8-7. Defrosting Operation (Heating)
■
Defrosting Flowchart
Compressor ON
Indoor heat exchanger coil
temperature drops 0.8
°
C per
6 minutes and it repeats
3 times in succession.
Integrated operating time of
compressor is more than 3
hours.
Defrosting begins.
Cold-draft prevention
Temperature of outdoor heat
exchange coil is higher than
12
°
C.
Release of defrosting
Indoor fan runs at set speed
when temperature of indoor
heat exchanger reads 34
°
C.
B
Defrosting time is over 12
minutes.
No LL fan operation during this period.
Compressor keeps running
for at least 6 minutes.
Temperature of outdoor heat
exchanger coil is below 9
°
C.
Integrated operating time of
compressor is more than 1.5
hours.
Thermo. OFF.
(Compressor OFF)
C
D
Temperature of indoor heat
exchanger coil is below 40
°
C.
Continuous operating time of
compressor is more than 20
minutes.
Outdoor fan is either operated
or stopped for more than 10
minutes.
A
Is outdoor fan continuously
operating for more than 10
minutes?
Integrated operating time of
compressor is more than 50
minutes.
Temperature of indoor heat
exchanger coil is below 40 +
13
°
C.
Temp. of indoor heat exch.
coil immediately before thermo
goes off is either below 40 + 4
°
C
or 53 + 4
°
C (when overload
prevention works).
NO
NO
NO
YES
YES
YES
Overload
prevention works.
Does outdoor fan
stop?
Compressor keeps running for
at least 6 minutes.
Release of overload prevention
(Outdoor fan operates.)
Compressor keeps running for
at least 6 minutes.
NOTE
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