Difference between revisions of "Domekt Komfovent C4 Plus Modbus Registers"
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| Line 231: | Line 231: | ||
| Ex. 20 | | Ex. 20 | ||
| 20 | | 20 | ||
|- | |- | ||
| 10010 | | 10010 | ||
| Line 263: | Line 262: | ||
| '''Description''' | | '''Description''' | ||
| '''Data values''' | | '''Data values''' | ||
| '''Default value''' | |||
|- | |- | ||
| 10099 | | 10099 | ||
| Line 270: | Line 270: | ||
| Ventilation intensity level (manual mode) | | Ventilation intensity level (manual mode) | ||
| 1-Low fan speed (60VAC), <br>2-Normal fan speed (recommended) (150VAC), <br>3-High fan speed (230VAC) | | 1-Low fan speed (60VAC), <br>2-Normal fan speed (recommended) (150VAC), <br>3-High fan speed (230VAC) | ||
| 2 | |||
|- | |- | ||
| 10100 | | 10100 | ||
| Line 277: | Line 278: | ||
| Ventilation intensity level current | | Ventilation intensity level current | ||
| 0-Standby, <br>1-Low fan speed, <br>2-Normal fan speed, <br>3-High fan speed, <br>4-Override mode (OVR-register enabled or FC-wiring closed) | | 0-Standby, <br>1-Low fan speed, <br>2-Normal fan speed, <br>3-High fan speed, <br>4-Override mode (OVR-register enabled or FC-wiring closed) | ||
| - | |||
|- | |- | ||
| 10101 | | 10101 | ||
| Line 284: | Line 286: | ||
| Control mode (Auto/Manual) (no Comfort or Economy mode available) | | Control mode (Auto/Manual) (no Comfort or Economy mode available) | ||
| 0-Manual (preset fan speed), 1-Auto (schedule) | | 0-Manual (preset fan speed), 1-Auto (schedule) | ||
| 0 | |||
|- | |- | ||
| 10102 | | 10102 | ||
| Line 291: | Line 294: | ||
| Supply ventilation intensity level 1 (EC-type fan) | | Supply ventilation intensity level 1 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10103 | | 10103 | ||
| Line 298: | Line 302: | ||
| Supply ventilation intensity level 2 (EC-type fan / AC-type fan) | | Supply ventilation intensity level 2 (EC-type fan / AC-type fan) | ||
| 20 to 100% (EC-fan), 0 to 2 (AC-fan) | | 20 to 100% (EC-fan), 0 to 2 (AC-fan) | ||
| 60 | |||
|- | |- | ||
| 10104 | | 10104 | ||
| Line 305: | Line 310: | ||
| Supply ventilation intensity level 3 (EC-type fan) | | Supply ventilation intensity level 3 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10105 | | 10105 | ||
| Line 312: | Line 318: | ||
| Supply ventilation intensity level 4 (EC-type fan) | | Supply ventilation intensity level 4 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10106 | | 10106 | ||
| Line 319: | Line 326: | ||
| Exhaust ventilation intensity level 1 (EC-type fan) | | Exhaust ventilation intensity level 1 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10107 | | 10107 | ||
| Line 326: | Line 334: | ||
| Exhaust ventilation intensity level 2 (EC-type fan / AC-type fan) | | Exhaust ventilation intensity level 2 (EC-type fan / AC-type fan) | ||
| 20 to 100% (EC-fan), 0 to 2 (AC-fan) | | 20 to 100% (EC-fan), 0 to 2 (AC-fan) | ||
| 60 | |||
|- | |- | ||
| 10108 | | 10108 | ||
| Line 333: | Line 342: | ||
| Exhaust ventilation intensity level 3 (EC-type fan) | | Exhaust ventilation intensity level 3 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10109 | | 10109 | ||
| Line 340: | Line 350: | ||
| Exhaust ventilation intensity level 4 (EC-type fan) | | Exhaust ventilation intensity level 4 (EC-type fan) | ||
| 20 to 100% (EC-fan only) | | 20 to 100% (EC-fan only) | ||
| - | |||
|- | |- | ||
| 10110 | | 10110 | ||
| Line 347: | Line 358: | ||
| Override/OVR-mode, enables fan intensity level 4 (maximum) for a set time period | | Override/OVR-mode, enables fan intensity level 4 (maximum) for a set time period | ||
| 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running | | 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running | ||
| 0 | |||
|- | |- | ||
| 10111 | | 10111 | ||
| Line 354: | Line 366: | ||
| Override mode timer duration | | Override mode timer duration | ||
| 1 to 90 minutes | | 1 to 90 minutes | ||
| 30 | |||
|- | |- | ||
| 10112 | | 10112 | ||
| Line 361: | Line 374: | ||
| Override timer count down | | Override timer count down | ||
| 0 to 90 minutes | | 0 to 90 minutes | ||
| - | |||
|- | |- | ||
|} | |} | ||
| Line 376: | Line 390: | ||
| '''Description''' | | '''Description''' | ||
| '''Data values''' | | '''Data values''' | ||
| '''Default value''' | |||
|- | |- | ||
| 10199 | | 10199 | ||
| Line 383: | Line 398: | ||
| Mon1 start time | | Mon1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10200 | | 10200 | ||
| Line 390: | Line 406: | ||
