Mitsubishi Electric Mr.SLIM PEH Series Technical & Service Manual page 23

HEATING OPERATION
Heat operation
YES
Defrpsting
NO
Four-way valve ON
YES
Hor adjust
in process
NO
YES
Compressor
ON
NO
Compressor YES
w9
thermostat ON
Allowance cancel
YES
2
NO
Indoor piping
-15°C or lower
YES
Outdoor unit
trouble
FAN SPEED
Very low airflow
Compressor OFF
1
AUTOMATIC COOLING/HEATING OPERATION
Auto COOL/HEAT
operation
w16
NO
Initial mode
YES
w17
NO
> =
T1 T0
YES
COOL mode
NO
COOL mode
YES
NO
T1 < (T0 - 3)
YES
YES
After 15min.
T1<(T0-2)
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
3 min.restart
Allowance cancel
prevention
6 min. restart
w11
prevention
YES
Heating
area
NO
NO
Hot adjust start
FAN STOP
w11
FAN SPEED
very low
YES
Airflow area
20 min.elaspe
Compressor ON
NO
w10
YES
Airflow area
Heating area
w11 NO
NO
Airflow area
Cooling area
YES
Defrost operation
START
Four-way valve
OFF
HEAT mode
NO
T1>(T0 + 2)
YES
After 15min.
T1>(T0 + 2)
NO
HEAT operation HEAT operation
1
w11
YES
Heating area
NO
Defrost release
NO
Defrost
30 min. elapse
2
YES
Outdoor unit trouble
1
FAN setting notch
YES
Indoor piping
55°C or lower
NO
NO
Auxiliary heater NO
ON
YES
NO
Indoor piping
60°C or higher
YES
Auxiliary heater
OFF
Outdoor unit
Overheat remote
trouble
START
NO
Indoor unit
70°C or higher
YES
NO
Allowance
period
YES
Overload protect
1
YES
Cool mode
set
1
YES
Indoor piping
35°C or higher
NO
NO
HOT adjust
6 min. elapse
YES
FAN SPEED
Low
NO
FAN SPEED
Low 2 min.
Auxiliary heater
elapse
thermostat ON
YES
YES
FAN SPEED
setting nitch
Auxiliary heater
ON
Hot adjust
release
6-minute restart
prevention
Allowance set
Compressor OFF
23