Vailant ecoTEC plus 937 Installation And Maintenance Instructions Manual Download

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06

Display

Meaning

Displayed value/settable value

d.72

Pump overrun time after warm start or shift load storage
tank charging

Setting range in seconds: 0, 10, 20 to 600
Factory setting: 80

d.73

Offset for warm start target temperature

Setting range: -15 K to +5 K (Factory setting: 0K)

d.74

Legionella protection shift load storage tank

Setting range:
0 = deactivated
1 = activated (Factory setting)

d.75

Maximum charging duration for an external cylinder with-
out its own control (system boilers only)

Adjustment range in min: 20, 21, 22 to 90 (Factory setting: 45)

d.77

Part load of the external cylinder (limit for charging
capacity of the external cylinder, system boilers only)

Adjustment range in kW: appliance specific
Factory setting: max. output

d.78

Limit for charging temperature of the external cylinder
(target flow temperature in storage tank mode, system
boilers only)

Adjustment range in °C 55 to 85 (Factory setting: 80)

d.80

Operating hours heating

in h

d.81

Operating hours hot water generation

in h

d.82

Operating cycles in heating mode

number/100

(3 equals 300)

d.83

Cycles in hot water operation

number/100

(3 equals 300)

d.84

Maintenance indicator: Number of hours until the next
maintenance

Setting range: 0 to 3000h and „-“ for deactivated
Factory setting: „-“ (300 corresponds to 3000h)

d.88

switching on threshold for recognizing water tapping
(only VCW)

0 = 1,5 l/min and no delay,
1 = 3,7 l/min and 2s delay

d.92

Module recognition shift load storage tank

Setting range:
0 = not recognised
1 = no communication via PE-BUS; Module recognised earlier
2 = Communication OK
Setting = 0: Unregister shift load storage tank from combi boiler
(if shift load storage tank is to be de-installed, set d.92 = 0)

d.93

DSN appliance variant setting

Setting range: 0 to 99

d.96

Factory reset

1 = Resetting adjustable parameters to factory setting

In the diagnostic codes 80 to 83 5 digit figure values are stored. When selecting e.g. d.80 only the first two digits of the figure value

are displayed (e.g.10). By pressing the „i“ key, the display switches over to the last three figures (e.g. 947). The operating hours coun-
ter of the heating in this case would be 10947 h. Pressing the „i“ again causes the display to switch back to the diagnosis point that
was called up.

Table 9.3 Diagnosis codes of the second diagnosis level (con-

tinued)

9.1.3 Error codes

Fault codes take priority over all other display functions
in the event of a system fault occurring.
If many errors occur simultaneously, the relevant error
codes are displayed alternately for approx. 2 seconds
each.

9.1.4 Fault

memory

The fault memory of the unit stores the information
concerning the last ten errors.

Press the "

“ and „

“ buttons simultaneously.

Scroll backwards with button "

“ through the list of

stored errors.

You can exit the error memory display as follows:

Push the button "

“under the display, or