Technical data

Fault finding 10
Instructions for installation and servicing aquaPLUS VUI 362-7 39
10.4 Diagnostic Modes
In order to assist with the pinpointing of a particular
fault it is possible to use the boiler display in a
diagnostic mode to interrogate the boiler about the
status of certain components.
• Press the "i" and "+" buttons below the display
simultaneously. The display will now show "d.00".
• Use "+" or "-" buttons to scroll up or down to the
desired diagnosic number.
• Press "i" button to display the corresponding
diagnosic information.
• If necessary, you can now alter the value by pressing
"+" or "-" buttons. (When altering values display will
flash). Press and hold the "i" button to save the value
to memory, when the value is saved the display will
stop flashing.
Diagnosic mode is cancelled as follows:
• Press the "i" and "+" buttons simultaneously
or
• Do not press any key for approximately four minutes.
The display will now revert back to showing the
current flow temperature.
Table 10.2: Diagnostic modes 1 of 2
Display Indication Displayed values/adjustment values
d.00 Part load setting 0....30
d.01 Water pump over run 1, 2, 3, ....60 min (factory-adjusted to 5 min)
d.02 Maximum burner anti cycling period at 20 °C 8 - 60 min (factory-adjusted to 15 min)
flow temperature
d.03 Actual hot water temperature in °C
d.04 Actual tank temperature in °C
d.05 Flow temperature setting in °C
d.06 Target value for hot water temperature in °C
d.08 External controls heat demand 0 = open, no demand, 1 = closed, demand
d.10 Pump status 1 = on, 0 = off
d.11 External pump status 1 = on, 0 = off
d.12 DHW pump - status 100 = on, 0 = off
d.13 DHW circulation pump (external) 1 = on, 0 = off
d.21 Flame rectification 1 = on, 0 = off
d.22 Domestic hot water demand 1 = on, 0 = off
d.23 Summer/winter function (control knob) 1 = winter, 0 = summer
d.24 Air pressure switch 1 = on, 0 = off
d.25 Storage tank status 1 = on, 0 = off
d.30 Gas valve status 1 = on, 0 = off
d.33 Required value of the rotary speed of the fan r.p.m.
d.34 Actual value of the rotary speed of the fan r.p.m.
d.35 Diverter valve position 0 = heating, 1 = hot water
d.37 Modulator current in mA
d.40 Actual flow temperature in °C
d.41 Actual return temperature in °C
d.50 Maximum flow temperature in °C
d.60 Number over heat cut off operations
d.61 Number of lock outs
d.64 Average ignition time in s
834702_33GB_012005.qxd 09.03.2005 16:26 Uhr Seite 39