Fujitsu AU G18LVLB Series Service Instruction page 23
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Service instruction (101 pages)
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4. 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 22 minutes
Over 62 minutes
Outdoor
Outdoor
heat exchanger
heat exchanger
temp.:
temp.:
Below - 5°C
Below - 9°C
Heating operation start : Compressor ON
2nd and later defrost
Compressor
integrating
operation:
Over 35 minutes
Outdoor
heat exchanger
temp.:
Below - 10°C
Defrost start
Defrost Indicator:
[Operation lamp]
6 sec ON / 2 sec OFF
Compressor : OFF
Outdoor fan motor : OFF
30 sec later 4-way valve : OFF
36 sec later compressor : ON
After compressor operation time passed for
1 minute, when a high-pressure sensor
detected more than 2.09MPaG.
or
Compressor ON time: Maximum 15 minutes
Defrost end
01-20
(Not defrosted for 10 minutes)
Integrating defrost
(Constant monitoring)
Compressor
OFF count :
40 times
Fan defrost
[Outdoor temperature]
-10
Compressor
integrating
operation:
Over 240 minutes
Outdoor
heat exchanger
temp.:
Below - 3°C
5
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