Mitsubishi PLH-3AK.UK Technical & Service Manual page 31

HEATING OPERATION
Heat operation
w 15
NO
initial
HEATING
YES
Vane setting notch Vane initial setting
NO
YES
defrosting
NO
Four-way valve ON
YES
Hot adjust
in process
NO
YES
Compressor ON
NO
YES
Compressor
w 9
thermostat ON
NO
Allowance cancel
YES
YES
NO
Indoor piping
-15°C or lower
2
YES
Outdoor unit
trouble
FAN SPEED
Extra low airflow
Compressor OFF
1
AUTOMATIC COOLING/HEATING OPERATION
Auto COOL/HEAT
operation
w 16
NO
Initial mode
YES
w 17
NO
T1 ] T0
YES
COOL mode
NO
COOL mode
YES
NO
T1 [ (To - 2)
YES
YES
After 15min.
T1 [ (To-2)
NO
COOL operation
w15 ( i )Until Low airflow is set while in hot adjustment
( ii )While defrosting (FAN STOP)
(iii)When thermostat is OFF
In the case of( i ), (ii) and (iii) above, airflow is horizontal regardless the VANE setting.
w16 When AUTO operation is started, COOL or HEAT mode is selected automatically.
w17 T1 : Room temperature.
To : Set temperature
10-minute
NO
compressor
operation
YES
Allowance cancel
3 min. restart
w 11
prevention
YES
Heating
NO area
NO
6 min. restart
prevention
FAN STOP
NO w 11
YES
Fan area
20 min. elaspe
NO
w 10
YES
Hot adjust start
Fan area
Heating area
FAN SPEED very low
NO
w 11
NO
Fan area
Cooling area
Compressor ON
YES
Defrost operation
START
Four-way valve
OFF
HEAT mode
NO
T1 ] (To + 2)
YES
After 15min.
T1 ] (To + 2)
NO
HEAT operation HEAT operation
1
w 11
YES
Heating area
NO
Defrost release
Defrost NO
30 min. elapse
2
YES
Outdoor unit trouble
1
B
YES
Indoor piping
55°C or lower
NO
NO
A Auxiliary heater
NO
ON
YES
NO
Indoor piping
60°C or higher
YES
Auxiliary heater OFF
Outdoor unit
Overheat remote
trouble
START
NO
Indoor piping
70°C or higher
YES
NO
Allowance
period
YES
Overload protect
1
YES
Cool mode
set
1
31
PLH-AKH
Type
3-minute
Auxiliary heater
OFF
Pipe
temperature
thermistor is 60°C
or higher
FAN speed
Low notch
Airflow 10% up
YES
Indoor piping
35°C or higher
NO
NO
HOT adjust
5 min. elapse
YES
FAN SPEED
Auxiliary heater
Low
thermostat ON
NO
YES
FAN SPEED
Low 2 min.
elapse
Auxiliary heater ON
YES
FAN SPEED
setting notch
Hot adjust
release
6-minute restart
prevention
Allowance set
Compressor OFF
A
NO
YES
NO
YES
NO
YES
NO
YES
FAN setting notch
B