– 40 –
TEST CAPACITOR
RATED
VOLTAGE
COMPRESSOR
TERMINALS
START
RUN
S
C
R
COMMON
TEST KIT
GROUND
GROUND
TO UNIT
To access the control box components:
Remove the triangular metal bracket and
control board. (See steps 1 through 4 under
Control Board.
)
Remove the 2 Phillips-head screws that hold the
control box cover in place. Remove the control
box cover.
1.
2.
2. If the compressor starts, install a new run
capacitor which has a rating specifi ed for the
unit.
Main Power Connector
The main power connector receptacle receives line
voltage from the cord or direct connection kit and
supplies power to the power supply board.
Transformer
The transformer supplies 24 VAC to the control
board at location CN5 and 12 VAC to the power
supply board at location CN103. Check for line
voltage on the power supply board at CN103
between pins 5 and 7.
With power disconnected, check for winding
resistances at the following locations:
CN103 pin 5 to pin 7 is approximately 100
Ω
(230/208 VAC primary).
CN103 pin 1 to pin 2 is approximately 1.0
Ω
(12 VAC secondary).
CN5 pin 1 to pin 2 is approximately 3.0
Ω
(24 VAC secondary).
Wire Terminals
Most of the electrical components in the unit share
wire terminals that use a small clip that holds the
wire fi rmly to an electrical terminal. To remove
the wire from the terminal, depress the clip using
a small blade screwdriver and pull the wire off the
terminal as shown.
•
•
•
Tab
Control Box
1. Replace unit run capacitor with a known good
test capacitor which may be 10
µ
fd higher than
specifi ed and attempt to start the compressor.
ELECTRICAL TERMINAL
RELEASE/LOCKING TAB
Note:
When reinstalling the control box cover, place
the bottom tab of the cover in the slot of the control
box housing BEFORE securing screws.
Run Capacitor Check
WARNING:
The capacitor must be discharged.
Discharge the capacitor between the 2 connectors
using a pair of long-nose pliers with an insulated-
handle.
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