Looking at the log I quite often have an "Error 03", about 4000 occurances a day. And quite often "Error 04", about 1500 occurances a day.
Some log sections where the error occurs:
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15:50:28.690618 B700E0000 Unk-DataId Maximum relative modulation level: 0.00
15:50:29.601674 T00090000 Read-Data Remote override room setpoint: 0.00
15:50:29.701648 BF0090000 Unk-DataId Remote override room setpoint: 0.00
15:50:29.723600 AC0090000 Read-Ack Remote override room setpoint: 0.00
15:50:30.614019 T00000300 Read-Data Status: 00000011 00000000
15:50:31.623679 T00000300 Read-Data Status: 00000011 00000000
15:50:32.583157 T00000300 Read-Data Status: 00000011 00000000
15:50:32.685653 B40000302 Read-Ack Status: 00000011 00000010
15:50:33.596312 T80190000 Read-Data Boiler water temperature: 0.00
15:50:34.603095 T80190000 Read-Data Boiler water temperature: 0.00
15:50:34.716807 Error 03
15:50:35.611118 T80190000 Read-Data Boiler water temperature: 0.00
15:50:36.615828 T80190000 Read-Data Boiler water temperature: 0.00
15:50:36.715894 B40191B00 Read-Ack Boiler water temperature: 27.00
15:50:37.583778 T10011D00 Write-Data Control setpoint: 29.00
15:50:37.684054 BD0011D00 Write-Ack Control setpoint: 29.00
15:50:38.594628 T80640000 Read-Data Remote override function: 00000000
15:50:38.695821 B70640000 Unk-DataId Remote override function: 00000000
15:50:38.707029 A40640000 Read-Ack Remote override function: 00000000
15:50:39.611056 T00110000 Read-Data Relative modulation level: 0.00
15:50:39.708269 BC0110000 Read-Ack Relative modulation level: 0.00
15:50:40.587091 T00000300 Read-Data Status: 00000011 00000000
15:50:40.685078 B40000302 Read-Ack Status: 00000011 00000010
15:50:41.606394 T80190000 Read-Data Boiler water temperature: 0.00
15:50:41.710929 Error 03
15:50:42.605348 T80190000 Read-Data Boiler water temperature: 0.00
15:50:42.704831 B40191B00 Read-Ack Boiler water temperature: 27.00
15:50:43.618148 T10011E00 Write-Data Control setpoint: 30.00
15:50:43.716932 BD0011E00 Write-Ack Control setpoint: 30.00
15:50:44.587777 T00110000 Read-Data Relative modulation level: 0.00
15:50:45.600471 T80190000 Read-Data Boiler water temperature: 0.00
15:50:45.699373 B40191B00 Read-Ack Boiler water temperature: 27.00
15:50:46.603722 T10011E00 Write-Data Control setpoint: 30.00
15:50:46.705593 BD0011E00 Write-Ack Control setpoint: 30.00
15:50:47.616903 T00110000 Read-Data Relative modulation level: 0.00
15:50:47.716120 B40112C00 Read-Ack Relative modulation level: 44.00
15:50:48.584664 T901811C9 Write-Data Room temperature: 17.79
15:50:48.684929 BF0180000 Unk-DataId Room temperature: 0.00
15:50:49.597640 T10101200 Write-Data Room setpoint: 18.00
15:50:50.609892 T00000300 Read-Data Status: 00000011 00000000
15:50:50.704334 BC000030A Read-Ack Status: 00000011 00001010
15:50:51.617895 T80190000 Read-Data Boiler water temperature: 0.00
15:50:51.717684 B40191B00 Read-Ack Boiler water temperature: 27.00
15:50:52.586020 T10011E00 Write-Data Control setpoint: 30.00
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15:49:59.619750 T801A0000 Read-Data DHW temperature: 0.00
15:49:59.717950 BC01A1A00 Read-Ack DHW temperature: 26.00
15:50:00.594371 T00000300 Read-Data Status: 00000011 00000000
15:50:00.692259 B40000302 Read-Ack Status: 00000011 00000010
15:50:01.605737 T80190000 Read-Data Boiler water temperature: 0.00
15:50:01.704393 BC0191F00 Read-Ack Boiler water temperature: 31.00
15:50:02.627013 T90011C00 Write-Data Control setpoint: 28.00
15:50:02.729051 Error 03
15:50:03.625151 T90011C00 Write-Data Control setpoint: 28.00
