Note
It is the law that any service work must be carried out by a competent CORGI
registered engineer.
General
Before looking for a fault condition,
check that:
&
The mains electrical supply is
turned on.
&
The clock and / or room thermostat
(if fitted) are calling for heat (CH
‘
faults
’
only).
&
The gas service cock is open.
&
The DHW (Combi only) and CH iso-
lation cocks are open.
&
The system is at design pressure.
Before attempting any electrical fault
finding, always conduct the prelimin-
ary electrical system safety checks.
On completion of any service or fault
finding operation involving making or
breaking electrical connections
always check for earth continuity,
polarity and resistance to earth.
Function sequence and possible faults
Display screen
Remedy
Control unit is-
sues heat de-
mand
No
Increase set value
and ensure heat is
drawn off
Yes
Fan starts
No
after approx. 51 s
Checking fan
cables and plugs
Fault
F5/F9
Yes
Air pressure lim-
iter enables start
(contact closed
between term-
inals "X8.7" and
"X8.8")
No
after approx. 51 s
Check fan cables
and fan plug-in
connections,
check fan
Fault
F5/F9
Fault finding
69
Troubleshooting
58
62
670
GB
Service
Содержание Vitodens 100
Страница 41: ...Opening the control unit housing Electrical connections 41 Installation 5862 670 GB Installation ...
Страница 82: ...A1 Main PCB A2 Programming unit Connection and wiring diagrams combi boiler 82 Designs 5862 670 GB ...
Страница 84: ...A1 Main PCB A2 Programming unit Connection and wiring diagram system boiler 84 Designs 5862 670 GB ...
Страница 88: ...Parts lists cont 88 Parts lists 5862 670 GB ...
Страница 89: ...Parts lists cont 89 Parts lists 5862 670 GB Service ...
Страница 90: ...Parts lists cont 90 Parts lists 5862 670 GB ...
Страница 91: ...Parts lists cont 91 Parts lists 5862 670 GB Service ...
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