53
ecoTEC plus 937 installation and maintenance manual
Display
Meaning
Displayed value/settable value
d.0
Heating partial load
Adjustable heating partial load in kW
(factory setting: max. output)
d.1
Water pump over run time for heating mode
2 - 60 minutes (factory setting: 5 minutes)
d.2
Max. anti cycle time heating at 20°C flow temperature
2 - 60 minutes (factory setting: 20 minutes)
d.3
Measured value of the domestic hot water temperature
in °C
d.4
Measured value for the warmstart sensor
in °C
d.5
Flow temperature target value or return temperature
target value, if return flow regulation selected
in °C, max. of the value set in d.71
limited by an eBUS controller, if fitted)
d.6
Hot water target temperature
in °C, 35 to 65 °C
d.7
Warm start target temperature
in °C, 40 to 65 °C
d.8
Heat demand of external controllers (terminal 3-4)
1=closed (heating requirement)0=opened (no heating
requirement)
d.9
Flow target temperature from external analogue regulator
to terminal 7-8-9/eBus
in °C, minimum from ext. eBus target value and target value
terminal 7
d.10
Status internal heating pump
1, 2 = on, 0 = off
d.11
Status external heating pump (via accessory module)
1 to 100 = on, 0 = off
d.12
Cylinder charging pump (via accessories module)
1 to 100 = on, 0 = off
d.13
External hot water circulation pump (via accessory
module)
1 to 100 = on, 0 = off
d.22
Hot water demand
1 = on, 0 = off
d.23
Summer /winter function
1 = Winter, 0 = Summer
d.25
Hot water activation via eBUS controller
1 = yes, 0 = no
d.30
Control signal for both gas valves
1 = on, 0 = off
d.33
Fan speed target value
in upm/10
d.34
Fan speed actual value
in upm/10
d.35
Internal diverter valve position
0 = heating; 100 = hot water; 40 = mid-position
d.36
Hot water flow sensor
in l/min
d.40
Flow temperature
actual value in °C
d.41
Return flow temperature
actual value in °C
d.44
digitalised ionisation voltage
Display range 0 to 102, >80 no flame, <40 good flame display
d.47
External temperature (only on weather-compensated
Vaillant controllers)
actual value in °C
d.67
Remaining burner anti-cycling time
in minutes
d.76
Unit variants (device specific number)
00 to 99
d.90
Status of the digital controller
1 = identified, 0 = unidentified (eBUS Address <=10)
d.91
DCF status with connected external probe with DCF77
receiver (not available in the UK)
0 = no reception, 1 = reception, 2 = synchronised, 3 = valid
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.97
Activation of the second diagnostic level
Password: 17
Table 8.2 Diagnostic codes of the first diagnosis level
Troubleshooting 8
