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3 The coil should be cleaned when it is dry. If the coil is
coated with dirt or lint, vacuum it with a soft brush
attachment. Be careful not to bend the coil fins.
4 If the coil is coated with oil or grease, clean it with a mild
detergent-and-water solution. Rinse the coil thoroughly
with water.
IMPORTANT: Do not use excessive water
pressure. Excessive water pressure can bend the fins and
tubing of the coil and lead to inadequate unit performance.
Be careful not to splash water excessively into unit.
5 The venturi should also be inspected for items of
obstruction such as collections of grass, dirt or spider
webs. Remove any that are present.
6 Inspect the circulating air blower wheel and motor for
accumulation of lint, dirt or other obstruction and clean if
necessary. Inspect the blower motor mounts and the
blower housing for loose mounts or other damage. Repair
or replace if necessary.
Re-assembly
1 Place the condenser top panel back on the unit and replace
all screws.
2 Run the fan motor wires through the hole in the bottom of
the control box. Reconnect fan motor wires per the wiring
diagram attached to the back of the cover.
3 Replace the filter and blower/evaporator coil access
panels.
4 Replace the control box cover and controls access panel.
5 Restore electrical power to the unit and check for proper
operation, especially the condenser fan motor.
IM 861
Replacement Parts
To find your local McQuay Certified Parts Distributor, go to
www.mcquay.com and select Parts Locator.
Troubleshooting
Refer to Figures 19 and 20 for determining cause of unit
problems.
Wiring Diagrams
Figures 21 and 22 are complete wiring diagrams for the unit
and its power sources. Also located on back of compressor
access panel.
Charging
See Figures 23 and 24 for proper charging information.
19
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