Service manual

39
REVERSING VALVE CHECKOUT
HEAT MODE
Note: Reversing Valve Is Energized In The Heat Mode And Is Subject To
Thermostat And P.C. Board Time Delays.
Note: If Compressor And Fan Motors Not Running, Refer To Proper Checkouts.
Once The Reversing Valve Has Energized, The P.C. Board Locks The Valve
Into An Energized Position Until The Wall Thermostat Is Put In The Cool
Position And Actually Has A Demand For Cooling, Sending 12 VDC Down Y1.