– 4 –
Thermistors ...................................................................................................................................26
  Thermistors ........................................................................................................................... 26
  Thermistors Indoor................................................................................................................26
  Thermistors Outdoor .............................................................................................................26
Controls ........................................................................................................................................27
  Main Board: Front Cover ......................................................................................................27
  Power Cords .........................................................................................................................28
  Main Board - Front ................................................................................................................ 29
  RJ-45 ....................................................................................................................................29
  Main Board ...........................................................................................................................30
  Component Checks at Main Board ....................................................................................... 31
Fault Codes ..................................................................................................................................32
Service Mode ...............................................................................................................................34
 Accessing Controls ...............................................................................................................35
  Low Voltage Transformer ...................................................................................................... 36
Service Main Board ......................................................................................................................37
User Interface ...............................................................................................................................39
Air System ....................................................................................................................................40
  Fan Motors ...........................................................................................................................40
  Indoor Fan Motor ..................................................................................................................40
  Indoor Blower Wheel ............................................................................................................40
  Indoor Fan Bearing ...............................................................................................................41
  Outdoor Fan Motor Shroud ................................................................................................... 42
  Outdoor Fan Motor ...............................................................................................................43
Electric Heat .................................................................................................................................44
  Heater ...................................................................................................................................44
Condensate Removal ...................................................................................................................46
  ICR System ..........................................................................................................................46
  ICR Pump .............................................................................................................................46
  Slinger on Outdoor Fan Blade ..............................................................................................46
  Damper Door ........................................................................................................................47
  Make-Up Air Module (MUAM) ............................................................................................... 47
(Continued next page)