RVP 6536 SERIES, Service Manual

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3. Cooling Fan Switch - The fan switch has four
positions from which to control the operation of the
cooling blower. The fan switch controls operation of
the cooling blower only after the system switch is
placed into the COOL position. With the system
switch in any other position, the fan switch will have
no effect on the operation of the cooling blower. Fan
switch positions and their resulting function are
listed below:
HIGH AUTO - When in the high automatic position,
the cooling blower operates at high speed and cycles
off and on with the 1
st
stage compressor. 2
nd
stage
cooling will cycle on and off as needed having no
effect on cooling blower operation.
LOW AUTO - When in the low automatic position,
the cooling blower operates at low speed and cycles
off and on with the 1
st
stage compressor. 2
nd
stage
cooling will cycle on and off as needed having no
effect on cooling blower operation.
LOW ON - When in the low on position, the cooling
blower operates continuously at low speed. Stage 1
and Stage 2 compressors cycle on and off as needed.
HIGH ON - When in the high on position, the
cooling blower operates continuously at high speed.
Stage 1 and Stage 2 compressors cycle on and off as
needed.
During heat pump operation, the blower operates at
high speed with heat demand.
B. TESTING
Place the thermostat system switch into the “OFF” position.
Once all safety precautions have been met, reinstate power to
all systems; thermostat, cooling and heating.
OFF
Starting with the system switch in the OFF position, the
display will be blank and no part of either the cooling or
heating systems will be operating.
FAN
Move the system switch to FAN. The display indicates room
temperature. The cooling system fan operates continuously at
high speed. No other components or systems are operating.
HEATING
Move the system switch to HEAT. The display will indicate
room temperature. Adjust the setpoint of the thermostat
above the room temperature displayed. After 15 to 30
seconds, the heat circuit of the thermostat will activate the
heating controls. Once the heat has turned on and is running,
adjust the setpoint below the room temperature displayed.
After 15 to 30 seconds, the heat circuit of the thermostat will
turn off and deactivate the heating controls. In heat pump
operation, indoor fan operates on only high speed .
COOLING
Move the system switch to COOL. The display will indicate
room temperature. Adjust the setpoint above room
temperature. Move the fan switch to LOW ON. The fan
operates continuously at low speed.
Move the fan switch to HIGH ON. The fan operates
continuously at high speed. Move the fan switch to LOW
AUTO, the fan will stop. Move the fan switch to HIGH
AUTO, the fan will remain off.
Adjust the setpoint 5
E
below room temperature (if the
thermostat has been powered for more than 3 minutes, 1
st
stage cooling and the cooling fan will come on approximately
1 minute later). If the thermostat has not been powered for
more than 3 minutes, 1
st
stage cooling and the cooling fan
will come on anywhere from 30 seconds to 3 minutes later.
2
nd
stage cooling will come on approximately 30 seconds after
the 1
st
stage.
With the fan switch in HIGH AUTO, the fan will operate at
high speed and cycle with stage 1 compressor. Move the fan
switch to LOW AUTO. The fan will operate at low speed and
cycle with stage 1 compressor. Once both stages of cooling
and both fan speeds have been verified, adjust setpoint 1
degree below room temperature. After 15 to 30 seconds, 2
nd
stage cooling will turn off while 1
st
stage remains on.