Service Manual

61
CARE AND MAINTENANCE
To assure high performance and minimize possible
equipment malfunction, it is essential that maintenance be
performed periodically on this equipment. The frequency
with which maintenance is performed is dependent on such
factors as hours of operation, geographic location, and local
environmental conditions.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect all electrical power to unit before performing
any maintenance or service on outdoor unit. Remember
to disconnect power supply to air handler as this unit
supplies low- voltage power to the outdoor unit.
!
WARNING
The minimum maintenance that should be performed on this
equipment is as follows:
1. Check outdoor coil for cleanliness each heating and
cooling season and clean as necessary.
2. Check fan motor and blade for cleanliness each
month during cooling season and clean as necessary.
3. Check electrical connections for tightness and
controls for proper operation each cooling season
and service as necessary.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Because of possible damage to the equipment or
personal injury, maintenance should be performed by
qualified personnel only.
Desert and Seacoast Locations
Special consideration must be given to installation and
maintenance of condensing units installed in coastal or
desert locations. This is because salt and alkali content of
sand adheres to aluminum fins of coil and can cause
premature coil failure due to corrosion.
Preventive measures can be taken during installations, such
as:
1. Locate unit on side of structure opposite prevailing
winds.
2. Elevate unit to height where drifting sand cannot pile
up against coil. Mounting feet, 4 in. high, are available
as accessories and can be used to elevate unit.
3. Addition of coastal filter (See Product Specifications
accessory listing).
Maintenance in desert and seacoast
locations:
1. Frequent inspection of coil and basepan especially
after storms and/or high winds.
2. Clean coil by flushing out sand from between coil fins
and out of basepan as frequently as inspection
determines necessary.
3. In off season, cover with covering that allows air to
circulate through but prevents sand from sifting in
(such as canvas material). Do not use plastic as
plastic will hold moisture possibly causing corrosion.
Cleaning Coil
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Coil fin damage can result in higher operating costs or
compressor damage. Do not use flame, high- pressure
water, steam, volatile or corrosive cleaners on fins or
tubing.
CAUTION
!
1. Clean coil using vacuum cleaner and its crevice tool.
Move crevice tool vertically, close to area being
cleaned, making sure tool touches only dirt on fins
and not fins. to prevent fin damage, do not scrub fins
with tool or move tool horizontally against fins.
2. If oil deposits are present, spray coil with ordinary
household detergent. Wait 10 minutes, and proceed
to next step.
3. Using garden hose, spray coil vertically downward
with constant stream of water at moderate pressure.
Keep nozzle at a 15- to 20_ angle, about 3 in. from
coil face and 18 in. from tube. Spray so debris is
washed out of coil and basepan.
4. Reinstall top cover and position blade.
5. Reconnect electrical power and check for proper
operation.
Cleaning Outdoor Fan Motor and Blade
1. Remove fan motor and blade. Be careful not to bend
or dent fan blade.
2. Clean motor and blade with soft brush or cloth. Be
careful not to disturb balance weights on fan blade.
3. Check fan blade setscrew for tightness.
4. Reinstall fan motor and blade to top cover and check
for alignment.
5. Reinstall top cover and position blade.
6. Reconnect electrical power and check for proper
operation.
Electrical Controls and Wiring
1. Disconnect power to both outdoor and indoor units.
2. Check all electrical connections for tightness. Tighten
all screws on electrical connections. If any
connections appear to be burned or smoky,
disassemble the connection, clean all parts and
stripped wires, and reassemble. Use a new connector
if old one is burned or corroded, and crimp tightly.
3. Reconnect electrical power to indoor and outdoor
units and observe unit through 1 complete operating
cycle.
4. If there are any discrepancies in operating cycle,
troubleshoot to find cause and correct.
Refrigerant Circuit
1. Check refrigerant charge using the superheat
method, and if low on charge, check unit for leaks
using an electronic leak detector.
2. If any leaks are found, remove and reclaim or isolate
charge (pumpdown) if applicable. Make necessary
repairs.
3. Evacuate, recharge, and observe unit through 1
complete operating cycle.