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COMPONENTS TESTING (CON’T)
Testing the Relay Board
LN
L1
Fuse
T 3.15AH 250 Volts AC
Indoor Coil
Thermistor
Test for 3.3VDC. If incorrect or
no voltage, replace electronic
relay board. If voltage OK,
check thermistor’s resistance
value (See page 56).
Outdoor Coil
Thermistor
Test here for 5VDC. If no
voltage or wrong voltage,
replace relay board.
Heat Relay
For Heat & Cool Units
Goes Here
Fan
High Speed
Fan
Med Speed
Fan
Low Speed
+
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