| Mon1 stop time | | Mon1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10201 | | 10201 | ||
| Line 397: | Line 414: | ||
| Mon2 start time | | Mon2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10202 | | 10202 | ||
| Line 404: | Line 422: | ||
| Mon2 stop time | | Mon2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10203 | | 10203 | ||
| Line 411: | Line 430: | ||
| Mon3 start time | | Mon3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10204 | | 10204 | ||
| Line 418: | Line 438: | ||
| Mon3 stop time | | Mon3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10205 | | 10205 | ||
| Line 425: | Line 446: | ||
| Tue1 start time | | Tue1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10206 | | 10206 | ||
| Line 432: | Line 454: | ||
| Tue1 stop time | | Tue1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10207 | | 10207 | ||
| Line 439: | Line 462: | ||
| Tue2 start time | | Tue2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10208 | | 10208 | ||
| Line 446: | Line 470: | ||
| Tue2 stop time | | Tue2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10209 | | 10209 | ||
| Line 453: | Line 478: | ||
| Tue3 start time | | Tue3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10210 | | 10210 | ||
| Line 460: | Line 486: | ||
| Tue3 stop time | | Tue3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10211 | | 10211 | ||
| Line 467: | Line 494: | ||
| Wed1 start time | | Wed1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10212 | | 10212 | ||
| Line 474: | Line 502: | ||
| Wed1 stop time | | Wed1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10213 | | 10213 | ||
| Line 481: | Line 510: | ||
| Wed2 start time | | Wed2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10214 | | 10214 | ||
| Line 488: | Line 518: | ||
| Wed2 stop time | | Wed2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10215 | | 10215 | ||
| Line 495: | Line 526: | ||
| Wed3 start time | | Wed3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10216 | | 10216 | ||
| Line 502: | Line 534: | ||
| Wed3 stop time | | Wed3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10217 | | 10217 | ||
| Line 509: | Line 542: | ||
| Thu1 start time | | Thu1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10218 | | 10218 | ||
| Line 516: | Line 550: | ||
| Thu1 stop time | | Thu1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10219 | | 10219 | ||
| Line 523: | Line 558: | ||
| Thu2 start time | | Thu2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10220 | | 10220 | ||
| Line 530: | Line 566: | ||
| Thu2 stop time | | Thu2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10221 | | 10221 | ||
| Line 537: | Line 574: | ||
| Thu3 start time | | Thu3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10222 | | 10222 | ||
| Line 544: | Line 582: | ||
| Thu3 stop time | | Thu3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10223 | | 10223 | ||
| Line 551: | Line 590: | ||
| Fri1 start time | | Fri1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10224 | | 10224 | ||
| Line 558: | Line 598: | ||
| Fri1 stop time | | Fri1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10225 | | 10225 | ||
| Line 565: | Line 606: | ||
| Fri2 start time | | Fri2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10226 | | 10226 | ||
| Line 572: | Line 614: | ||
| Fri2 stop time | | Fri2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10227 | | 10227 | ||
| Line 579: | Line 622: | ||
| Fri3 start time | | Fri3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10228 | | 10228 | ||
| Line 586: | Line 630: | ||
| Fri3 stop time | | Fri3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10229 | | 10229 | ||
| Line 593: | Line 638: | ||
| Sat1 start time | | Sat1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10230 | | 10230 | ||
| Line 600: | Line 646: | ||
| Sat1 stop time | | Sat1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10231 | | 10231 | ||
| Line 607: | Line 654: | ||
| Sat2 start time | | Sat2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10232 | | 10232 | ||
| Line 614: | Line 662: | ||
| Sat2 stop time | | Sat2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10233 | | 10233 | ||
| Line 621: | Line 670: | ||
| Sat3 start time | | Sat3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10234 | | 10234 | ||
| Line 628: | Line 678: | ||
| Sat3 stop time | | Sat3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10235 | | 10235 | ||
| Line 635: | Line 686: | ||
| Sun1 start time | | Sun1 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10236 | | 10236 | ||
