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OptionalPCB.md

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Optional PCB:

Optional PCB is also connected to HP via the CN-CNT ( in case using it and CZ-TAW1 ,Optional PCB is conected to HP , and on Optional PCB there is another CN-CNT to connect CZ-TAW1). In this way Optional PCB comunicate with HP in similar way to CZ-TAW1 - Next to(between) standard Magic Packets there specific commands from Optional PCB to HP ,and next to (beetwen) answers from HP there is a answer/confirmation to Optional PCB.

Set command byte decrypt:

Byte# Possible Value Value decrypt Value Description
00 F1 Header
01 11 Data length ( Packet length = Data length + 3 ) Header
02 01 Header
03 50 Header
04 00 0 byte
05 00 0 byte
06 40 HEX: 40 - SG Mode 0,0 (Normal) , 60 - SG Mode 1,0 ( HP and DHW off) ,50 - SG Mode 0,1(Capacity 1) ,70 - SG Mode 1,1(Capacity 2) ,00 - Compressor external SW on SG ready values , External Compressor SW
07 FF NTC 6,5kOhm resistance characteristic value Temp. Pool
08 FF NTC 6,5kOhm resistance characteristic value Temp. Buffer
09 E5 ?
10 FF NTC 6,5kOhm resistance characteristic value Temp. Z1_Room
11 FF NTC 6,5kOhm resistance characteristic value Temp. Z2_Room
12 00 0 byte
13 FF NTC 6,5kOhm resistance characteristic value Temp. Solar
14 EA HEX: EB-100% ,B8 - 75% ,85 -50%,52 - 25% ,2B - 5% (proportional values should works) Demand Control
15 FF NTC 6,5kOhm resistance characteristic value Temp. Z2_Water
16 FF NTC 6,5kOhm resistance characteristic value Temp. Z1_Water
17 00 0 byte
18 00 0 byte
19 2C CHECKSUM

NTC 6,5kOhm characteristic:

Values are direct measurement of NTC thermistor conected to Optional PCB. It can be aproximate by function : ?????

Exact values table

HEX Val. Temp [C] HEX Val. Temp [C] Hex Val. Temp [C] Hex Val. Temp [C]
00 120 40 53 80 24 C0 0
01 120 41 53 81 24 C1 0
02 120 42 52 82 24 C2 -1
03 120 43 51 83 23 C3 -1
04 120 44 51 84 23 C4 -2
05 120 45 50 85 22 C5 -2
06 120 46 50 86 22 C6 -3
07 120 47 49 87 22 C7 -3
08 120 48 49 88 21 C8 -4
09 120 49 48 89 21 C9 -4
0A 120 4A 48 8A 21 CA -4
0B 120 4B 47 8B 20 CB -5
0C 117 4C 47 8C 20 CC -5
0D 114 4D 46 8D 19 CD -6
0E 111 4E 45 8E 19 CE -6
0F 108 4F 45 8F 19 CF -7
10 106 50 44 90 18 D0 -7
11 103 51 44 91 18 D1 -8
12 101 52 44 92 18 D2 -8
13 99 53 43 93 17 D3 -9
14 97 54 43 94 17 D4 -9
15 95 55 42 95 17 D5 -10
16 93 56 42 96 16 D6 -10
17 92 57 41 97 16 D7 -11
18 90 58 41 98 15 D8 -12
19 88 59 40 99 15 D9 -12
1A 87 5A 40 9A 15 DA -13
1B 86 5B 39 9B 14 DB -13
1C 84 5C 39 9C 14 DC -14
1D 83 5D 38 9D 14 DD -15
1E 82 5E 38 9E 13 DE -15
1F 80 5F 38 9F 13 DF -16
20 79 60 37 A0 12 E0 -16
21 78 61 37 A1 12 E1 -17
22 77 62 36 A2 12 E2 -18
23 76 63 36 A3 11 E3 -18
24 75 64 35 A4 11 E4 -19
25 74 65 35 A5 11 E5 -20
26 73 66 35 A6 10 E6 -21
27 72 67 34 A7 10 E7 -21
28 71 68 34 A8 9 E8 -22
29 70 69 33 A9 9 E9 -23
2A 69 6A 33 AA 9 EA -24
2B 68 6B 32 AB 8 EB -25
2C 67 6C 32 AC 8 EC -26
2D 66 6D 32 AD 8 ED -27
2E 66 6E 31 AE 7 EE -28
2F 65 6F 31 AF 7 EF -29
30 64 70 30 B0 6 E0 -30
31 63 71 30 B1 6 F1 -31
32 62 72 30 B2 6 F2 -32
33 62 73 29 B3 5 F3 -33
34 61 74 29 B4 5 F4 -35
35 60 75 28 B5 4 F5 -36
36 60 76 28 B6 4 F6 -38
37 59 77 28 B7 4 F7 -40
38 58 78 27 B8 3 F8 -41
39 58 79 27 B9 3 F9 -44
3A 57 7A 27 BA 2 FA -46
3B 56 7B 26 BB 2 FB -49
3C 56 7C 26 BC 2 FC -53
3D 55 7D 25 BD 1 FD -57
3E 54 7E 25 BE 1 FE -64
3F 54 7F 25 BF 0 FF -78

Answer/confirmation from HP to Optional PCB is always the same:

71 11 01 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2D

To do:

  • Heat/Cool Switch

  • Optional Thermostat 1 &2 ( Cool / Heat)