Main Multipoint BF Instructions d'utilisation, d'installation et d'entretien - Page 18
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Problem
Incorrect water temperature.
Incorrect water flow rate.
Noise.
Pilot flame will not light or stay
lit.
Main burner will not light.
Explosive ignition.
18
Cause
Incorrect gas rate.
Water section sticking or faulty.
Incoming supply valve closed.
Low water pressure.
Water section sticking or faulty.
Scale in heat exchanger.
High gas rate.
Low water flow rate.
No gas supply.
Gas isolation valve closed.
Air in gas line.
Pilot injector blocked.
No spark.
Gas pressure low.
Gas isolation valve partially closed.
Low water rate.
Water section diaphragm faulty.
Gas valve faulty.
Reduced pilot flame.
Faulty slow ignition valve.
1 Knob and Bezel
2 Pilot Burner (75)
Pilot Burner
3 Pilot Injector (5)
Pilot Injector
4 Thermocouple
5 Gas Valve
6 Water valve
7 Diaphragm (F)
8 Piezo Igniter
9 Spark Electrode
Fig. 23
15.Fault Finding
Solution
Check the gas supply to appliance gas isolation valve.
Open the gas isolation valve.
Check the burner pressure.
Check the inlet pressure.
Clean or replace.
Open supply valve.
Check the water pressure is above 0.2 bar.
Clean or replace.
Descale and service.
Check the burner pressure.
Check the water flow rate.
Connect gas supply.
Open gas isolation valve.
Purge the line.
Clean/replace the injector.
Clean or replace the electrode, Piezo unit or cable.
Check the inlet and burner pressure.
Open the gas isolation valve.
Check the water rate.
Replace the diaphragm.
Replace the gas valve.
Clean or replace the pilot injector assembly.
Replace the slow ignition valve.
16. Short Parts List
Description
(Se-duct installation)
(Se-duct installation)
Part Number
5 110 844
5 110 880
5 113 993
5 110 884
5 113 787
5 110 886
5 110 894
5 110 959
5 110 963
5 110 953
5 110 956
6 720 607 090