Wellea Monobloc
43
2.4
Check Buttons
Main PCB for hydronic system SW4 system check button
2.4.1
Button SW4 is used to check the parameters of the hydronic system. Refer to Table 4-2.1 First, press Button SW4 for 3
seconds and the first parameter (operating mode) will be displayed. Then, on each subsequent press, the next parameter
is displayed.
Table 4-2.9:
SW4 system check
Number Parameters displayed on digital display
Remarks
1
Operating mode
0: off; 2: cooling; 3: heating; 5: DHW.
2
Output requirement before correction (kW)
Actual value = value displayed
3
Corrected output requirement (kW)
Actual value = value displayed
4
Wellea
Mono leaving water temperature (°C)
Actual value = value displayed
5
Auxiliary heating source leaving water temperature (°C)
Actual value = value displayed
6
Target leaving water temperature calculated from climate-related curves (°C)
Actual value = value displayed
7
Room temperature (°C)
Actual value = value displayed
8
DHW tank temperature (°C)
Actual value = value displayed
9
Heating mode: Water side heat exchanger refrigerant inlet temperature (°C)
Cooling mode: Water side heat exchanger refrigerant outlet temperature (°C)
Actual value = value displayed
10
Heating mode: Water side heat exchanger refrigerant outlet temperature (°C)
Cooling mode: Water side heat exchanger refrigerant inlet temperature (°C)
Actual value = value displayed
11
Water side heat exchanger water outlet temperature (°C)
Actual value = value displayed
12
Water side heat exchanger water inlet temperature (°C)
Actual value = value displayed
13
Outdoor ambient temperature (°C)
When no decimal point is displayed:
Temperature is ≥ -9°C
Actual value = value displayed
When decimal point is displayed between
the two digits:
Temperature is ≤ -10°C
Actual value = value displayed x -10
Example: “1.2” indicates -12°C
14
Backup electric heater first element current (A)
Actual value = value displayed
15
Backup electric heater second element current (A)
Actual value = value displayed
16
Most recent code
“--” is displayed if no error or protection events
have occurred since start-up
17
Error or protection code previous to most recent code
“--” is displayed if no error or protection events
have occurred since start-up
18
Error or protection code previous to 17
“--” is displayed if no error or protection events
have occurred since start-up
19
Hydronic system main PCB software version
20
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