Outdoor Unit Fan Control In Cooling Operation - Daikin VRV III REYQ8PY1 Service Manual

Si37-701
2.5

Outdoor Unit Fan Control in Cooling Operation

While in cooling operation, if the outdoor temperature is low, this mode provides high-pressure
control using the outdoor unit fan to retain appropriate liquid pressure, thus ensuring refrigerant
circulation rate to be supplied to indoor units.
Function
Pc>3.28MPa
Pc>3.18MPa
Pc>3.08MPa
Lapse of 20 sec.
-1 step on
outdoor unit fan
PI control
Fan step 9
PI control
Fan step 8
PI control
Fan step 7
PI control
PI control
Hold the current
step on outdoor
unit fan
Lapse of 20 sec.
Basic Control
+1 step on
outdoor unit fan
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