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Information about the TEC QRS11 heat pump and it's modbus connection. Not all values are know yet. USE AT YOUR OWN RISK.
Wordlist
Some words are shortend to make it easer to read, here is the list of word
Domestic Hot Water (DHW)
ESPHome
There is a (partial) ESPHome config available. You can use esphome.yml as the starting point for your own firmware. Here, most of the available information has already been converted to entities with the correct metadata.
RS-485 (modbus)
Type
Value
Baudrate
9600
Databits
8
Stopbits
2
Parity
even
Discrete output (coil / read-write)
Address
Parameter
Value
1
DI4
AC Switch
2
DI5
DHW Switch
3
TR12
SG Function
Discrete input (read-only)
Address
Parameter
Value
1
AL01
Alarm: Low pressure
2
AL02
Alarm: High pressure
3
AL03
Alarm: Low outlet water temperature (ST < AR01)
5
AL05
Alarm: High outlet water temperature (ST > AR03)
6
AL17
Alarm: Water flow is short
7
AL18
Alarm: Low pressure alarms times within 24 hours is over the limit
8
AL19
Alarm: High pressure alarms times within 24 is over the limit
9
AL20
10
AL21
11
AL24
13
AL37
14
AL38
15
AL71
16
AL72
17
AL73
18
AL74
19
AL75
20
AL76
23
AL78
25
Secondary Pump
27
Primary Pump
32
NO4
AC Heater
33
D07
Crankshaft heater
34
NO1
DHW Circulation Pump
36
NO8
DHW Heater
39
NO6
Gas boiler
Input register (read-only)
Address
Parameter
Value
unit
1
B1
Inlet Temperature
0.1°C
2
B2
Outlet Temperature
0.1°C
3
T2
Ambient Temperature
0.1°C
4
T4
Suction
0.1°C
5
T3
Discharge
0.1°C
6
B6
Low Pressure Side
0.1 bar
7
B7
High Pressure Side
0.1 bar
8
Flow
0.1 m3/h
9
Room Temperature
0.1°C
13
Compressor
1 Hz
14
Y3
Indoor pump PWM
0.1%
17
B4
Hot Water
0.1°C
18
Operating Hours
1 Hour
20
Unit State
unit_state
Holding Register (read-write)
Address
Parameter
Value
default
min
max
unit
Access
9
Room Temperature
0.1°C
61
ST01
Temperature on cooling mode
13
ST11
ST12
0.1°C
User
62
ST02
Temperature on heating mode
35
ST13
ST14
0.1°C
User
63
ST03
Temperature difference on cooling mode
1
1
10
0.1°C
User
64
ST04
Temperature difference on heating mode
1
1
10
0.1°C
User
65
ST06
Compensation factor for heating curve
0.6
0
3
0.1
User
66
ST07
Ambient temperature condition for starting aux heat
0
-10
20
0.1°C
User
67
ST08
Compensation factor for cooling curve
0.6
0
3
0.1
User
68
ST11
Minimum settable cooling temperature
12
0
ST12
0.1°C
Manufacturer
69
ST12
Maximum settable cooling temperature
40
ST11
60
0.1°C
Manufacturer
70
ST13
Minimum settable heating temperature
20
0
ST14
0.1°C
Manufacturer
71
ST14
Maximum settable heating temperature
50
ST13
8
0.1°C
Manufacturer
72
ST15
Minimum settable DHW temperature
20
0
ST16
0.1°C
Manufacturer
73
ST16
Maximum settable DHW temperature
65
ST15
80
0.1°C
Manufacturer
74
ST17
SG Function: Cooling/heating water temperature decrement/increment