoor Grille
Wall Sleeve
Control Panel
Condenser Gasket
Compressor
compressed air or vacuum. If using a pressure washer, be
careful not to bend the aluminium n pack. Use a sweeping
up and down motion in the direction of the vertical aluminum
n pack when pressure cleaning coils. Cover all electrical
components to protect them from water or spray. Allow the unit
to dry thoroughly, inspect all gasket material for deterioration
(replace as necessary), and then reinstall the chassis in the
sleeve.
4. Inspect the surrounding area (inside and outside) to ensure
that the units' clearances have not been compromised or
altered.
5. Inspect the sleeve and drain system periodically (at least yearly
or bi-yearly) and clean of all obstructions and debris. Clean
both areas with an antibacterial and antifungal cleaner. Rinse
both items thoroughly with water and ensure that the drain
outlets are operating correctly. Check the sealant around the
sleeve and reseal areas as needed.
6. Clean the front cover when needed. Use a mild detergent.
Wash and rinse with warm water. Allow them to dry thoroughly
before reinstalling them in the chassis.