| Line 642: | Line 694: | ||
| Sun1 stop time | | Sun1 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10237 | | 10237 | ||
| Line 649: | Line 702: | ||
| Sun2 start time | | Sun2 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10238 | | 10238 | ||
| Line 656: | Line 710: | ||
| Sun2 stop time | | Sun2 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10239 | | 10239 | ||
| Line 663: | Line 718: | ||
| Sun3 start time | | Sun3 start time | ||
| Ex. 08:05 => 0x0805 | | Ex. 08:05 => 0x0805 | ||
| - | |||
|- | |- | ||
| 10240 | | 10240 | ||
| Line 670: | Line 726: | ||
| Sun3 stop time | | Sun3 stop time | ||
| Ex. 15:05 => 0x0F05 | | Ex. 15:05 => 0x0F05 | ||
| - | |||
|- | |- | ||
| 10241 | | 10241 | ||
| Line 677: | Line 734: | ||
| Mon1 ventilation level (fan speed) | | Mon1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10242 | | 10242 | ||
| Line 684: | Line 742: | ||
| Mon2 ventilation level (fan speed) | | Mon2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10243 | | 10243 | ||
| Line 691: | Line 750: | ||
| Mon3 ventilation level (fan speed) | | Mon3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10244 | | 10244 | ||
| Line 698: | Line 758: | ||
| Tue1 ventilation level (fan speed) | | Tue1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10245 | | 10245 | ||
| Line 705: | Line 766: | ||
| Tue2 ventilation level (fan speed) | | Tue2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10246 | | 10246 | ||
| Line 712: | Line 774: | ||
| Tue3 ventilation level (fan speed) | | Tue3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10247 | | 10247 | ||
| Line 719: | Line 782: | ||
| Wed1 ventilation level (fan speed) | | Wed1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10248 | | 10248 | ||
| Line 726: | Line 790: | ||
| Wed2 ventilation level (fan speed) | | Wed2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10249 | | 10249 | ||
| Line 733: | Line 798: | ||
| Wed3 ventilation level (fan speed) | | Wed3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10250 | | 10250 | ||
| Line 740: | Line 806: | ||
| Thu1 ventilation level (fan speed) | | Thu1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10251 | | 10251 | ||
| Line 747: | Line 814: | ||
| Thu2 ventilation level (fan speed) | | Thu2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10252 | | 10252 | ||
| Line 754: | Line 822: | ||
| Thu3 ventilation level (fan speed) | | Thu3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10253 | | 10253 | ||
| Line 761: | Line 830: | ||
| Fri1 ventilation level (fan speed) | | Fri1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10254 | | 10254 | ||
| Line 768: | Line 838: | ||
| Fri2 ventilation level (fan speed) | | Fri2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10255 | | 10255 | ||
| Line 775: | Line 846: | ||
| Fri3 ventilation level (fan speed) | | Fri3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10256 | | 10256 | ||
| Line 782: | Line 854: | ||
| Sat1 ventilation level (fan speed) | | Sat1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10257 | | 10257 | ||
| Line 789: | Line 862: | ||
| Sat2 ventilation level (fan speed) | | Sat2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10258 | | 10258 | ||
| Line 796: | Line 870: | ||
| Sat3 ventilation level (fan speed) | | Sat3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10259 | | 10259 | ||
| Line 803: | Line 878: | ||
| Sun1 ventilation level (fan speed) | | Sun1 ventilation level (fan speed) | ||
| 0-Standby, 1-Low, 2-Normal, 3-High | | 0-Standby, 1-Low, 2-Normal, 3-High | ||
| - | |||
|- | |- | ||
| 10260 | | 10260 | ||
| Line 810: | Line 886: | ||
| Sun2 ventilation level (fan speed) | | Sun2 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
| 10261 | | 10261 | ||
| Line 817: | Line 894: | ||
| Sun3 ventilation level (fan speed) | | Sun3 ventilation level (fan speed) | ||
| 0 to 3 | | 0 to 3 | ||
| - | |||
|- | |- | ||
|} | |} | ||
Revision as of 16:26, 18 April 2024
Domekt Komfovent C4 control board is a AHU (Air Handling Unit) for use in a balanced HVAC system. The C4 is an older standard use from approx. 2010 to 2016.
If you have a unit without a control panel or want to interface the unit with an external automation. ex. Home Assistant, the following data will make that possible.
To make sure the unit works at all, jump the FC-wires together and the unit should start spinning at max. after three seconds. This confirms that the MCU works as expected.
