Vaillant ecoMAX 665 Installation And Maintenance Manual - page 32
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Installation and maintenance manual ecoMAX 665
8.1.2 Diagnosis codes
In the diagnosis mode, you can change certain parame-
ters or display more information (see following table).
• Press the “i” and “+” keys under the display simulta-
neously.
The display shows “d.0”.
• Scroll to the desired diagnosis number with the “+” or
“-” buttons.
• Press the “i” key.
The display shows the relevant diagnosis information.
• If necessary, use the “+” or “–” keys to change the
value (display flashes).
• Save the new value by holding down the “i” key for
approx. 5 seconds until the display no longer flashes.
You can end the diagnosis mode as follows:
• Press the “i” and “+” keys simultaneously
or
• do not press any key for about 4 minutes. The current
heating flow temperature appears in the display again.
8 Troubleshooting
Code
Meaning
Display value/adjustable value
d.0
Partial-load heating
adjustable values in kW
d.1
Pump run-out heating
1 - 60 minutes or “continuous” (factory setting: 5 minutes)
d.2
Max. lockout time heating
1 - 60 minutes (factory setting: 20 minutes)
d.4
Cylinder temperature actual value
actual value in °C; with use of solar energy:
actual value of the upper cylinder temperature sensor
d.5
Supply temperature target value
target value in °C
d.6
Cylinder temperature target value
target value in °C
d.7
Cylinder temperature target value for VC appliances
target value in °C
d.8
Terminal 3-4
0 = room thermostat open (no heating operation)
1 = room thermostat closed (heating operation)
d.9
Terminal 7-8-9 target value
in °C (continuous controller)
d.10
Internal pump
1 = on; 0 = off
d.11
External pump
1 = on; 0 = off
d.12
Storage charging pump
1 = on; 0 = off
d.13
Circulation pump
1 = on; 0 = off
d.14
Pump speed target value
target value internal pump in %. possible settings:factory set-
ting auto, 53, 60, 70, 85, 100 %)
d.15
Pump speed actual value
actual value internal pump in %
d.16
2. Pump
3 = storage charging pump (only this function can be used)
for other functions, use module 1 of 5 (item no. 306 253) or
module 2 of 6 (item no. 306 247)
d.17
Control type
0 = supply temperature control;
1 = return temperature control
d.22
Hot water request
1 = on; 0 = off
d.23
Operating mode
summer/winter mode: 1 = on; 0 = off
d.25
Hot water enabling via warm restart clock
1 = yes; 0 = no
d.33
Fan target value
target value in r.p.m./10
d.34
Fan actual value
actual value in r.p.m./10
d.40
Supply temperature actual value
actual value in °C
d.41
Return temperature actual value
actual value in °C
d.44
Ionisation current actual value
actual value/100 in A
d.46
External temperature correction value
correction value in K