Carrier 40QA024-060 - Manual (Page 20)

20
Clean Indoor Unit Bottom Panel — If the bottom panel
of the unit becomes dirty or smudged, wipe the outside of the
panel with a soft dry cloth. Use a mild liquid detergent and
wipe off carefully with a dry cloth.
Clean Indoor Coil — To clean the coil, remove indoor unit
bottom panel and vacuum the coil fins, using care not to bend
or damage fins.
Clean Outdoor Coil (Outdoor Unit)
To clean the outdoor coil:
1. Remove any dirt or obstruction from discharge
opening.
2. Use a garden hose to spray water on the coil. Debris
that collects between coil fins inhibits heat transfer —
direct the water spray between coil fins to flush out
debris.
Clean Condensate Drains — Clean all drains and drain
pans at the start of each cooling season. Check the flow by
pouring water into the drain.
CLEAN OR REPLACE DRAIN PAN
1. Place a plastic sheet on the floor to catch any water
that may spill from drain pan.
2. Remove the intake grille and distribution assembly
(attached).
3. Remove the condensate water in the drain pan by let-
ting water drain into a 3-gallon bucket.
4. Remove the 4 screws holding the drain pan.
5. Carefully hold the drain pan to remove it from the
assembly.
SERVICE
Before Calling for Service — Save the cost of a service
call by doing the following:
1. Be sure main power to system is turned on.
2. Press Mode button until OFF is displayed. Wait 5 min-
utes.
3. Press Mode button until either COOL or HEAT is dis-
played (as desired).
4. Adjust thermostat set point to desired room tempera-
ture. If system starts within a few minutes, service may
not be necessary. If system does not operate properly,
check Table 7 for typical solutions.
IF SYSTEM FAILS TO OPERATE — Be sure:
• unit ON/OFF switch is in ON position
• fuse or circuit breaker is not tripped
FRESH AIR INSTALLATION OPTION
The units have an installation option, which allows for field
installation of fresh air ventilation. Plan the installation careful-
ly. Before beginning, measure carefully and follow acceptable
building practices, NEC, and local codes.
Ventilation-Air Accessory — Refer to ventilation air
accessory installation instructions.
TROUBLESHOOTING
If the under-ceiling fan coil unit fails to start or operate
properly, sometimes the problem is minor and can be handled
without a service call. Refer to Table 7 for some common prob-
lems, causes, and typical solutions. See Fig. 20 and 21 for addi-
tional system troubleshooting details. If the problem cannot be
corrected, contact a local dealer for further assistance.
Some metal parts and sharp fins of outdoor unit coil can
cause personal injury during cleaning. Clean coil carefully.
Do not use a screwdriver to pry drain pan out of assembly
— it could damage the pan.
When servicing unit, turn off all electric power to unit to
avoid shock hazard or injury from rotating parts.
Do not vent refrigerant to atmosphere when servicing unit.
Recover refrigerant during system repair or unit removal.
Fig. 23 — Cleaning Filters