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Electrical Maintenance
123
Condenser Fan and Evaporator
Fan Rotation
NOTE: If both the condenser fan and
evaporator fans are rotating backwards,
diagnose the automatic phase selection system.
Check Condenser Fan Rotation
Check for proper condenser fan rotation by
placing a small cloth or sheet of paper against the
condenser fan grille on the front of the unit.
Proper rotation will blow the cloth or paper away
from the grille. Improper rotation will hold the
cloth or paper against the grille.
If the condenser fan is rotating backwards, see the
unit wiring diagram to correct fan motor wiring at
the fan motor junction box or condenser fan
contactor. To correct improper fan rotation,
reverse any two fan power cord leads at the
condenser fan contactor (disconnect power supply
before reversing leads). Do not move the CH
ground wire.
Check Evaporator Fan Rotation
Visually inspect the evaporator fan blades for
proper rotation. Arrows located on the underside
of the fan deck indicate the correct direction of
rotation.
Check both high and low speed evaporator fan
rotation by performing Evaporator High and
Evaporator Low tests from the Manual Function
Test menu.
If an evaporator fans rotate backwards on one or
both speeds, see the unit wiring diagram to correct
motor wiring at the fan motor junction box or
evaporator fan contactor (disconnect power
supply before reversing leads). (Do not move the
ground wire which is labeled CH.)
NOTE: Evaporator fan motor wires EF1, EF2
and EF3 are used on low speed fan operation.
Wires EF11, EF12 and EF13 are used on high
speed fan operation.
Summary of Contents for 098916
Page 5: ......
Page 11: ...Table of Contents 10...
Page 19: ...Service Guide 18...
Page 28: ...Specifications 27 Figure 2 Physical Specifications AMA313...
Page 41: ...Unit Description Features Options 40...
Page 105: ...Operating Instructions 104...
Page 155: ...Servicing The Unit 154...
Page 187: ...Index 186...
Page 189: ...Wiring and Schematic Diagrams Index 188...
Page 190: ...189 Wiring Schematic...
Page 191: ...190 Wiring Diagram Page 1 of 2...
Page 192: ...191 Wiring Diagram Page 2 of 2...