Defrosting Operation - Technibel GR54M2R Technical Data & Service Manual

9-6. Defrosting Operation (Heating)
Defrosting Flowchart.
* Split System A (or B)
Heating operation
Defrosting starts.
Defrosting
Cold draft prevention
Defrosting stops.
* Split System B (or A)
Heating operation
20 minutes masking
Temperature in outdoor
heat exchanger
coil drops 1 deg/6 min.
or more and repeats
3 times continuously.
Preparation for defrosting
Defrosting starts.
Defrosting
Cold draft prevention
Temperature in outdoor
heat exchanger coil is
26°C or higher.
Defrosting stops.
23
* Split System A:
* Split System B: Indoor unit B
6 minutes masking
Temperature in outdoor
heat exchanger coil falls
to –14°C or lower.
(= Cooling cycle)
Defrosting time is over
13.5 minutes.
Indoor unit A
Compressor A
Solenoid coil A
Compressor B
Solenoid coil B