Midea V8 VRF Series Service Manual page 33

V8 VRF Indoor Units
4.4.3 Anti-cold Air Control
This function only be used in heating mode, fan speed is changed according to value changes of the heat exchanger
intermediate temperature (T2) of the heat exchanger liquid pipe temperature (T2A) and High pressure equivalent
saturation temperature (TC). While in anti-cold air mode, set temperature (Ts) is displayed normally. Anti-cold air control is
valid during the oil return or defrosting period. If the IDU is turned off, the fan is turned off as well.
T_fanoff is the switch temperature point between Breeze and Fan off can be adjusted by controller.
4.4.4 Standby fan speed Control

Cooling standby
The default cooling standby fan speed is Speed 1. You can change the cooling standby fan speed from speed 1 to speed 7
through the controller.
The parameter setting code is "N18".

Heating standby
The default heating standby is Termal wind speed. The speed 1 runs for 1 minute and stops for X minutes (X is the set value
by the controller) which can be set from 4 minutes (default), 8 minutes, 12 minutes and 16 minutes (The parameter setting
code is "N21") . And You can change the heating standby fan speed through the controller (The parameter setting code is
"N20").
Termal: In the heating mode, The IDU in the standby state heating mode will run fan periodically at speed 1 for one minute (the period can be set by controller)
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