Service Manual

57
Control Box
Contactor And Capacitor
Removal of the control box cover exposes the control
components. Both air conditioner and heat pump control
boxes will appear to be nearly identical. There are two
contactors, two capacitors, a control board and a
compressor start assist. The contactors are identical to
those used in the standard single speed units. One controls
low capacity operation and the second controls high speed.
The capacitors also are similar to those used in standard
single speed units. You have a fan capacitor for the outdoor
fan motor, and a run capacitor for the compressor motor.
The control board, start capacitor, and start relay control the
starting of the compressor. Always replace these devices
with the Factory Approved Components.
Incoming
Power
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The outdoor unit must always be grounded through the
ground lug to the unit disconnect and from the
disconnect to the electrical fuse box.
!
WARNING
NOTE: ECM motors are not connected to a capacitor.
Incoming power is attached to the two power wire stripped
leads. A ground lug is also provided.
S First check that the model plug is correct for the
unit model and size, and that it is installed properly.
START CAPACITOR
MOUNTING HOLES
START RELAY
MOUNTING HOLE
TAB ON BOTTOM OF
START RELAY TO BE
PLACED IN THIS CORNER
A10157
Fig. 41 – Start Relay and Capacitor Mounting Locations
Communicating in Cube Cabinet
A150063
A150064
Fig. 42 – 2- Stage Control Board