- Domekt Komfovent C4 Modbus Register Document (PDF)
- Domekt Komfovent C4 Plus Modbus Register Document (PDF)
- Domekt Komfovent C4 (buttons) Installation and Operation Manual (PDF)
- Domekt Komfovent C4 (buttons) and C4 Plus (LCD) Installation and Operation Manual (PDF)
Tools
To manually interface with the unit over Modbus, I would recommend trying the trail version of Modbus Poll. You will have a complete control interface and can easily send queries and receive responses from the unit.
Later you can use Home Assistant to build an entire control panel, better than what is provided by the OEM.
Connection
Connect the unit to a computer using the provided RS485/ModBus cable extruding from the top. There is no need to add 820 Ohm 5V pull-up/gnd pull-down or 120 Ohm termination. It works fine as is.
The pin-out is as the following:
| RJ-45 flat cable | Wire color | Function |
|---|---|---|
| Pin 1 | - | Not used |
| Pin 2 | - | Not used |
| Pin 3 | Red | +24VDC |
| Pin 4 | Yellow | RS485 A+ |
| Pin 5 | Green | RS485 B- |
| Pin 6 | White | Gnd |
| Pin 7 | - | Not used |
| Pin 8 | - | Not used |
Modbus settings
To establish a working connection, it's important to match the following connection parameters. A single wrong setting will make the connection not work at all.
| Bits per second/baudrate | 19200 |
| Data bits/word length | 8 |
| Parity | Even |
| Stop bits | 1 |
It is also important to use the correct Modbus ID. It's the identifier on the bus and has to be correct in order for communication to happen with the AHU.
The C4 unit has a different Modbus ID than later models, so make sure to double check. Either of the following will work with only one unit on the Modbus line.
| Modbus ID | 20 (specific C4 identification address) 254 (common identification address) |
Register list
The C4 unit uses the following Modbus data register functions to read and write data.
A CR2032 battery keeps the registers concurrent when the unit is unplugged, ex. the time and date. Needs replacing after 8 years.
The unit will respond 01 Illegal register or 01 Illegal data register if you are trying to access something that does not exist. If you receive Timeout responses, make sure you use Modbus ID 20, cabling is correct, and the unit is plugged into the mains.
| Description | Modbus protocol | Function description | Unit properties |
|---|---|---|---|
| Read data | Function code 03 | Read Holding Registers / analog output holding registers | Operation status, temperatures, fans speed, and etc. |
| Write data single register | Function code 06 | Preset Single Register / analog output holding register | Turn on/off unit, set temperature, change auto/manual mode |
| Write multiple data registers | Function code 16 | Preset Multiple Registers / two analog output holding registers | Set multiple individual registers at once, similar to 06 |
Controller registers available on the C4 unit. When manually inquiring the unit, use the actual register address. This is because Domekt offsets the register address by add 9000 and subtract -1, ex. register address 1000 => 99999.
- EC = Stepper type fan motor, digitally controlled - DIP switch 3 set to ON
- AC = Regular alternating current type motor, transformer controlled - DIP switch 3 set to OFF
General
13 registers
| Modbus register actual | Type | Access | Range | Description | Data values | Default value |
| 9999 | Read/write | Integer | 0..1 | AHU start/stop control | 1-Start, 0-Stop | - |
| 10000 | Read/write | Integer | 0..1 | Season (heating permitted or prohibited) | 1-Winter, 0-Summer (heater off) | - |
| 10001 | Read | Integer | 0..14 | Alarm status (warnings) | 14-Service, 13-Heater off, 11-Rotor stop | - |
| 10002 | Read | Binary | 0x0..0xF [b3-b0, 0..1] Ex. 0x01=>64=>00000001 b0=1, rotating heat exchanger |
System configuration/DIP switch status | b0-Heat exchange type (0-RECU/1-REGO), b1-Heater type (0-Electric/1-Water), b2-Fan type (0-AC/1-EC), b3-OVR-mode (0-All fans/1-Exhaust fan stop) (1-On, 0-Off) |
- |
| 10003 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Time, hhmm | Ex. 8:05 => 0x0805, 18:30 => 0x121E (18=0x12, 30=0x1E) | - |
| 10004 | Read/write | Integer | 1-7 | Day of the week | 1-Mon, 2-Tue, 3-Wed, 4-Thu, 5-Fri, 6-Sat, 7-Sun | - |
| 10005 | Read/write | 2x Char/Int8 | 0x0101..0x0C1F | Month-day date, mmdd | Ex. 9th May => 0x0509, 31th Sept => 0x091F (Sept=0x09, 31=0x1F) | - |
