Viessmann B2HF, Инструкции по установке и обслуживанию для подрядчиков

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101
Displayed fault
code System characteristics Cause Measures
F.468 Burner in a fault state Ionisation current too high
during calibration Check gap between ionisation
electrode and burner gauze as-
sembly.
Heat generator installation
and service instructions
Check whether there is a lot of
dust in the ventilation air (e.g. from
construction work).
Reset the appliance.
Note
Deposits on the electrodes indicate
foreign bodies in the ventilation air.
Check the installation room and
flue system for causes of the de-
posits. For example: Laundry de-
tergents, cleaning agents, toilet-
ries, deposits in the ventilation air
supply (chimney).
If burner gauze assembly and ioni-
sation electrode have been re-
placed, also clean fan unit, gas/air
channel and Venturi extension.
F.471 No heat demand System pressure sensor
not available, lead break
or short circuit
■
Check system pressure sensor
(plug
aND
).
■
Check lead and plug-in connec-
tion.
■
Measure, to see if supply voltage
to sensor is 5 V
–
.
F.473 No heat demand HMU heat management
unit communication error Check connecting cable between
burner control unit and HMU heat
management unit.
F.474 Burner in a fault state Error in scheduled pro-
gram run monitoring Reset the appliance.
If fault occurs repeatedly, replace
BCU burner control unit (see
page 109).
F.517 Control mode, remote control
unit not functioning Lead break, PlusBus ca-
ble, incorrect appliance
address set, remote con-
trol faulty
■
Check setting in commissioning
assistant.
■
Check remote control cable.
■
Check remote control subscriber
number. Replace faulty remote
control if applicable.
F.527 Burner in a fault state Incorrect parameter set,
HMU heat management
unit Overwrite (flash) the HMU heat
management unit with the correct
parameter set, see page 109.
F.528 Burner in a fault state Incorrect parameter set,
BCU burner control unit Overwrite (flash) the BCU burner
control unit with the correct param-
eter set, see page 109.
F.530 Solar function limited Sensor value not available
or lead break of one or
more sensors/missing
sensor(s) Check sensor(s), or connect miss-
ing sensor(s) to SDIO electronics
module.
Troubleshooting
Fault messages
(cont.)
5593201
Diagnosis