Microprocessor Control - Mitsubishi Electric PL18FK2 Service And Parts Manual

1. OUTLINE OF MICROPROCESSOR CONTROL
1
MICROPROCESSOR CONTROL
INPUT
u
Room temp. thermistor (TH 1, RTI
)
Indoor coil thermistor (TH2, RT2)
Drain sensor
Remote controller
LCD indicator
,-
OFF-ON switching.
COOL/DRY-FAN selector switching.
Thermostat setting.
OUTPUT to indoor unit
Remote controller
MICROPROCESSOR Board
orders.
Processing and transmitting the
F a n : ON-OFF
*TIMER mode selector-switching and Timer
setting.
HIGH-LOW fan speed switching.
A U T O Vane SWING-STOP switching.
*AUTO Vane selector (AIR DISCHARGE)
switching.
*TEST RUN switching.
CHECK mode switching.
b
(Self diagnostic trouble shooting)
Indoor Unit
MICROPROCESSOR Board
Receiving the orders from remote controller
and temperature data from indoor unit
Processing the command and data
Control of indoor and outdoor operation
S e l f diagnostic function
*
System control operation
*
Emergency operation
*Set
by
switching on indoor unit microprocessor board.
*Transmitting the power t o remote controller
mr.SLlm
POWER-
A-ELECTRK:
L
m
Fan speed : HIGH-LOW- (EXTRA LOW)
L
Autovane's angle setting
Drain pump : ON-OFF
Emergency all stop.
Polar Two-w~re cable
' 7
Non-polar. Two-wlre cable
Outdoor unit
Compressor
protection
dev~ce work~ng
F a n speed control
Crankcase heater control
ON-OFF
Self d~agnost~c funct~on
o
c\l
F
I
I
$
.
Max. Dlstance 550 yards
@ - ~ g n a ~