| 10006 | Read/write | Integer | 2010-2200 | Year date, yyyy | Ex. 2023 | - |
| 10007 | Read | Binary | 0x00..0x7F [b7-b0, 0..1] Ex. 0x40=>64=>00000010 b1=1, supply sensor B1 fault |
Alarm status (stop flags) | b1-Supply sensor B1, b2-Heater overheating, b3-Water temp. low, b4-Rotor stop, b5-Frost possibility, b6-Air temp. high, b7-Air temp. low (1-Fault, 0-None) |
- |
| 10008 | Read | Integer | 0..28 | Alarm status (stop code) | 3-Rotor stop, 4-Heater overheating, 9-Supply sensor B1, 19-Air temp. low, 20-Air temp. high, 27-Water temp. low, 28-Frost possibility |
- |
| 10009 | Read/write | Integer | 1..100 | Modbus ID, default 20 | Ex. 20 | 20 |
| 10010 | Read/write | Integer | 0..1 | External heater control signal type | 0-0..12V analog voltage-type, 1-12V digital PWM-type (always 0 if heater configured as water type) |
- |
| 10011 | Read | - | - | Unknown | - |
Ventilation
14 registers
| Modbus register actual | Type | Access | Range | Description | Data values | Default value |
| 10099 | Read/write | Integer | 1..3 | Ventilation intensity level (manual mode) | 1-Low fan speed (60VAC), 2-Normal fan speed (recommended) (150VAC), 3-High fan speed (230VAC) |
2 |
| 10100 | Read | Integer | 0..4 | Ventilation intensity level current | 0-Standby, 1-Low fan speed, 2-Normal fan speed, 3-High fan speed, 4-Override mode (OVR-register enabled or FC-wiring closed) |
- |
| 10101 | Read/write | Integer | 0..1 | Control mode (Auto/Manual) (no Comfort or Economy mode available) | 0-Manual (preset fan speed), 1-Auto (schedule) | 0 |
| 10102 | Read/write | Integer | 20..100 / 0 | Supply ventilation intensity level 1 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10103 | Read/write | Integer | 20..100 / 0..2 | Supply ventilation intensity level 2 (EC-type fan / AC-type fan) | 20 to 100% (EC-fan), 0 to 2 (AC-fan) | 60 |
| 10104 | Read/write | Integer | 20..100 / 0 | Supply ventilation intensity level 3 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10105 | Read/write | Integer | 20..100 / 0 | Supply ventilation intensity level 4 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10106 | Read/write | Integer | 20..100 / 0 | Exhaust ventilation intensity level 1 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10107 | Read/write | Integer | 20..100 / 0..2 | Exhaust ventilation intensity level 2 (EC-type fan / AC-type fan) | 20 to 100% (EC-fan), 0 to 2 (AC-fan) | 60 |
| 10108 | Read/write | Integer | 20..100 / 0 | Exhaust ventilation intensity level 3 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10109 | Read/write | Integer | 20..100 / 0 | Exhaust ventilation intensity level 4 (EC-type fan) | 20 to 100% (EC-fan only) | - |
| 10110 | Read/write | Integer | 0..1 | Override/OVR-mode, enables fan intensity level 4 (maximum) for a set time period | 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running | 0 |
| 10111 | Read/write | Integer | 1..90 | Override mode timer duration | 1 to 90 minutes | 30 |
| 10112 | Read | Integer | 0..90 | Override timer count down | 0 to 90 minutes | - |
Scheduler
63 registers
| Modbus register actual | Type | Access | Range | Description | Data values | Default value |
| 10199 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon1 start time | Ex. 08:05 => 0x0805 | - |
| 10200 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10201 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon2 start time | Ex. 08:05 => 0x0805 | - |
| 10202 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10203 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon3 start time | Ex. 08:05 => 0x0805 | - |
| 10204 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Mon3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10205 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue1 start time | Ex. 08:05 => 0x0805 | - |
| 10206 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10207 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue2 start time | Ex. 08:05 => 0x0805 | - |
| 10208 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10209 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue3 start time | Ex. 08:05 => 0x0805 | - |
| 10210 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Tue3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10211 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed1 start time | Ex. 08:05 => 0x0805 | - |
