Technical data

12. Fault Finding
13. Short Parts List
Problem Cause Solution
Incorrect water temperature Incorrect gas rate Check the gas supply to appliance gas service cock
Open the gas service cock
Check the burner pressure
Check the inlet pressure
Water section sticking or faulty Clean or replace
Incorrect water flow rate Incoming supply valve closed Open supply valve
Low water pressure Check the water pressure is above 0.1 bar
Water section sticking or faulty Clean or replace
Noise Scale in heat exchanger Descale and service
High gas rate Check the burner pressure
Low water flow rate Check the water flow rate
Pilot flame will not stay alight No gas supply Connect gas supply
Gas service cock closed Open gas service cock
Air in gas line Purge the line
Pilot injector blocked Clean/replace the injector
No spark Clean or replace the electrode, Piezo unit or cable
Main burner will not light Gas pressure low Check the inlet and burner pressure
Gas service cock partially closed Open the gas service cock
Low water rate Check the water rate
Water section diaphragm faulty Replace the diaphragm
Gas valve faulty Replace the gas valve
Explosive ignition Reduced pilot flame Clean or replace the pilot injector assembly
Faulty slow ignition valve Replace the slow ignition valve
Part Manufacturer's Reference
Pilot Burner 8 718 105 048
Pilot Injector 8 708 200 005
Thermocouple 8 747 202 082
Spark Electrode 8 708 107 002
Piezo Unit 8 748 108 023
Water Section 8 707 002 457
Diaphragm 8 700 503 051
Slow Ignition Valve 8 708 503 063
Gas Valve 8 707 011 028
Temperature Control Knob 8 702 000 111
Control Facia Plate 8 701 000 104
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