Service manual

23
MICROPROCESSOR CONTROL9
MITSUBISHI ELECTRIC
12
11
10
9
8
7
6
5
4
3
2
1
29
28
27
26
25
24
23
22
21
20
19
18
TIMER TEMP
TIMER/TEMP.
UP
DOWN
POWER
COOL
ON/OFF
LOUVER
MODE
SELECT
FAN
SPEED
TIMER
MODE
DRY
FAN
HIGH
LOW
ON
AUTO
STOP
START
1.OUTLINE OF MICROPROCESSOR CONTROL
● OFF-ON switching.
● COOL/DRY-FAN selector switching.
● Thermostat setting.
● HIGH-LOW fan speed switching.
● Swing louvers SWING-FIXED switching.
● TIMER mode selector switching.
● Timer setting.
● Self diagnostic troubleshooting.
● Test run switching.
● Room temperature thermistor.
● Indoor coil thermistor.
● Compressor protection device working
● Compressor motor and outdoor fan motor :
ON - OFF
● Fan : ON - OFF.
● Fan speed : HIGH - LOW
● Swing louver : ON-OFF
● Emergency stop.
OUTPUT to indoor unit
INPUT from indoor unit
INPUT to remote controller
● Transmits and receives orders.
REMOTE CONTROLLER
OUTPUT to remote controller
INDOOR CONTROLLER BOARD
● Receives orders from remote controller and temperature data from
indoor unit.
● Processes orders and data.
● Transmits the power of indication LED to remote controller
● Controls indoor and outdoor operation.
● Self diagnostic function.
w System control operation.<Optional>
w Emergency operation.
12VDC
12VDC
Polar, twelve (12) - core cable
Maximum length 50m (164ft)
Non - polar, two (2) - core cable
Outdoor unit
● Indication LED lights.
Indoor unit
OUTPUT to outdoor unit
INPUT from outdoor unit
OUTDOOR UNIT
● Receives order from indoor
controller.
● Emergency stop.