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'22 • PAC-SM-412
-
29
-
(ii) Heating
1) Operating conditions
When the outdoor air temperature (TH2) is 13ºC or higher continues for 30 seconds while the compressor speed is other th
an
0 rps
2) Detail of operation
After the outdoor fan operates at -3 speed for 60 seconds; the corresponding outdoor heat exchanger temperature shall impl
e-
ment the following controls.
a) Outdoor heat exchanger temperature
=
< 10
ºC
After the outdoor fan speed rises (up) to 1 speed for 60 seconds; if the outdoor heat exchanger temper-
ature is lower than 10
ºC
, gradually increase the outdoor fan speed by 1 speed.
b) 10
ºC
< Outdoor heat exchanger temperature
=
<
13ºC
After the outdoor fan speed maintains for 20 seconds; if the outdoor heat exchanger temperature is 10
ºC
-
13ºC
, maintain outdoor fan speed again.
c) Outdoor heat exchanger tempeature > 13
ºC
After the outdoor fan speed drops (down) to 1 speed for 60 seconds; if the outdoor heat exchanger temper-
ature is higher than 13
ºC
, gradually reduce outdoor fan speed by 1 speed. (Lower limit 2nd speed)
3) Reset conditions
When either of the following conditions is satisfied
a) The outdoor air temperature (TH2) is 11ºC or lower.
b) The compressor speed is 0 rps.
(f) Outdoor fan motor protection
If the outdoor fan motor has operated at 75 min
-1
or lower for more than 30 seconds, the compressor and fan motor are stopped.
(a) Starting conditions (Defrost operation can be started only when all of the following conditions are satisfied.)
(i) After start of heating operation
When it elapsed 35 minutes (Accumulated compressor operation time)
(ii) After end of defrost operation
When it elapsed 35 minutes (Accumulated compressor operation time)
(iii) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below
-
5ºC for 3 minutes continuously
(iv) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature (TH2-TH1)
●
The outdoor air temperature
≧
-
2ºC
: 7
ºC
or higher
●
-
15ºC
<
The outdoor air temperature
<
-
2ºC
: 4/15 × The outdoor air tempe 7
ºC
or higher
●
The outdoor air temperature
≦
-
15ºC
:
-
5ºC
or higher
-20
-20
-15
-10
-5
0
5
10
-15
-10
-5
0
Outdoor air temperature (
℃
)
Outdoor heat exchanger temperature (
℃
)
Defrost operation
start
Defrost operation start temperature
(v) During continuous compressor operation
In addition, when the speed command from the indoor control of the indoor unit during heating operation has
counted 0 rps 10 times or more and all conditions of (i), (ii) above and the outdoor air temperature is 3
ºC or less
and
the temperature for outdoor heat exchanger sensor (TH1) is
-
5ºC
or less: 62 rps or more,
-
4ºC
or less: less
than 62 rps are satisfied, defrost operation is started.
(4) Defrost operation