NOTE: The roof air conditioner will not operate in Heat
Pump mode with ambient temperatures at or below 24º
Fahrenheit. If the heat pump mode is selected at or below 24°
Fahrenheit, or if operating in Heat Pump mode and tempera-
ture drops to 24º Fahrenheit, the air conditioner will stop Heat
Pump operation and Aux Heat will be displayed. The furnace
will be selected as the auxiliary heat source and will begin
operation. The furnace will remain the primary heat source
until ambient temperature rises above 42º Fahrenheit. When
ambient temperature is between 24-42º Fahrenheit, a defrost
cycle is initiated approximately every 40 minutes of compres-
sor operation. The blower motor will stop for five minutes and
Defrost will be displayed. After the defrost cycle the Heat
Pump operation will resume.
If the Aux Heat cycle is initiated and the motorhome is equipped with an
aqua hot. The aqua hot will need to be turned ON by using the switches locat-
ed in the galley. Living room and dinette heat exchanger blowers will automat-
ically begin operation. Use the bedroom comfort control to select Zone One or
Zone Two heat exchangers. The Aux Heat mode is automatically selected due
to refrigerant characteristics in cold temperatures.
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The roof air conditioner will operate only when the following needs have
been met:
• 120 Volts AC from either shore power or the generator is supplied.
• The battery cut-off switch is in the ON position and house batteries are
charged.
Thermostat Operation In Air Conditioner Mode:
The living room comfort control will operate the front roof air conditioner
functions.
• Depress the MODE button repeatedly until Cool is displayed.
• Set desired fan speed by depressing the FAN button.
• Set desired cooling temperature by depressing the UP or DOWN buttons.
The Bedroom comfort control will operate the rear roof air conditioner
functions and the center roof air conditioner for all 43 foot models.
• Depress the MODE button repeatedly until Cool is displayed.
• Depressing the FAN and MODE button simultaneously will alternate
between Zone One and Zone Two. Zone One will control the bedroom
roof air conditioner and Zone Two will control the center roof air conditioner.
• Set desired fan speed by depressing the FAN button.
• Set desired cooling temperature by depressing the UP or DOWN buttons.
NOTE: Compressor will engage two minutes after blower
motor activation. This prevents accidental compressor
activation against high pressure.
Appliance & Equipment
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EXECUTIVE 3•72
Operation
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