| 10212 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10213 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed2 start time | Ex. 08:05 => 0x0805 | - |
| 10214 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10215 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed3 start time | Ex. 08:05 => 0x0805 | - |
| 10216 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Wed3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10217 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu1 start time | Ex. 08:05 => 0x0805 | - |
| 10218 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10219 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu2 start time | Ex. 08:05 => 0x0805 | - |
| 10220 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10221 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu3 start time | Ex. 08:05 => 0x0805 | - |
| 10222 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Thu3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10223 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri1 start time | Ex. 08:05 => 0x0805 | - |
| 10224 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10225 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri2 start time | Ex. 08:05 => 0x0805 | - |
| 10226 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10227 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri3 start time | Ex. 08:05 => 0x0805 | - |
| 10228 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Fri3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10229 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat1 start time | Ex. 08:05 => 0x0805 | - |
| 10230 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10231 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat2 start time | Ex. 08:05 => 0x0805 | - |
| 10232 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10233 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat3 start time | Ex. 08:05 => 0x0805 | - |
| 10234 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sat3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10235 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun1 start time | Ex. 08:05 => 0x0805 | - |
| 10236 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun1 stop time | Ex. 15:05 => 0x0F05 | - |
| 10237 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun2 start time | Ex. 08:05 => 0x0805 | - |
| 10238 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun2 stop time | Ex. 15:05 => 0x0F05 | - |
| 10239 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun3 start time | Ex. 08:05 => 0x0805 | - |
| 10240 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Sun3 stop time | Ex. 15:05 => 0x0F05 | - |
| 10241 | Read/write | Integer | 0..3 | Mon1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10242 | Read/write | Integer | 0..3 | Mon2 ventilation level (fan speed) | 0 to 3 | - |
| 10243 | Read/write | Integer | 0..3 | Mon3 ventilation level (fan speed) | 0 to 3 | - |
| 10244 | Read/write | Integer | 0..3 | Tue1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10245 | Read/write | Integer | 0..3 | Tue2 ventilation level (fan speed) | 0 to 3 | - |
| 10246 | Read/write | Integer | 0..3 | Tue3 ventilation level (fan speed) | 0 to 3 | - |
| 10247 | Read/write | Integer | 0..3 | Wed1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10248 | Read/write | Integer | 0..3 | Wed2 ventilation level (fan speed) | 0 to 3 | - |
| 10249 | Read/write | Integer | 0..3 | Wed3 ventilation level (fan speed) | 0 to 3 | - |
| 10250 | Read/write | Integer | 0..3 | Thu1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10251 | Read/write | Integer | 0..3 | Thu2 ventilation level (fan speed) | 0 to 3 | - |
| 10252 | Read/write | Integer | 0..3 | Thu3 ventilation level (fan speed) | 0 to 3 | - |
| 10253 | Read/write | Integer | 0..3 | Fri1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10254 | Read/write | Integer | 0..3 | Fri2 ventilation level (fan speed) | 0 to 3 | - |
| 10255 | Read/write | Integer | 0..3 | Fri3 ventilation level (fan speed) | 0 to 3 | - |
| 10256 | Read/write | Integer | 0..3 | Sat1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10257 | Read/write | Integer | 0..3 | Sat2 ventilation level (fan speed) | 0 to 3 | - |
| 10258 | Read/write | Integer | 0..3 | Sat3 ventilation level (fan speed) | 0 to 3 | - |
| 10259 | Read/write | Integer | 0..3 | Sun1 ventilation level (fan speed) | 0-Standby, 1-Low, 2-Normal, 3-High | - |
