-
88
-
2) Outdoor fan tap control during heating
The outdoor fan tap is controlled in accordance with the outdoor heat exchanger temperature (sensed by Tho-R) and
the outdoor air temperature (sensed by Tho-A).
B-Zone
3
Outdoor air temperature (˚C)
5
A-Zone
B
UHi
Hi
A
Hi
Zone
C
D
D Zone
—3
Outdoor heat exchanger temperature (˚C)
0
C Zone
ON
OFF
3
5
Outdoor air temperature (˚C)
3) Outdoor fan tap control during heating high pressure control
a) If the compressor is started with an outdoor air temperature (sensed by Tho-A) of 12ºC or higher, the outdoor
unit’s fan motor is turned OFF for 4 minutes, then after 4 minutes of operation, control switches to outdoor fan
tap control in item 2).
b) If the outdoor air temperature (sensed by Tho-A) becomes 12 ºC or lower with the outdoor fan motor OFF,
operation continues for 4 minutes with the outdoor fan motor OFF.
(e)
Snow protection fan control
If SW5-2 on the outdoor unit PCB is turned ON, a full stop results. Then in the abnormal stop mode and with the thermostat OFF
unit’s outdoor fan outdoor temperature at 3ºC or lower, the fan is run for 10 seconds at 6th speed once every 10 minutes (Hi tap).
Note (1) Values in ( ) show for the 301~601 models.
(f)
Defrosting
1) Defrosting start conditions
Defrosting operation starts when all the follow-
ing conditions are satisfied.
a) If 45 minutes (35)
(1)
of cumulative compres-
sor operating time have passed since defrost-
ing ended and cumulative compressor operat-
ing time of 30 minutes have passed since heat-
ing operation started (Remote controller: ON)
b) If 5 minutes have passed since the compres-
sor went ON.
c) 5 minutes of outdoor fan operation have
passed.
d) After all the above conditions have been sat-
isfied, when the temperature at the outdoor
heat exchanger thermistor (Tho-R) and the
temperature at the outdoor air temperature
thermistor (Tho-A) is below the defrost op-
eration start temperature shown in the graph
at right.
Note (1) Values in ( ) show in the case of the 251 model.
In addition, in 301~601 models, the cumulative
compressor operating hours can be changed using
J7 (SW6-3) on the outdoor unit PCB. If J7 (SW6-
3) is open, cumulative time is changed to 37
minutes.
—5
—2
—10
—15
—14
—20
—20 —18
—15
—10
—5
0
5 6
10
Outdoor heat exchanger temperature (
˚C) [Tho-R]
Outdoor air temperature (˚C) [Tho-A]
—7
Defrosting operation start temperature SW5-1 ON
Defrosting operation start
temperature zone
Defrosting operation start temperature (Standard)
