Vaillant ecoTEC plus 612 Instructions For Installation And Servicing page 44

8 Troubleshooting
Second diagnostic level
• As described above in the first diagnostic level, scroll
through the diagnostic number d.97.
• Change the displayed value to 17 (password) and
press the "i" button.
You are now in the second diagnostic level where all
information from the first diagnostic level (see table
8.2) and the second diagnostic level (see table 8.3) is
displayed.
Display Meaning
d.17 Heating flow/return regulation changeover
d.18 Pump mode (return)
d.19 Only in ecoTEC plus:
Operating modes of the two-speed heating pump
d.20 Maximum set value for target cylinder temperature
(system boilers only)
d.27 Switching accessory relay 1 in the accessory module
d.28 Switching accessory relay 2 in the accessory module
d.50 Offset for minimum speed
d.51 Offset for maximum speed
d.58 From the third quarter of 2006:
Activation of solar reheating
d.60 Number of safety temperature limiter cut offs
d.61 Number of lock outs
d.64 Average ignition time
d.65 Maximum ignition time
d.68 Unsuccessful ignitions in the first attempt
d.69 Unsuccessful ignitions in the second attempt
d.70 Set diverter valve position
d.71 Maximum setting of heater control knob
d.72 Pump overrun time after warm start (combination boil-
ers only) or charging an electronically controlled hot
water storage through C1-C2 (system boilers only)
d.73 Offset for warm start target value (combination boilers
only)
d.75 Maximum charging time for a storage without own con-
troller (system boilers only)
d.77 Storage partial load (storage charging capacity limit,
system boilers only)
Table 8.3 Diagnostics codes of the second diagnostic level
44
Scrolling and changing values and exiting the diagnostic
mode is done as described in the first diagnostic level.
Note
After exiting the second diagnostic level, if you
press "i" and "+" within 4 minutes, you will
directly reach the second diagnostic level with-
out having to enter the password again.
Display value/adjustable value
0 = flow, 1 = return (factory setting: 0)
0 = return, 1 = nonstop, 2 = winter (factory setting: 0)
0 = pre ignition speed 1, hot water or heating speed 2, overrun speed
1
1 = pre ignition speed 1, hot water speed 2, heating speed 1, overrun
speed 1
2 = like 1, but speed in heating mode dependent on heating part load
d. 0 (if d.0 is below 60% of full load, then pump speed 1, other-
wise speed 2)
3 = always speed 2
(factory setting: 2)
Setting range: 50 to 70 °C (factory setting: 65 °C)
1 = Circulation pump (default)
2 = Ext. pump
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
1 = Circulation pump
2 = Ext. pump (default)
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
in rpm/10, adjustment range: 0 to 300
in rpm/10, adjustment range: -99 to 0
Setting range: 0 to 3
0 = solar reheating disabled (factory setting)
3 = activation of min. hot water target value = 60 °C for solar
reheating
Quantity
Number of unsuccessful ignitions in the last attempt
in seconds
in seconds
Quantity
Quantity
0 = Normal mode (factory setting)
1 = Centre position
2 = permanent heating position
Adjustment range in °C: 40 to 85 (Factory setting: 75)
Adjustment range in sec: 0, 10, 20 to 600
Factory setting for combination boilers: 80
Factory setting for system boilers: 300
Adjustment range: -15 K to +5 K (Factory setting: 0 K)
Adjustment range in min: 20, 21, 22 to 90 (Factory setting: 45)
Adjustment range in kW: appliance-specific
Factory setting: max. output
Instructions for installation and servicing ecoTEC / 839592_09