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8-7. Defrosting Operation (Heating)
■ Defrosting Flowchart
Compressor ON
Indoor heat exchanger coil
temperature drops 1.4¡F 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
54¡F.
Release of defrosting
Indoor fan runs at set speed
when temperature of indoor
heat exchanger reads 95¡F.
B
Defrosting time is over 12
minutes.
Compressor keeps running
for at least 6 minutes.
Temperature of outdoor heat
exchanger coil is below 48¡F.
Integrated operating time of
compressor is more than 1.5
hours.
Thermo. OFF.
(Compressor OFF)
CD
Temperature of indoor heat
exchanger coil is below 113¡F.
Temperature of indoor heat
exchanger coil is below 113¡F.
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 113 +
23¡F.
Temp. of indoor heat exch.
coil immediately before thermo
goes off is either below 113 + 7¡F
or 136 + 7¡F (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.
000-111 SM (18-68) 00.3.17 11:49 AM y[W 52