Refrigerant Recovery Control - Mitsubishi Electric CMB-WP1016V-GA1 Service Handbook

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Refrigerant Recovery Control

-8- Refrigerant Recovery Control
The refrigerant recovery control function controls the refrigerant flow at the HBC controller during heating operation to keep
the refrigerant from collecting inside the HBC controller.
It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor
heat exchanger.
Starting criteria for the refrigerant recovery cycle (during Cooling-only, Cooling-main, Heating-only, or Heating-main
mode)
The refrigerant recovery mode starts when all of the following conditions are met:
1) When 5 minutes have passed in the Heating-only or Heating-main mode or 30 seconds have passed in the Cooling-only or
Cooling-main mode since the completion of the previous refrigerant recovery cycle AND the when following conditions are
met.
Outdoor unit TH4 > 105°C [221°F]
2) When the port is not in the 4-minute restart delay mode
Starting criteria for the refrigerant recovery cycle (during Cooling-only, Cooling-main, Heating-only, or Heating-main
mode)
The opening of LEV1 and LEV2 on the HBC is increased.
HWE1410A
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GB