4.4 Fan Control
4.4.1 Fan speeds control
The IDU can work in seven-speeds
Seven-speeds
When the Indoor Unit detects only seven wind speeds the wind speed is set as follows.
For the specific model type, please consult the technical manual of each model. The following table describes the fan
control in different situations
Fan control in different situations
Automatic cooling, automatic fan speed,
automatic heating, and Termal mode
operating
Note:
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)
4.4.2 Auto fan control mode
1. When set auto fan control in cooling or heating mode. After operation in the initial speed for a period of time, when
Thermal ON, IDUs enter the auto mode and the fan speed will be changed every 2 minutes or when Ts change.
2. When Thermal OFF, IDUs enter the standby mode. When Thermal ON, IDUs enters the initial fan speed again.
3. The default speed is speed 1 when IDUs are set auto fan mode in Air supply only mode.
Determine the initial fan speed of auto fan control
The initial fan speed is determined according to the difference
between ambient indoor temperature (T1) and set temperature (TS),
and it updates in the following situations:
1) The first time enter this mode
2) TS is changed
3) When switching between normal operation and silent operation
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