15:50:03.723605 B50011C00 Write-Ack Control setpoint: 28.00
15:50:05.200527 T00110000 Read-Data Relative modulation level: 0.00
15:50:05.202100 BC0110000 Read-Ack Relative modulation level: 0.00
15:50:05.602025 T80190000 Read-Data Boiler water temperature: 0.00
15:50:05.701954 B40191E00 Read-Ack Boiler water temperature: 30.00
15:50:06.614937 T90011C00 Write-Data Control setpoint: 28.00
15:50:06.716033 B50011C00 Write-Ack Control setpoint: 28.00
15:50:07.631132 T001B0000 Read-Data Outside temperature: 0.00
15:50:07.727048 B401BE0FF Read-Ack Outside temperature: -31.00
15:50:08.595819 T000F0000 Read-Data Boiler capacity and modulation limits: 0 0
15:50:08.694676 BF00F0000 Unk-DataId Boiler capacity and modulation limits: 0 0
15:50:09.609824 T00120000 Read-Data CH water pressure: 0.00
15:50:09.719906 Error 04
15:50:09.730171 EC0120C01
15:50:10.620794 T00000300 Read-Data Status: 00000011 00000000
15:50:11.582031 T00000300 Read-Data Status: 00000011 00000000
15:50:11.681706 B40000302 Read-Ack Status: 00000011 00000010
15:50:12.598389 T80190000 Read-Data Boiler water temperature: 0.00
15:50:12.694672 B40191D00 Read-Ack Boiler water temperature: 29.00
15:50:13.607095 T10011D00 Write-Data Control setpoint: 29.00
15:50:13.707469 BD0011D00 Write-Ack Control setpoint: 29.00
15:50:14.619057 T80380000 Read-Data DHW setpoint: 0.00
15:50:14.720370 BE0383F00 Data-Inv DHW setpoint: 63.00
15:50:15.591085 T80190000 Read-Data Boiler water temperature: 0.00
15:50:15.687087 B40191D00 Read-Ack Boiler water temperature: 29.00
15:50:16.598994 T10011D00 Write-Data Control setpoint: 29.00
15:50:16.698228 BD0011D00 Write-Ack Control setpoint: 29.00
15:50:17.610172 T00390000 Read-Data Max CH water setpoint: 0.00
15:50:18.618218 T00390000 Read-Data Max CH water setpoint: 0.00
15:50:18.718795 B40395700 Read-Ack Max CH water setpoint: 87.00
15:50:19.585726 T900E6400 Write-Data Maximum relative modulation level: 100.00
15:50:19.695692 Error 04
15:50:19.708405 E700E0001
15:50:20.602424 T00000300 Read-Data Status: 00000011 00000000
15:50:20.712957 Error 03
15:50:21.608542 T00000300 Read-Data Status: 00000011 00000000
15:50:21.708581 B40000302 Read-Ack Status: 00000011 00000010
15:50:22.624226 T80190000 Read-Data Boiler water temperature: 0.00
15:50:22.731255 Error 03
15:50:23.585633 T80190000 Read-Data Boiler water temperature: 0.00
15:50:23.693606 Error 03
15:50:24.588445 T80190000 Read-Data Boiler water temperature: 0.00
15:50:24.689872 BC0191C00 Read-Ack Boiler water temperature: 28.00
15:50:25.602073 T80190000 Read-Data Boiler water temperature: 0.00
15:50:25.701715 BC0191C00 Read-Ack Boiler water temperature: 28.00
Possibly related to the above erorrs, when I set the Opentherm gateway to "Gateway mode" the time on the thermostat is reset to 0:00 on random moments. Approximately once a day on average.
- Are the errors related to the boiler communucation or the thermostat communication? How can I find out which of the two interfaces is causing issues?
- Is it normal that Error 03 and Error 04 occur some times?
- What could be causing the time reset of the thermostat? I'm now testing in "Monitor mode" and haven't had a time reset since a day.
Also, I get strange values from the boiler some times. The 125.00 degrees boiler temp is definitely a glitch.
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16:03:10.688415 BC0110000 Read-Ack Relative modulation level: 0.00
16:03:11.582799 T80190000 Read-Data Boiler water temperature: 0.00
16:03:11.685210 B40197D00 Read-Ack Boiler water temperature: 125.00
16:03:12.613101 T10010A00 Write-Data Control setpoint: 10.00
16:03:12.713195 BD0010A00 Write-Ack Control setpoint: 10.00