Fujitsu AG G12LVCA Series Service Instruction page 19

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 - 5°C
or
Outdoor HEX temp.
Below - 30°C
Defrost start
Defrost Indicator:
[Operation lamp]
7 sec ON / 2 sec OFF
Outdoor HEX temp.: Over 16°C(09/12L), 10°C(14L)
Compressor ON time: Maximum 15 minutes
Defrost end
(Not defrosted for 10 minutes)
Integrating defrost
Intermittent operation
Compressor Compressor
OFF count : integrating
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 (09/ 12L)
or
01-16
Continuous operation
Compressor
integrating
operation:
Over 213 min.
Outdoor
heat exchanger
temperature:
Below - 5°C
70rps (14L)