Operating instructions

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D. SINGLE BASEMENT HEAT PUMP
To verify circuits are being completed by the AC power
module board, you would first remove the electric box cover
and locate the AC power module board.
Using a 115 volt incandescent bulb, check from AC white
(common) of incoming 115V AC; one lead from incandescent
bulb and the other lead from incandescent bulb to the termi-
nals listed below to determine if a particular circuit is com-
pleted through the board. If the circuit is completed, the light
will illuminate.
NO on compressor relay is black wire and is compressor
circuit.
Terminal T1 is black wire and is High Fan circuit
Terminal T2 is black wire and is Reversing Valve circuit.
This circuit is energized in cooling mode and NOT energized
in the Heat Pump mode.
Terminal T3 is red wire and is Low Fan circuit.
NOTE: DO NOT use a voltmeter to do these checks as it
will give erroneous readings.
If the circuit is completed and that component is not operating,
the problem is in the wiring to the component or the compo-
nent.
E. DUAL BASEMENT AIR CONDITIONER AND
HEAT PUMP
To verify circuits are being completed by the AC power module
board you would first disconnect the two 9-pin connectors that
connect the electric kit to the unit.
Using a 115V incandescent bulb check from terminal 4, white
wire (115V common) to the other terminals to determine if a
particular circuit is completed through the board. If the circuit
is completed, the light will illuminate.