59
Displayed fault
code
System characteristics
Cause
Measures
62
Burner in a fault state
High limit safety cut-out
has responded.
■
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 (circulation pump).
■
Check function of 3-way diverter
valve. Vent the system.
Reset the appliance.
63
Burner in a fault state
Flue gas temperature lim-
iter has responded.
■
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 (circulation pump).
■
Check function of 3-way diverter
valve.
Vent the system.
Reset the appliance once the flue
system has cooled down.
67
Burner in a fault state
Ionisation current lies out-
side the permissible range
Check gas supply (gas pressure
and gas flow switch), check gas
solenoid valve and inlet strainer.
Check ionisation electrode for the
following:
■
Clearance to burner gauze as-
sembly
■
Check the electrode/burner
gauze assembly for dirt.
If specified measures don't help,
replace fan unit.
Reset the appliance.
68
Burner in a fault state
Flame signal is already
present at burner start.
Close gas shut-off valve. Remove
connecting cable of the ionisation
electrode. Reset the appliance.
If the fault persists, replace the
HBMU heat management unit. See
chapter "Replacing the HBMU heat
management 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 ...