Operation Flow-Chart - Mitsubishi Electric PKH18FK1 Technical & Service Manual

9

OPERATION FLOW-CHART

MAIN OPERATION
1
YES
NO
1 In addition, the centralized and remote control can be operated.
2 The modes which indicate the sources of trouble are listed below.
l EO=Signal transmitting/receiving error
l P1=Room temperature thermistor malfunction
l P2=Indoor coil thermistor malfunction
l P4=Drain sensor malfunction
l P5=Drain over flow
l P6=Coil frost/overheat protection
l P7=System error
l P8=Outdoor unit trouble
3 The CHECK switch will show if an error has occurred in the past.
4 Fan runs on low speed for 1 minute in order to remove overheat air.
5 The 3-minute (6 minutes ... heating mode) time-delay functions after compressor stops.
6 FAN or AUTO mode is selected by the indoor dip switch setting.
7 In FAN mode, fan speed and vane operation depend on the remote controller setting. (Compressor is OFF.)
START
NO
Power circuit
breaker
YES
Check SW
ON twice
NO
w 1
YES
Operation SW
ON
NO
YES
"OFF" timer
NO
Set time
"ON" timer
complete
YES
YES
YES
Set time
complete
NO
STOP
PROTECTION DEVICE
SELF HOLD RELEASE
Remote controller
indicator lamp OFF
Indoor side
w 4
Fan STOP
Auxiliary heater OFF
Outdoor side
w 5
Compressor OFF
Fan STOP
Four-way valve OFF
OC193-25
NO
w 2
NO
Trouble
Remote controller
YES
operation display
Trouble STOP
Operating mode
(COOL)
NO
PROTECTION DEVICE
SELF HOLD
Operating mode
w 3
(DRY)
Remote controller
trouble display NO
Operating mode
(HEAT)
NO
w 6
Operating mode
(FAN)
NO
Auto COOL/HEAT
operation
YES
COOL operation
YES
DRY operation
YES
HEAT operation
YES
w 7
FAN operation