Fujitsu AS G07LLCC Series Service Manual page 18

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 - 20°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 Continuous 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
4-way valve : OFF
Compressor speed : 90rps
01-14
Compressor
Compressor
integrating
integrating
operation:
operation:
Over 210 min. &
Over 213 min.
Stopped
Outdoor Outdoor
heat exchanger heat exchanger
temperature: temperature:
Below - 5°C Below - 2°C