| 10260 | Read/write | Integer | 0..3 | Sun2 ventilation level (fan speed) | 0 to 3 | - |
| 10261 | Read/write | Integer | 0..3 | Sun3 ventilation level (fan speed) | 0 to 3 | - |
Temperature
6 registers
| Modbus register actual | Type | Access | Range | Description | Data values |
| 10299 | Read | Integer | -300..750 | Supply air temperature, C (sensor B1, after heat exchanger and heater element, to rooms) | -30 to 75C, 10x C, ex. 250 => 25.0C |
| 10300 | Read/write | Integer | 100..400 | Supply set point temperature, C (for calculation of recuperation, heating levels) | 10 to 40C, 10x C, ex. 25.0C => 250 |
| 10301 | Read/write | Integer | -90..90 | Temperature correction, C (time based, lower or raise temperature in a set period) | -9 to +9C, 10x C, ex. +4.5C => 45 |
| 10302 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Temperature correction start time | Ex. 08:05 => 0x0805 |
| 10303 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Temperature correction stop time | Ex. 15:05 => 0x0F05 (15=0x0F, 05=0x05) |
| 10304 | Read | Integer | -100..1100 | Water temperature, C (external, sensor B5, if installed, DIP switch 2 set to ON) | -10 to 110C, 10x C, ex. 320 => 32.0C |
Operation control panel (not in tech doc)
29 registers
| Modbus register actual | Type | Access | Range | Description | Data values |
| 10399 | Read | Binary | 0x0..0xF [b3-b0, 0..1] Ex. 0x01=>64=>00000001 b0=1, rotating heat exchanger |
System configuration/DIP switch status | b0-Heat exchange type (0-RECU/1-REGO), b1-Heater type (0-Electric/1-Water), b2-Fan type (0-AC/1-EC), b3-OVR-mode (0-All fans/1-Exhaust fan stop) (1-On, 0-Off) |
| 10400 | Read/write | Integer | 0..1 | AHU start/stop control | 1-Start, 0-Stop |
| 10401 | Read/write | Integer | 0..1 | Control mode (Auto/Manual) (no Comfort or Economy mode available) | 0-Manual (preset fan speed), 1-Auto (schedule) |
| 10402 | Read/write | Integer | 1..3 | Ventilation intensity level (manual mode) | 1-Low fan speed (60VAC), 2-Normal fan speed (recommended) (150VAC), 3-High fan speed (230VAC) |
| 10403 | Read | Integer | 0..4 | Ventilation intensity level current | 0-Standby, 1-Low fan speed, 2-Normal fan speed, 3-High fan speed, 4-Override mode (OVR-register enabled or FC-wiring closed) |
| 10404 | Read | Integer | 0..100 | Supply fan level 0 set point | 0 to 100% |
| 10405 | Read | Integer | 0..100 | Supply fan level 1 set point | 0 to 100% |
| 10406 | Read | Integer | 0..100 | Supply fan level 2 set point | 0 to 100% |
| 10407 | Read | Integer | 0..100 | Exhaust fan level 0 set point | 0 to 100% |
| 10408 | Read | Integer | 0..100 | Exhaust fan level 1 set point | 0 to 100% |
| 10409 | Read | Integer | 0..100 | Exhaust fan level 2 set point | 0 to 100% |
| 10410 | Read | Integer | 0..100 | Override supply fan level set point | 0 to 100% |
| 10411 | Read | Integer | 0..100 | Override exhaust fan level set point (for standby/0%, set DIP switch 4 to ON) | 0 to 100% |
| 10412 | Read/write | Integer | 0..300 | Supply set point temperature, C (for calculation of recuperation, heating levels) | 0 to 30C, 10x C, ex. 25.0C => 250 |
| 10413 | Read/write | Integer | 0..1 | Season (heating permitted or prohibited) | 1-Winter, 0-Summer (air heating off) |
| 10414 | Read/write | Integer | -90..90 | Temperature correction, C (time based, lower or raise temperature in a set period) | -9 to +9C, 10x C, ex. +4.5C => 45 |
| 10415 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Temperature correction start time | Ex. 08:05 => 0x0805 |
| 10416 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Temperature correction stop time | Ex. 15:05 => 0x0F05 (15=0x0F, 05=0x05) |
| 10417 | Read | Integer | -300..750 | Supply air temperature, C (after heat exchanger and heater element, to rooms) | -30 to 75C, 10x C, ex. 250 => 25.0C |
| 10418 | Read | Integer | -100..1100 | Water temperature, C (external, if installed, DIP switch 2 set to ON) | -10 to 110C, 10x C, ex. 320 => 32.0C |
| 10419 | Read | Integer | 0..100 | Recuperation level (rotating heat exchanger, DIP switch 1 set to ON - not adjustable directly only through supply set point temperature) | 0 to 100% |
| 10420 | Read | Integer | 0..100 | Supply fan level current | 0 to 100% |
| 10421 | Read | Integer | 0..100 | Exhaust fan level current | 0 to 100% |
| 10422 | Read | Integer | 0..100 | Electric heater level current (heating element, DIP switch 2 set to OFF) | 0 to 100% |
