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9
MICROPROCESSOR CONTROL
1.OUTLINE OF MICROPROCESSOR CONTROL
INPUT to remote controller
OFF-ON switching.
COOL/DRY-AUTO-HEAT selector switching.
Thermostat setting.
TIMER mode selector-switching and Timer
setting.
HIGH-LOW fan speed switching.
AUTO Vane selector (AIR DISCHARGE)
switching.
TEST RUN switching.
CHECK mode switching.
(Self diagnostic trouble shooting)
Indoor
unit
INPUT from indoor unit
Room temperature thermistor (RT1)
Pipe temperature thermistor (RT2)
OUTPUT to indoor unit
Auto vane's angle setting.
Booster heater ON-OFF Control.
Emergency stop.
Independent Control of
Outdoor Unit
Compressor protection
device working
Defrosting
START-STOP
Fan speed control.
Crankcase heater control
ON-OFF.
Self diagnostic function
Remote controller board
Processes and transmits
orders.
Indoor controller board
Receives orders from remote controller and tem-
perature data from indoor unit.
Processes orders and data.
Controls indoor and outdoor operation.
Self diagnostic function.
w System control operation.
w Emergency operation.
w Set by dip switch on indoor controller board.
1 2 3
Polar three-wire cable
Outdoor unit
1
2
3
24
OUTPUT to remote controller
Indication LCD lights.
TEST
CHECK
COOL
˚F
RUN
MODEL
˚C
DRY
SELECT
STOP
AMPM
AUTO
FAN
SWING
FAN
START AMPM
HEAT
NOT AVAILABLE
ON/OFF
TEMP
Compressor and
outdoor fan : ON-
OFF
Operation mode
change :COOL-
HEAT.
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