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10. FUNCTION
Defrosting Flowchart in Heating
Defrosting Mode Timing Chart
Compressor
Solenoid coil
(4-way valve)
Outdoor heat +5 °C
exch coil
temp.
NOTE
At the beginning and end of the defrosting operation, you may hear a loud noise lasting several seconds. This is
not a malfunction. It is the sound of the 4–way valve switching and the sound of the refrigerant when the 4–way
valve changes the direction of refrigerant flow.
Start of defrosting
ON
Fan motor
SET SPEED
–8.5 °C
Compressor ON
Temperature of outdoor heat
exchanger coil is blow –8.5°C
YES
Defrosting begins
Cold-draft prevention
Temperature of outdoor heat
exchanger coil is higher than
5°C.
YES
Release of defrosting
OFF
OFF
23
NO
NO
Release of defrosting
ON
ON
ON
SET SPEED
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