Fujitsu AS*G09LTCB Service Instructions Manual page 22

3. Defrost Flow Chart
The defrosting shall proceed by the integrating operation time, outdoor temperature
and outdoor heat exchanger temperature as follows.
Normal defrost
O
utside air temp. > -10°C
=
Outdoor HEX temp.
Below - 17°C
Heating operation start : Compressor ON
Outside air temp. < -10°C
Outdoor HEX temp.
- Outside air temp.
Below - 7°C
or
Outdoor HEX temp.
Below - 25°C
Defrost start
Defrost Indicator:
[Operation lamp]
7 sec ON / 2 sec OFF
Outdoor HEX temp.: Over 16°C
or
Compressor ON time: Maximum 15 minutes
Defrost end
(Not defrosted for 10 minutes)
Integrating defrost
Intermittent operation
Compressor Compressor
integrating
OFF count :
40 times operation:
(Less than 10min.) Over 240 min.
Outdoor
heat exchanger
temperature:
Below - 3°C
Outdoor fan : OFF
Compressor speed : 0 rps
EEV : 480pulse
4-way valve : OFF
Compressor speed : 90rps (09L)
01-17
Continuous operation
Compressor
integrating
operation:
Over 213 min.
Outdoor
heat exchanger
temperature:
Below - 5°C
70rps (12L)
80rps (14L)