Flags (2 Bytes) : Flags to Indicate which fields are active
0x01 0x00 : Set System Power Power
0x02 0x00 : Unknown (Byte 4) - Operation Mode?
0x04 0x00 : Set Hot Water Mode
0x08 0x00 : Set Heating Control Mode Zone 1
0x10 0x00 : Set Heating Control Mode Zone 2
0x20 0x00 : Set Hotwater Setpoint
0x40 0x00 : Not Required (uint16)
0x80 0x00 : Set Zone 1 Setpoints
0x00 0x01 : Not Required (uint16)
0x00 0x02 : Set Zone 2 Setpoints
0x00 0x04 : Not Required (uint16)
0x00 0x08 : Unknown (Byte 14)
0x00 0x10 : Unknown (Byte 15)
P : System Power
0x00 : Standby
0x01 : Power On
DHW : Hot Water Mode
0x00 : Normal
0x01 : Eco
HC1 / HC2 : Heating Control Mode Zone 1 / 2
0 : Heating Temperature Mode
1 : Heating Flow Control Mode
2 : Heating Compensation Curve Mode
3 : Cooling Temperature Mode
4 : Cooling Flow Control Mode
5 : Dry Up
DHWSP : Hot Water Setpoint (Temperature * 100)
Z1SP : Zone 1 Setpoint (* 100)
Z2SP : Zone 2 Setpoint (* 100) + Flag 0x00
Unk : Unknown (Sets 0x26 Byte 14)
0x34 - Hot Water and Holiday Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0x34
Flags
Flags
DHW
HOL
IDHW
Z1HI
Z1CI
Z2HI
CZ2I
SCM
Unk1
Unk2
Unk3
Unk4
Unk5
CHK
Flags (2 Bytes) : Flags to Indicate which fields are active
0x01 0x00 : Hot Water Force (Boost)
0x02 0x00 : Holiday Mode
0x04 0x00 : DHW Inhibit (Only When in "Server Control Mode")
0x08 0x00 : Heating Z1 Inhibit (Only When in "Server Control Mode")
0x10 0x00 : Cooling Z1 Inhibit (Only When in "Server Control Mode")
0x20 0x00 : Heating Z2 Inhibit (Only When in "Server Control Mode")
0x40 0x00 : Cooling Z2 Inhibit (Only When in "Server Control Mode")
0x80 0x00 : Server Control Mode
0x00 0x01 : Unknown 1 (Byte 11)
0x00 0x02 : Unknown 2 (Byte 12)
0x00 0x04 : Unknown 3 (Byte 13)
0x00 0x08 : Unknown 4 (Byte 14)
0x00 0x10 : Unknown 5 (Byte 15)
DHW : On (1) / Off (0)
HOL : On (1) / Off (0)
SCM : Server Control Mode On (1) / Off (0)
IDHW : Inhibit DHW On (1) / Off (0)
Unk1 : Unknown (Sets 0x28 Byte 11)
Unk2 : Unknown (Sets 0x28 Byte 12 - suspected)
Unk3 : Unknown (Sets 0x28 Byte 13 - suspected)
Unk4 : Unknown (Sets 0x28 Byte 14 - suspected)
Unk5 : Unknown (Sets 0x28 Byte 15 - suspected)
0x35 - Set Thermostat Setpoints
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0x35
Flags
Flags
CH
Z1SP
Z1SP
Z2SP
Z2SP
CHK
Flags (2 Bytes) : Flags to Indicate which fields are active
0x01 0x00 : Cooling/Heating
0x02 0x00 : Zone 1 Setpoint
0x04 0x00 : Not Required (uint16)
0x08 0x00 : Zone 2 Setpoint *
0x10 0x00 : Not Required (uint16)
0x20 0x00 : Unknown (Byte 8)
0x40 0x00 : Unknown (Byte 9)
0x80 0x00 : Unknown (Byte 10)
0x00 0x01 : Unknown (Byte 11)
0x00 0x02 : Unknown (Byte 12)
0x00 0x04 : Unknown (Byte 13)
0x00 0x08 : Unknown (Byte 14)
0x00 0x10 : Unknown (Byte 15)
CH : Cooling (1) /Heating (0)
Z1SP : Zone 1 Setpoint (* 100)
Z2SP : Zone 2 Setpoint (* 100)
0xC9 - FTC Information
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0xC9
0x5F
0x5F: Request
Get Request - Packet Type 0x42
Available Commands
Active commands so far identified, 0x00 to 0xff. Commands not listed appear to generate no resaponse. Some command listed have empty, payload 0x00, response.
Command
Brief Description
0x01
Time & Date
0x02
Defrost
0x03
Refrigerant and Zone Running Information
0x04
Compressor Frequency
0x05
Hot Water Boot Flag
0x06
Unknown - Empty Response
0x07
Output Power
0x08
Unknown
0x09
Zone 1 & 2 Temperatures and Setpoints, Hot Water Setpoint
0x0b
Zone 1 & 2 and Outside
0x0c
Water Flow Temperatures
0x0d
Boiler Flow Temperatures
0x0e
Unknown
0x10
Unknown
0x11
Unknown
0x13
Run Hours
0x14
Primary Flow Rate
0x15
Unknown Flags
0x16
Running Pumps
0x17
Unknown - Empty Response
0x18
Unknown - Empty Response
0x19
Unknown - Empty Response
0x1a
Unknown - Empty Response
0x1c
Unknown - Empty Response
0x1d
Unknown - Empty Response
0x1e
Unknown - Empty Response
0x1f
Unknown - Empty Response
0x20
Unknown - Empty Response
0x26
Various Operantion Mode Flags
0x27
Unknown
0x28
Various Operantion Mode Flags
0x29
Zone 1 & 2 Temperatures
0xa1
Unknown
0xa2
Unknown
0xa3
Unknown - Empty Response
Payload - All Commands
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Command
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Set Response - Packet Type 0x61
Available Commands
Active commands so far identified.
Command
Brief Description
0x00
OK
0x00 - OK , Command OK, or Just Format?
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Command
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Get Response - Packet Type 0x62
Resposes
Responses so far identified.
Command
Brief Description
0x01
Time & Date
0x05
Various Flags
0x09
Zone 1 & 2 Temperatures and Setpoints, Hot Water Setpoint
0x0b
Zone 1 & 2 and Outside Temperature
0x0c
Water Flow Temperatures
0x0d
Boiler Flow Temperatures
0x26
Various Operantion Mode Flags
0x28
Various Operantion Mode Flags
0x29
Zone 1 & 2 Temperatures
0x01 - Time & Date
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0x01
Y
M
D
h
m
s
Y: Year
M: Month
D: Day
h: Hour
m: Minute
s: Second
0x02 - Defrost
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0x02
D
D: Defrost
0x03 - Refrigerant and Zone Running Information
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0x03
RF
F1
F2
F3
F4
M
S
RF: Refrigerant Flt Code
F1: Fault Code * 100 + Flt Code (F2) (Numbers)
F3: Fault Code (Letter) 1
F4: Fault Code (Letter) 2
M: Multi Zone Running Parameter (3 = Z2 Working, 2 = Z1 Working, 1 = Both Zones working, 0 = Idle)