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Cooling Mode
The normal operational sequence in cooling mode is as
follows:
•
R and YLO/G or Y/G thermostat contacts close, initiat-
ing a call for cool.
•
Integrated control module performs safety circuit
checks.
•
Outdoor fan and compressor are energized to their
appropriate speed.
•
Circulator blower is energized on the appropriate cool
speed following a fixed five second on delay. The
circulator blower requires 30 seconds to ramp up to full
speed. Electronic air cleaner terminals are energized
with circulator blower.
•
Furnace circulator blower and outdoor cooling unit run
their appropriate speed, integrated control module
monitors safety circuits continuously.
•
R and YLO/G or Y/G thermostat contacts open, com-
pleting the call for cool.
•
Outdoor fan and compressor are de-energized.
•
Circulator blower continues running for a fixed 45-
second cool off delay period. The speed run during
this period depends on the last cooling call from the
thermostat. If the call was for low cool, the blower will
operate at 88% of low cool speed. If call was for high
cool, blower operate at 88% of high cool speed.
• Electronic air cleaner terminals and circulator blower
are de-energized.
•
Furnace awaits next call from thermostat.
Normal Sequence of Operation
Fan Only Mode
The normal operational sequence in fan only mode is as
follows:
•
R and G thermostat contacts close, initiating a call for
fan.
•
Integrated control module performs safety circuit
checks.
•
Circulator blower is energized on continuous fan speed
(56% of high stage cooling) following a five (5) second
delay. Electronic air cleaner terminals are energized.
•
Circulator blower runs, integrated control module moni-
tors safety circuits continuously.
•
R and G thermostat contacts open, completing the call
for fan.
•
Circulator blower is de-energized. Electronic air cleaner
terminals are de-energized.
•
Furnace awaits next call from thermostat.
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Troubleshooting
