Mitsubishi Heavy Industries FDC100VNX User Manual

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314
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'12 • PAC-T-173
1.11.4 Operation control function by the outdoor controller
(
Ⅰ
) Models SRC40-60
(1) Defrosting operation
(a)
Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
1) After start of heating operation
When it elapsed 35 minutes. (Accumulated compressor operation time)
2) After end of defrosting operation
When it elapsed 35 minutes. (Accumulated compressor operation time)
3) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below
－
5ºC for 3 minutes continuously.
4) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature
 ¡
The outdoor air temperature
≧ －
2ºC : 7ºC or higher
 ¡
－
15ºC
≦
The outdoor air temperature
＜ －
2ºC : 4/15 × The outdoor air temperature + 7ºC or higher
 ¡
The outdoor air temperature
＜ －
15ºC :
－
5ºC or higher
5) During continuous compressor operation
In addition, when the speed command from the indoor controller of the indoor unit during heating operation has counted
0 rps 10 times or more and all conditions of a), b), c) and e) above and the outdoor air temperature is 3ºC or less are
satised (note that when the temperature for outdoor heat exchanger sensor (TH1) is
－
5ºC or less: 62 rps or more,
－
4ºC or less: less than 62 rps), defrost operation is started.
(b)
Ending conditions (Operation returns to the heating cycle when either one of the following is met.)
1) Outdoor heat exchanger sensor (TH1) temperature: 10ºC or higher
2) Continued operation time of defrosting → For more than 18 minutes.
Max. 18 minutes
Heating operation
¡Defrast operation
Depends on an operation condition, the time can be longer than 7 minutes.
2~7 minutes

Hot keep operation
-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

Mitsubishi Heavy Industries FDC100VNX Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDC100VNX
Category	Air Conditioner
Language	English