4-6. Defrosting Operation (Heating)
■
Defrosting Flowchart.
* Split System A:
(= Cooling cycle)
Split System A (or B)
Heating operation
Defrosting starts.
Defrosting
Cold draft prevention
Defrosting stops.
Split System B (or A)
Temperature in outdoor
heat exchanger
coil drops 1 deg/6 min.
or more and repeats
3 times continuously.
Heating operation
20 minutes masking
6 minutes masking
Temperature in outdoor
heat exchanger coil falls
to –14°C or lower.
Preparation for defrosting
Temperature in outdoor
heat exchanger coil is
26°C or higher.
Defrosting starts.
Cold draft prevention
Defrosting time is over
13.5 minutes.
Indoor unit A
Compressor A
Solenoid coil A
* Split System B: Indoor unit B
Compressor B
Solenoid coil B
Defrosting
Defrosting stops.
*
*
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