Heating Operation - Mitsubishi Electric PKH18FK Technical & Service Manual

HEATING OPERATION

Heat operation
w 15
NO
Intial
HEATING
YES
Vane intial setting
Vane setting notch
NO
Defrosting
NO
Four-way valve ON
Hor adjust
in process
NO
Compressor ON
NO
Compressor
w 9
thermostat ON
Allowance cancel
2
NO
Indoor piping
-5¡F or lower
YES
Outdoor unit
trouble
FAN SPEED
Very low airflow
Compressor OFF
1
Auto COOL/HEAT
operation
w 16
NO
Initial mode
YES
w 17
> =
T T0
1
YES
COOL mode
COOL mode
NO
T < (T0 - 2)
1
YES
After 15min.
T <(T0-2)
1
NO
COOL operation
w15 (!) Until Low airflow is set while hot adjustment
(@) While defrosting (FAN STOP)
(#) When thermostat is OFF
In the case of(!), (@) and (#) 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
28
YES
YES
YES
10-minute
NO
compressor
YES
operation
YES
3 min.restart
prevention Allowance cancel
YES
6 min. restart
w 11
prevention
YES
Heating
NO
area
Hot adjust start
FAN STOP
w 11
FAN SPEED very low
YES
Ariflow area
20 min.elaspe
Compressor ON
w 10
YES
Airflow area
Heating area
NO
w 11
NO
Airflow area
Cooling area
YES
Defrost operation
START
Four-way valve
OFF
NO
HEAT mode
NO
NO
T >(T0 + 2)
1
YES
YES After 15min.
T >(T0 + 2)
1
NO
HEAT operation HEAT operation
1
w 11
YES
Heating area
NO
Defrost release
NO
Defrost
30 min. elaspe
2
YES
Outdoor unit trouble
1
B
YES
Indoor piping
131¡F or lower
NO
A
NO
Auxiliary heater NO
ON
YES
NO
Indoor piping
140¡F or higher
YES
Auxiliary heater OFF
Outdoor unit
Overheat remote
trouble
START
NO
Indoor unit
158¡F or higher
YES
NO
Allowance
period
YES
Overload protect
1
YES
Cool mode
set
1
A
PKH-FK
Type
3-minute
Auxiliary heater
OFF
Indoor coil
thermstor is 60¡C
or higher
FAN speed
Low notti
Airflow 10% up
YES
Indoor piping
B
95¡F 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 notch
Auxiliary heater ON
Hot adjust
release
6-minute restart
prevention
Allowance set
Compressor OFF
NO
NO
NO
NO
YES
FAN setting notch