Checking the thermocouple
If the burner control unit cannot be
reset after a fault shutdown, although
the boiler water temperature is below
approx. 90 °C:
&
Pull the leads from
thermocouple
A
.
&
Check the continuity of the thermo-
couple with a multimeter.
&
Remove the faulty thermocouple.
&
Install a new thermocouple.
&
After commissioning, press reset
button
E
on the control unit.
Checking and replacing pressure differential sensor
Check the sensor in case of fault messages concerning the differential pressure
sensor:
&
Correct installation
&
Electrical connection
&
Correct position of the O-rings inside the adaptor
&
Are the test nipples closed with plugs?
Replace the sensor if fault messages persist.
Repairs
(cont.)
90
Troubleshooting
56
92
550
GB
Содержание VITODENS 300 WB3A
Страница 10: ...Opening the control unit housing 10 5862 570 GB...
Страница 14: ...Closing control unit housing and inserting user interface 14 5862 570 GB...
Страница 122: ...Temperature profile Factory set code F1 6 to F1 15 Control functions cont 106 Function description 5692 550 GB...
Страница 125: ...A1 Main PCB A2 Mains supply unit Connection and wiring diagrams external connections 109 Designs 5692 550 GB...
Страница 129: ...Parts lists cont 113 Parts lists 5692 550 GB...
Страница 130: ...Parts lists cont 114 Parts lists 5692 550 GB...
Страница 131: ...Parts lists cont 115 Parts lists 5692 550 GB...
Страница 132: ...Parts lists cont 116 Parts lists 5692 550 GB...
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