3. Defrost Flow Chart
The defrosting shall proceed by the integrating operation time, outdoor temperature
and outdoor heat exchanger temperature as follows.
1st defrost
Compressor
Compressor
integrating
integrating
operation:
operation:
Over 20 min.
Over 60 min.
Outdoor
Outdoor
heat exchanger
heat exchanger
temperature:
temperature:
Below - 9°C
Below - 5°C
Heating operation start : Compressor ON
2nd and later defrost
Compressor
integrating
operation:
Over 35 min.
Tn-Tn10 < - 5deg
Tn-Tnb < - 2deg
However, Tn <- 6°C
=
Defrost start
Defrost Indicator:
[Operation lamp]
7 sec ON / 2 sec OFF
Outdoor heat exchanger temperature:
Over +16°C
or
Compressor ON time: Maximum 15 minutes
Defrost end
01-17
(Not defrosted for 10 minutes)
(Constant monitoring)
Compressor
OFF count :
40 times
(Less than 10min.)
Compressor OFF
Outdoor fan motor OFF
50 sec later four - way valve OFF
55 sec later compressor ON
Base heater maintains the same status
as before the compressor stops.
Integrating defrost
Compressor
Compressor
integrating
integrating
operation:
operation:
Over 240 min.
Over 213 min.
Outdoor
Outdoor
heat exchanger
heat exchanger
temperature:
temperature:
Below - 3°C
Below - 5°C