Filter
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21
NOTE: Unit will remain in defrost until defrost thermostat
reopens at approximately 65_F(18_C) coil temperature at liqui d
line or remainder of defrost cycle time.
MAINTENANCE
To ensure continuing high performance, and to minimize the
possibility of premature equipment f ailure, periodic maintenance
must be performed on this equipment. This heat pump unit should
be inspected at least once each year by a qualified service person.
To troubleshoot unit, refer to Table 9.
NOTE: TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury
or death and unit component damage.
The ability to properly perform maintenance on th is
equi pment requi res certain expertise, mechanical skills, tool s
and equipment. If you do not possess these, do not attemptto
perform any maintenance onthis equipment,otherthan those
procedures recommended in the Owner’s Manual.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow these warnings could result in personal
injury or death:
1. Turn off electrical power to the unit and install a lockout
tag before performing any maintenance or service on this
unit.
2. Use extreme caution when removing panels and parts.
3. Never place anything combustible either on or in contact
with the unit.
!
WARNING
UNIT OPERATION HAZARD
Failure to follow th is caution may result in improper
operation.
Errors made when reconnecting wires may cause improper
and dangerous operation. Label all wires prior to
disconnecting when servicing.
CAUTION
!
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each mont h. Clean or repl ace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Cl ean when necessary.
3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.
4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.
Step 1 — Air Filter
IMPORTANT: Never operate the unit without a suitable air filter
in the retur n--air duct system. Always replace the filter with the
same di mensional size and type as originally installed. See Table 1
for recom mended filter s izes.
Inspect air filter(s) at least onc e each month and replace
(throwaway--type) or clean (cleanable--type) at least twice during
each cooling season and twice dur ing the heating season, or
whenever the filter becomes clogged with dust and lint.
Indoor Blower and Motor
NOTE: All mo tors are pre--lubricated. Do not attempt t o lubricate
these motors.
NOTE: 460 volt units have a stepdown autotransformer that
supplies approximately 230 volts to a nominal 230 volt indoor
blower motor.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blo wer wheel and
motor annually.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Disconnect and install lockout tag on electrical power to the
unit before cleaning the blower motor and wheel.
!
WARNING
To clean the blower motor and wheel:
1. Remove and disassemble blower assembly as follows:
a. Remove blower access panel (see Fig 22).
b. Disconnect 5 pin plug and 4 pin plug from indoor
blower motor. Remove capacitor if required.
c. On all units remove blower assembly from unit.
Remove screws securing blower to bl ower partition and
slide assembly out. Be careful not to tear insulation in
blower compartm ent.
d. Ensure proper reassembly by marking blower wheel and
motor in relation to blower housing before disassembly.
e. Loosen setscrew(s) that secures wheel to motor shaft,
remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.
2. Remove and c lean blower wheel as follow s:
a. Ensure proper reassembly by marking wheel orientation.
b. Lift wheel from housing. When handling and/or
cleaning blower wheel, be sur e not to disturb balance
weights (clips) on blower wheel vanes.
c. Remove caked--on dirt from wheel and housing with a
brush. Remove lint and/or di rt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent.
d. Reassemble wheel into housing.
e. Reassemble motor into housing. Be sure setscrews are
tightened on motor shaft flats and not on round part of
shaft. Reinstall blower into unit. Reinstall capacitor.
f. Connect 5 pin plug and 4 p in plug to indoor blower
motor.
g. Reinstall blower access panel (see Fig. 21) .
3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during cooling
cycles.
607C-- --A