Defrosting Operation (Heating) - Sanyo STW-2 Series Technical & Service Manual

10-4. Defrosting Operation (Heating)

Heat Pump Models
Defrosting Flowchart
Defrosting Mode Timing Chart
Compressor
Electric heater
Solenoid coil
(4-way valve)
Fan motor
41 °F
Outdoor heat
exch. coil
14 °F
temp.
Once the air conditioner enters defrosting mode, it will not release defrosting until the
NOTE
outdoor heat exchanger coil temperature rises above 41°F. During this period, heat is
provided by the electric heater instead of by heat pump.
Compressor ON
Temperature of outdoor heat
exchanger coil is below 14°F.
Defrosting begins
Compressor
•
Electric heater
•
Temperature of outdoor heat
exchanger coil is higher than
41°F.
Release from defrosting
Start of defrosting
ON
OFF
Set speed
NO
YES
⇒ OFF
⇒ ON
NO
YES
Release from defrosting
OFF
ON ON
ON
60
ON
OFF
ON