62
Displayed fault
code
System characteristics
Cause
Measures
163
Burner in a fault state
Checksum error, data
memory access, HBMU
heat management unit
Reset the appliance.
If the fault occurs repeatedly, re-
place the HBMU heat management
unit. See chapter "Replacing the
HBMU heat management unit".
182
No DHW heating
Short circuit, outlet tem-
perature sensor (if instal-
led)
Check outlet temperature sensor
(plug X7, cores 3 and 4). Measure
sensor input on HBMU heat man-
agement unit. Set value: 3.3 V
–
with sensor disconnected
183
No DHW heating
Lead break, outlet temper-
ature sensor (if installed)
Check outlet temperature sensor
(plug X7, cores 3 and 4).
184
Burner in a fault state
Short circuit, flow temper-
ature sensor/high limit
safety cut-out
Check the flow temperature sen-
sor/high limit safety cut-out.
Check sensor lead. Replace faulty
component if required.
Reset the appliance.
185
Burner in a fault state
Lead break, flow tempera-
ture sensor/high limit safe-
ty cut-out
Check the flow temperature sen-
sor/high limit safety cut-out. Re-
place faulty component if required.
Reset the appliance.
345
Burner locked out, automatic
enabling after appliance cool-
down. Independent restart
Temperature limiter has
responded.
■
Ensure adequate heat transfer.
■
Check heating system fill level.
■
Check pre-charge pressure in di-
aphragm expansion vessel. Ad-
just to required system pressure.
■
Check whether flow rate is suffi-
cient (pump).
■
Check function of 3-way diverter
valve. Vent the system.
If the fault occurs during DHW
heating: Check the DHW cylinder
or plate heat exchanger for dirt and
scaling.
346
Burner in a fault state
Ionisation current calibra-
tion error
■
Check the gas supply pressure.
■
Check gas solenoid valve inlet
strainer for dirt.
■
Check ionisation electrode for
contamination.
■
Check flue system. Remove flue
gas recirculation if required.
■
Check the condensate drain
(condensate blockage).
Reset the appliance.
348
Burner in a fault state
Gas modulation valve
If several heat generators are con-
nected to a common flue system:
Check whether
"Multiple connec-
tion"
is set in the commissioning
assistant.
Check the flue system for unre-
stricted flow.
If fault remains, replace gas fan
unit.
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 ...