Fault Finding - Worcester W 125 FL Installation And Servicing Instructions

Description
1 Front Cover
2 Temp. Control Knob
3 Flue gas Deflector
Heating Body
4
5
Main Burner Assembly
6
Main Burner Injector
7 Gas Valve Assembly
8 Slide Assembly & Guide plate
9 Piezo-Igniter
Cross Ignition bolt
10
11 Magnetic Unit
12 Thermocouple
13 Temperature Limit Thermostat
14 Gas Inlet Washer
15
Pilot Burner
Pilot Injector
16
Pilot Tube
17
18 Spark Electrode
19 Ignition Lead
20 Pilot Air Collector
Pilot Air Inlet Pipe
21
Water Valve Assembly
22
Water Valve Cover
23
24 Cover Repair Kit
25 Diaphragm
26 Water Strainer
27 Valve spindle
Selector Screw
28
Venturi
29

12. Fault Finding

Problem
Incorrect water temperature
Incorrect water flow rate
Noise
Pilot flame will not stay alight
Main burner will not light
Buner extinguishes while in operation Oxygen deficiency sensor activated Ventilate the room and re-ignite the appliance some
Propane
8 705 411 730
8 702 000 219
8 705 505 249
8 705 406 248
8 708 120 239
8 708 202 130
8 707 011 786
8 701 000 105
8 748 108 023
---------------
8 707 201 015
8 707 202 039
8 707 206 132
8 700 103 014
8 708 105 327
8 708 200 138
8 700 707 334
8 708 107 002
8 704 401 022
8 701 302 074
8 700 705 527
8 707 002 630
8 705 500 101
8 700 306 098
8 700 503 050
8 700 507 001
8 708 500 277
8 708 500 233
8 708 205 275
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 service cock closed
Air in gas line
Pilot injector blocked
No spark
Gas pressure low
Gas service cock partially closed
Low water rate
Water section diaphragm faulty
Gas valve faulty
Natural Gas
8 708 120 352
8 708 202 157
8 707 011 100
8 703 407 027
8 708 105 320
8 748 200 120
8 701 302 082
Solution
Check the gas supply to appliance gas service cock
Open the gas service cock
Check the burner pressure
Check the inlet pressure
Clean or replace
Open supply valve
Check if water pressure is above 0.15 bar
Clean or replace
Descale and service
Check the burner pressure
Check the water flow rate
Connect gas supply
Open gas service cock
Purge the line
Clean or replace the injector
Clean or replace the electrode, piezo unit or cable
Check the inlet and burner pressure
Open the gas service cock
Check the water rate
Replace the diaphragm
Replace the gas valve
minutes later. If it happens again, contact a Corgi
registered technician.
11