1. Changing the fan speed
If the fan speed is set to auto, the actual speed is determined by an algorithm explained here. It's also reported in the keepalive of the device.
1.1 Fan type: 3-speed fan
You can set the fan speed with the command:
| |
| |
| 00: Automatic.
01, 02: Low.
03, 04: Medium.
05, 06: High. |
Example command: 0x4402 – Sets fan speed to Low.
You can get the fan speed with the command. The keepalive data in the example below is omitted for clarity.
| | |
| | |
| | 00: Fan speed is automatic.
02: Fan speed is Low.
04: Fan speed is Medium.
06: Fan speed is High. |
Example command: 0x45;
Example response: 0x4502 – Fan speed is set to Low.
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:
| |
| |
| 00: Automatic.
01: Fan speed 1.
02: Fan speed 2. ...
06: Fan speed 6. |
Example downlink: 0x4404 – Sets the fan speed 4.
This command gets the ECM fan speed. The keepalive data in the example below is omitted for clarity.
| | |
| | |
| | 00: Automatic.
01: Fan speed 1.
02: Fan speed 2. ...
06: Fan speed 6. |
Example downlink sent by the server: 0x45;
Example command: 0x4504 – The fan speed is 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.
You can set the fan speed limit with the command:
| |
| |
| 00: Low / Medium / High. Default value.
01: Low / Medium.
02: Low.
03: Fan control deactivated. |
Example downlink: 0x4601 – Sets the fan speed limit to Low / Medium.
This command gets the target temperature. The keepalive data in the example below is omitted for clarity.
| | |
| | |
| | XX - Fan speed limit value. |
Example downlink sent by the server: 0x47;
Example command: 0x4701 – The fan speed limit is Low / Medium.
2.2 Fan type: ECM fan
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.
| |
| |
| XX - Vmin[V] * 10. Default value: 0x1E (3V). |
| 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.
The command extracts the voltage range of the ECM fan.
Vmin/max[V] = XX / 10;
Example downlink sent by the server: 0x49;
Example command: 0x491947;
0x19 convert to DEC 25 => Vmin = 25 / 10 = 2,5V.
0x47 convert to DEC 71 => Vmax = 71 / 10 = 7,1V.
Adjustable range is 0…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.
Set the ECM relay to activated/deactivated.
| |
| |
| 00: Deactivated the ECM relay (F-ON); 01: Activated the ECM relay (F-ON). Default state. |
Example downlink: 0x4C01 – Activated the ECM relay (F-ON).
Get the status of the ECM relay.
| | |
| | |
| | 00: The ECM relay (F-ON) is deactivated.
01: The ECM relay (F-ON) is activated. |
Example downlink sent by the server: 0x4D;
Example command response: 0x4D01 – The ECM relay (F-ON) is activated.
3.3. ECM start up time
The ECM fan starts at maximum speed for a specified start up time.
Set up the start up time.
| |
| |
| XX - ECM start up time. Default value: 0x00 (The function is deactivated). |
Example downlink: 0x4A03 - Sets the ECM start up time to 3 seconds.
Get up the the start up time.
Example downlink sent by the server: 0x4B;
Example command response: 0x4B03 – The ECM start up time is 3 seconds.
Acceptable values: 0...20 seconds (1sec. resolution).
Last updated