| 10423 | Read | Integer | 0..100 | Water heating level current (external, if installed, DIP switch 2 set to ON) | 0 to 100% |
| 10424 | Read | Integer | 0..100 | Water cooling level current (external, if installed, DIP switch 2 set to ON) | 0 to 100% |
| 10425 | Read | - | - | Unknown | |
| 10426 | Read | Integer | 0..14 | Alarm status (warnings) | 14-Service, 13-Heater off, 11-Rotor stop |
| 10427 | Read | Integer | 0..28 | Alarm status (stop code) | 3-Rotor stop, 4-Heater overheating, 9-Supply sensor B1, 19-Air temp. low, 20-Air temp. high, 27-Water temp. low, 28-Frost possibility |
Alarm history
701 registers
| Modbus register actual | Type | Access | Range | Description | Data values |
| 10499 | Read/write | Integer | 0..50 | Alarm history count | Length of log to keep |
| 10500 | Read | Integer | 2010..2200 | Alarm1 (newest) year | Ex. 2023 |
| 10501 | Read | 2x Char/Int8 | 0x0101..0x0C1F | Alarm1 (newest) month-day | Ex. 9th May => 0x0509, 31th Sept => 0x091F (Sept=0x09, 31=0x1F) |
| 10502 | Read | 2x Char/Int8 | 0x0000..0x183B | Alarm1 (newest) hour-minute | Ex. 08:05 => 0x0805 |
| 10503 | Read | Integer | 0..28 | Alarm1 (newest) alarm stop and warning code | Ex. 14-Service |
| .. | Alarm2..Alarm49 | ||||
| 10696 | Read | Integer | 2010..2200 | Alarm50 (oldest) year | Ex. 2023 |
| 10697 | Read | 2x Char/Int8 | 0x0101..0x0C1F | Alarm50 (oldest) month-day | Ex. 9th May => 0x0509, 31th Sept => 0x091F (Sept=0x09, 31=0x1F) |
| 10698 | Read | 2x Char/Int8 | 0x0000..0x183B | Alarm50 (oldest) hour-minute | Ex. 08:05 => 0x0805 |
| 10699 | Read | Integer | 0..28 | Alarm50 (oldest) alarm stop and warning code | Ex. 14-Service |
Misc
4 registers, 4 registers
| Modbus register actual | Type | Access | Range | Description | Data values |
| 10799 | Read | Integer | 0..100 | Internal heater level current (heating element, DIP switch 2 set to OFF) | 0 to 100% |
| 10800 | Read | Integer | 0..100 | External/water heating level current (external, if installed, DIP switch 2 set to ON) | 0 to 100% |
| 10801 | Read | Integer | 0..100 | Service time counter | 0 to 100, when reached 100, it is service time (alarm warning 14) |
| 10802 | Read | Integer | 0..200 | AHU software program version | 100-V1.00, 103-V1.03 |
| 10889 | Read/write | Integer | -100..100 | V1 0.10V calibration value | -10..+10%, 10x, 1% => 10 (Write 0x99C4 to store to memory) |
| 10890 | Read/write | Integer | -100..100 | V2 0.10V calibration value | -10..+10%, 10x, 1% => 10 (Write 0x99C4 to store to memory) |
| 10891 | Read/write | Integer | -100..100 | External heater level calibration value | -10..+10%, 10x, 1% => 10 (Write 0x99C4 to store to memory) |
| 10892 | Read/write | Integer | -100..100 | Return water temperature calibration value | -10..+10%, 10x, 1% => 10 (Write 0x99C4 to store to memory) |
Control panel (read-only)
10 registers
| Modbus register actual | Type | Access | Range | Description | Data values |
| 10899 | Read | Integer | 0..1 | AHU start/stop control | 1-Start, 0-Stop |
| 10900 | Read | Integer | 0..1 | Season (heating permitted or prohibited) | 1-Winter, 0-Summer (heater off) |
| 10901 | Read | Integer | 0..1 | Control mode (Auto/Manual) | 0-Manual (preset fan speed), 1-Auto (schedule) |
| 10902 | Read | Integer | 0..4 | Ventilation intensity level current | 0-Standby, 1-Low fan speed, 2-Normal fan speed, 3-High fan speed, 4-Override mode (OVR-register enabled or FC-wiring closed) |
| 10903 | Read | Integer | 100..400 | Supply set point temperature, C | 10 to 40C, 10x C, ex. 25.0C => 250 |
| 10904 | Read | Integer | -300..750 | Supply air temperature, C | -30 to 75C, 10x C, ex. 250 => 25.0C |
| 10905 | Read/write | 2x Char/Int8 | 0x0000..0x183B | Time, hhmm | Ex. 8:05 => 0x0805, 18:30 => 0x121E (18=0x12, 30=0x1E) |
| 10906 | Read | Binary | 0x0..0xF [b3-b0, 0..1] Ex. 0x01=>64=>00000001 b0=1, rotating heat exchanger |
System configuration/DIP switch status | b0-Heat exchange type (0-RECU/1-REGO), b1-Heater type (0-Electric/1-Water), b2-Fan type (0-AC/1-EC), b3-OVR-mode (0-All fans/1-Exhaust fan stop) (1-On, 0-Off) |
| 10907 | Read | Integer | 0..14 | Alarm status (warnings) | 14-Service, 13-Heater off, 11-Rotor stop |
| 10908 | Read | Integer | 0..28 | Alarm status (stop code) | 3-Rotor stop, 4-Heater overheating, 9-Supply sensor B1, 19-Air temp. low, 20-Air temp. high, 27-Water temp. low, 28-Frost possibility |
