Vaillant ecoCRAFT VKK GB SERIES Installation And Maintenance Instructions Manual - page 37
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Installation and maintenance instructions ecoCRAFT - 0020055744_03
9.2 Diagnostic
mode
In the diagnostic mode various parameters can be read
off to allow display of the operating conditions and for
fault diagnosis.
• Press the "i" and "+" buttons simultaneously to call
up the diagnostic mode.
• Select the desired diagnostic point with the "+"
and "–" buttons.
• Press the "i" button to display the relevant value.
Display
Meaning
Setting range and default setting for settable parameters
d. 0
Heating partial load, settable values in kW
Default setting: max. output
d. 1
Water pump overrun time for heating mode
Setting range: 2,3…60 min; Default setting: 5 mins
d. 2
Maximum burner block time at 20 °C
Setting range: 2..60 min ; Default setting: 20 min
d. 4
Measurement of cylinder temperature [°C]
d. 5
Target value for flow/return temperature [°C]
Current target value, determined from potentiometer, controller,
control type….
d. 7
Cylinder target temperature
(15°C on left, after that 40 °C to d.20 (max. 70 °C)
d. 8
Room thermostat at terminal 3-4
Displayed value: 0 = opened, no heating mode; 1 = closed, heating
mode
d. 9
Flow target temperature [°C] from external
analogue regulator to terminal 7-8-9/eBus
Minimum of ext. eBus target value and terminal 7 target value
d.10
Internal water pump
1 = on, 0 = off
d.11
External water pump
1 - 100 = on, 0 = off
d.12
Cylinder charging pump
1 - 100 = on, 0 = off
d.13
Circulation pump:
1 - 100 = on, 0 = off
d.14
Setting for speed-controlled internal pump
Setting range: 0=auto, 20 .. 100 % fixed setting; Default setting: 0
d.15
Current output of speed-controlled pump in %
d.17
Control type
0 = flow regulation, 1 = return regulation;
Default setting: 0
d.18
Pump operating mode (overrun)
0 = overrun (comfort); 1 = continuing (eco);
Default setting: 0
d.20
Maximum setting value of cylinder target temp.
potentiometer
Setting range: 50 °C-70 °C;
Default setting: 65 °C
d.22
External cylinder charging, terminal C1-C2
1 = on, 0 = off
d.23
Summer/winter function: 1 = Winter, 0 = Summer
d.24
Fan monitor
0 = contact open, 1 = contact closed
d.25
Recharging/warm start enabled by warm start
clock regulator/timer: 1 = yes, 0 = no
Default: enabled
d.27
Switching of accessory relay 1 for the VR40
accessory
1 = circulation pump (default);
2 = ext. pump;
3 = cylinder charging pump
4 = flue non-return valve/extractor hood;
5 = external gas valve;
6 = external error message;
d.28
Switching of accessory relay 2 for the VR40
accessory
1 = circulation pump
2 = ext. pump (default);
3 = cylinder charging pump
4 = flue non-return valve/extractor hood;
5 = external gas valve;
6 = external error message;
d.30
Control signal for gas valves
0=off; 1=on
d.33
Target speed for fan [rpm x 10]
Table 9.2 Diagnostic values (cont'd. on next page)
Troubleshooting 9