Fan Settings
1. Changing the fan speed
1.1 Fan type: 3-speed fan
1.2 Fan type: ECM fan
You can change the fan speed with the following command set.
You can set the fan speed with the command:
Byte index | Hex value β Meaning |
0 | 44 β The command code. |
1 | 00: Automatic. 01: Fan speed 1. 02: Fan speed 2. ... 06: Fan speed 6. |
Example downlink: 0x4404 β Sets the fan speed 4.
2. Limiting the selectable fan speed
This only reflects what's selectable through the device's buttons.
2.1. Fan type: 3-speed fan
You can change the fan speed limit with the following set of commands.
2.2 Fan type: ECM fan
Description pending
3. ECM Fan Settings
The following commands are for advanced users only.
Use with great caution.
3.1. ECM Fan min/max control voltage settings.
You can change the minimum and maximum voltage of the ECM fan with the following set of commands.
The command adjusts the voltage range of the ECM fan.
Byte index | Hex value β Meaning |
0 | 48 β The command code. |
1 | XX - Vmin[V] * 10. Default value: 0x1E (3V). |
2 | XX - Vmax[V] * 10. Default value: 0x64 (10V). |
Example downlink: 0x481947;
Sets the Vmin = 2,5V => 2,5 * 10 = 25 convert to HEX 0x19.
Sets the Vmax = 7,1V => 7,1 * 10 = 71 convert to HEX 0x47.
Adjustable range is 0β¦10V (0,1V resolution).
3.2. ECM Relay (F-ON)
This commands allow you to set/get the ECM relay (F-ON) - whether it's activated or deactivated at all.
3.3. ECM start up time
The ECM fan starts at maximum speed for a specified start up time.
Acceptable values: 0...20 seconds (1sec. resolution).
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