89
Displayed fault
code
System characteristics
Cause
Measures
F.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 (flow sensor and circulation
pump).
■
Check 3-way diverter valve func-
tion in actuator test. Vent the sys-
tem.
Reset the appliance.
F.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 (flow sensor and circulation
pump).
■
Check 3-way diverter valve func-
tion in actuator test.
Vent the system.
Reset the appliance once the flue
system has cooled down.
F.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 electrode/burner gauze
assembly for contamination.
If specified measures don't help,
replace fan unit.
Reset the appliance.
F.68
Burner in a fault state
Flame signal is already
present at burner start.
Close the gas shut-off valve. Re-
move connecting cable of the ioni-
sation electrode. Reset the appli-
ance.
If the fault continues to persist, re-
place BCU burner control unit (see
page 109)
Troubleshooting
Fault messages
(cont.)
5593201
Diagnosis
Содержание B2HF
Страница 33: ...33 2 2x 1 Fig 26 Installation sequence Closing the wiring chamber 5593201 Installation ...
Страница 45: ...45 1 2x 1 2 3 2x 2 3 Fig 32 Commissioning inspection maintenance Removing the front panel 5593201 ...
Страница 111: ...111 1 2 4 3 6 5 Fig 56 Troubleshooting Repairs cont 5593201 Diagnosis ...
Страница 134: ...134 WiFi router 31 Wiring diagram 121 Keyword index Keyword index cont 5593201 ...
Страница 135: ...135 5593201 ...