(Optional) Setting the Pressure Difference Control

Procedure

1. On the home screen, choose Settings > System Settings > Indoor fan, set Air-side difference pressure sensor type to 0~50 Pa.
2. Set Indoor fan control type to Pressure diff ctrl.
3. Change the other parameters based on the following instructions.
   Table 4-6 Parameter description

   Parameter	Description	Configuration Principle
   Indoor fan control type	Sets the control type for the indoor fan.	Normally, retain R/S air temp diff rate ctrl. If the differential pressure sensors are configured, change to Pressure diff ctrl.
   Indoor fan pressure difference setpoint	Sets the value for the pressure difference control.	The default value is 10 Pa. When there are partial hot spots indoors, you are advised to raise the value to ensure that the air volume of the indoor fans is between 60%–70%.
   Air-side difference pressure sensor type	Sets the measuring range for the air side differential pressure sensor.	There is no default value. Set it to 0~50 Pa.
   Min indoor fan speed	Sets the minimum speed for the indoor fan.	The default value is 30%. You are advised not to change the value.
   Max indoor fan speed	Sets the maximum speed for the indoor fan.	The default value is NA.