: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
37
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.
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.
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. Install unit where drifting sand cannot pile up against coil.
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
1. Remove side panel. (See Remove Side Panel in Cabinet section of
this manual.)
2. 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.
3. If oil deposits are present, spray coil with ordinary household
detergent. Wait 10 minutes, and proceed to next step.
4. 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.
5. Reinstall side panel.
6. Reconnect electrical power and check for proper operation.
Cleaning Outdoor Fan Motor and Blade
1. Remove grille, 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 grille and check for alignment.
5. Reinstall grille and position blade.
6. Reconnect electrical power and check for proper operation.
Electrical Controls and Wiring
1. Disconnect power to unit.
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 unit 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.
Final Check-Out
After the unit has been operating, the following items should be checked.
1. Check that unit operational noise is not excessive due to vibration
of component, tubing, panels, etc. If present, isolate problem and
correct.
2. Check to be sure caps are installed on high flow valves and are
tight.
3. Check to be sure tools, loose parts, and debris are removed from
unit.
4. Check to be sure all panels and screws are in place and tight.
CAUTION
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in equipment damage 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. Lock out and tag switch with suitable warning label.
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.
CAUTION
!
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.
