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III. 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.
IV. CLEAN INDOOR COIL
To clean the coil, remove indoor unit bottom panel and vac-
uum the coil fins, using care not to bend or damage fins.
V. CLEAN OUTDOOR COIL (OUTDOOR UNIT)
WARNING: Some metal parts and sharp fins of
outdoor unit coil can cause personal injury during
cleaning. Clean coil carefully.
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.
VI. 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.
A. 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
letting water drain into a 3-gallon bucket.
CAUTION: Do not use a screwdriver to pry drain
pan out of assembly — it could damage the pan.
4. Remove the 4 screws holding the drain pan.
5. Carefully hold the drain pan to remove it from the
assembly.
SERVICE
WARNING: When servicing unit, turn off all elec-
tric power to unit to avoid shock hazard or injury from
rotating parts.
CAUTION: Do not vent refrigerant to atmosphere
when servicing unit. Recover refrigerant during sys-
tem repair or unit removal.
I. 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.
Fig. 23 — Cleaning Filters
2. Press Mode button until OFF is displayed. Wait
5 minutes.
3. Press Mode button until either COOL or HEAT is
displayed (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.
A. 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
carefully. Before beginning, measure carefully and follow
acceptable building practices, NEC, and local codes.
I. VENTILATION-AIR ACCESSORY
Refer to ventilation air accessory installation instructions.
TROUBLESHOOTING
If the under-ceiling fan coil unit fails to start or operate prop-
erly, sometimes the problem is minor and can be handled
without a service call. Refer to Table 7 for some common
problems, causes, and typical solutions. See Fig. 20 and 21
for additional system troubleshooting details. If the problem
cannot be corrected, contact a local dealer for further
assistance.
—20—
a40-636
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Table of Contents
Troubleshooting
