COMPONENTS TESTING (CON’T)
Testing the Relay Board
|
| Heat Relay |
| Fuse | For Heat & Cool Units |
L1 | T 3.15AH 250 Volts AC | Goes Here |
LN 
Fan
High Speed
Fan
Med Speed
Fan
Low Speed
Indoor Coil | Outdoor Coil |
Thermistor | 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).
+-
Test here for 5VDC. If no voltage or wrong voltage, replace relay board.
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