Antifreeze Control - Panasonic S-80MW1E5 Service Manual & Test Run Service Manual

15. Antifreeze Control

15. Antifreeze Control

Water pump turns ON when ALL below conditions are fulfilled:
Heatpump OFF (stand by)
Water flow switch is not abnormal and water pump is not abnormal.
Outdoor temperature < 3˚C or Outdoor temperature sensor is abnormal or temperature cannot get
more than 3 minutes
Water inlet / outlet temperature < 6˚C.
After 5 minutes from previous water pump OFF.
The Test run for water circuit is performed.
After water pump ON for 4 minutes
Water outlet temp.
Water inlet temp.
4˚C over
Between -5˚C and 4˚C
Outdoor
less than -5˚C
temp.
or sensor error
or temperature cannot get
more than 3 minutes
less than 28˚C
between
less than 8˚C
8˚C and 20˚C
Water Pump ON
Internal heater ON
2 - 13
Air-to-Water Indoor Unit
more than 20˚C
Antifreeze control complete
(Water Pump and Heater OFF)
2
more than 28˚C
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