71
Displayed fault
code
System characteristics
Cause
Measures
540
Burner in a fault state
Condensate backup in the
heat cell
■
Check system for condensate
backup.
■
Check the condensate drain and
trap.
■
Replace insulation blocks, elec-
trodes and burner gauze assem-
bly if required.
Note
To prevent water damage, detach
fan unit before removing the burn-
er.
Reset the appliance.
544
Emergency function operat-
ing mode is activated for
heating circuit 2:
Mixer closes. Heating circuit
pump is operational.
Lead break, flow tempera-
ture sensor, heating circuit
2 with mixer
Incorrect setting during
commissioning
Check flow temperature sensor,
mixer 2.
Measure voltage at sensor input on
electronics module. Set value:
3.3 V
–
with sensor disconnected.
Check setting in the commission-
ing assistant and correct if re-
quired.
Checking setting of ADIO rotary
switch.
545
Emergency function operat-
ing mode is activated for
heating circuit 2:
Mixer closes. Heating circuit
pump is operational.
Short circuit, flow temper-
ature sensor for heating
circuit 2 with mixer
Check flow temperature sensor,
mixer 2.
Measure voltage at sensor input on
electronics module. Set value:
3.3 V
–
with sensor disconnected
738
Normal operation
OpenTherm remote con-
trol unit connected but not
configured
Set C.7 in the commissioning as-
sistant to a value of 14.
Repairs
!
Please note
Residual water will escape when the boiler or
one of the following components is fitted or
removed:
■
Water-filled pipework
■
Heat exchanger
■
Circulation pumps
■
Plate heat exchanger
■
Components fitted in the heating water or
DHW circuit.
Water ingress can result in damage to other
components.
Protect the following components against
ingress of water:
■
Control unit components (especially in the
service position)
■
Electrical components
■
Plug-in connections
■
Cables and leads
Troubleshooting
Fault messages
(cont.)
6173886
Diagnosis
Содержание B0KA
Страница 14: ...14 1 4 5 3 2 Fig 4 Installation sequence Removing the boiler from the packaging 6173886 Installation ...
Страница 28: ...28 1 2 Fig 20 Installation sequence Fitting the front panel 6173886 Installation ...
Страница 78: ...78 1 2 3 6 4 5 7 Fig 42 Troubleshooting Repairs cont 6173886 Diagnosis ...