Viessmann B2HF, Инструкции по установке и обслуживанию для подрядчиков

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94
Displayed fault
code System characteristics Cause Measures
F.357 Burner in a fault state Insufficient gas supply
■
Check that the gas shut-off valve
is open.
■
Optically check input-side screen
in the gas solenoid valve for con-
tamination.
■
Test static gas pressure and gas
flow pressure.
■
Check that on-site gas line and
gas flow switch are correctly
sized.
Note
If the building pressure regulator
has a leak, you may notice rising
pressure when the burner is idle.
When the system is restarted, the
gas flow switch may trip.
If the static pressure doesn't drop,
check cable to the fan unit. Check
whether the coil resistance at the
fuel valve is approx. 4 k
Ω
(plug 35,
contact 2 and 4).
Check the ignition electrode for
damaged insulation.
Reset the appliance.
F.359 Burner in a fault state No ignition spark
■
Check whether the ignition elec-
trode insulation is damaged.
■
Check for a voltage of 230 V
∼
at
the ignition module during the ig-
nition phase. If not, replace the
BCU burner control unit.
■
If 230 V~ is present at the igni-
tion module but there is still a
fault, replace the ignition module.
■
Check connection cables and
leads from ignition module and
ignition electrode.
Reset the appliance.
F.361 Burner in a fault state Flame signal is not
present or insufficient at
burner start. Check ionisation electrode and
connecting cable. Check plug-in
connections for loose contacts.
Note
Deposits on the electrodes indicate
foreign bodies in the combustion
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).
Reset the appliance.
Troubleshooting
Fault messages
(cont.)
5593201
Diagnosis