Display screen
Remedy
Control unit
issues heat
demand
No
Set value
Yes
Fan starts
No
After approx.
51 seconds
Check cables and
plug-in connec-
tions
Fault
F9
Yes
Differential pres-
sure sensor
enables start
(0.75 V across
terminals X8.5
and X8.6)
No
After approx.
51 seconds
Check fan cables
and fan plug-in
connections,
check fan
Fault
E6
Yes
Ignition
No
Fault
Check the ignition
module (control
voltage 230 V
across plugs X2.1
and X2.2)
F4
Yes
Gas combination
valve opens
No
Fault
Check the gas
train (control vol-
tage 230 V) and
gas supply pres-
sure
F4
Yes
Further details regarding the individual steps
(cont.)
11
Initial start-up, inspection, maintenance
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...
Страница 133: ...Parts lists cont 117 Parts lists 5692 550 GB...
Страница 145: ...129 5692 550 GB...
Страница 146: ...130 5692 550 GB...
Страница 147: ...131 5692 550 GB...