Boiler not operating with a heating / hot water demand
Replace
control box
| Yes |
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230V at |
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| Replace | ||||
solenoid coil |
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| No |
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| pump | ||||||
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in purge? |
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Replace
lead
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| Photo cell |
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| No |
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| Yes | ||||||||
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| lead OK? |
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| Yes |
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| Disconnect photo cell, |
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| reset lockout, burner |
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No | ||||||||||||||
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| lights then locks out? |
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Stray light
on photo
cell?
No
Replace
photo cell
Replace coil
lead
No
Coil lead
OK?
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| Replace |
Yes |
| |
| control box | |
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These fault finding charts locate and rectify faults. correct and complete we Worcester, Bosch Group to be competent. |
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL
FAULT FINDING
|
| Yes |
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| Yes |
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| No |
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Burner | Yes | Burner | No | Lockout | No | Pump | Yes | Spark | Yes | Lockout | No | Nozzle | No | 230V at | Yes | 2.2kΩ | No | Replace | |
within 1 | produces | after purge | atomising | solenoid | |||||||||||||||
motor runs? | lights | produced? | across | solenoid coil | |||||||||||||||
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| second? |
| pressure? |
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| before oil |
| fuel? |
| coil? |
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| immediately |
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| solenoid |
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| motor runs? |
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| solenoid |
| Yes |
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| coil? |
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| opens? |
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| Yes |
| No |
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| No |
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| Combustion |
| Reset air |
| Yes |
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No |
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| air setting | No |
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| setting |
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| Drive |
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| correct? |
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| Replace |
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| Solenoid |
| Replace | |||
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| coupling |
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| Yes |
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| No | ||||
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| control box |
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| operating? | pump | ||||
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| broken? |
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| 230V at |
| Transformer |
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| No |
| No |
| Combustion |
| Reset |
| Yes |
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| transformer? | lead OK? |
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| head set | No | combustion |
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| |
Control box |
| Motor or |
| Replace |
| Oil to |
| Yes |
| Yes |
| correctly? |
| head |
| Pipe to |
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| |
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Yes | pump | Yes | motor/ |
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| Yes |
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| nozzle |
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locks out? |
| pump? |
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| seized? |
| pump |
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| Electrodes |
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| holder OK? |
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| Replace |
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No |
| No |
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| Yes |
| & leads |
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| Flame off |
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| Yes |
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| control box |
|
| Boiler or |
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| OK? |
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| and | No |
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| flue blocked |
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| Check |
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| Yes |
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| Oil check |
| Replace oil | |||
L & N to |
| 230V at |
|
| Replace oil |
|
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| ||||||
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| ||||||||
| No | connections/ |
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| Yes |
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| valve OK? | No | check valve | ||||
control box? |
| motor? |
| pump |
|
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| |||||||
|
| replace leads |
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| (if fitted) |
| (if fitted) | ||||
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| Replace |
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| ||||
No |
| Yes |
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| Yes |
|
| ||
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| transformer |
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| If BF |
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| ||||
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| remove |
|
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| |
Check boiler |
| Motor 40Ω |
| Replace |
|
|
|
|
|
|
| burner |
| Reseal BF |
| Replace |
|
| |
controls & |
| across | No |
|
|
|
|
|
|
| snorkle tube | Yes | on |
|
|
| |||
| motor |
|
|
|
|
|
|
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| nozzle |
|
| |||||||
supply |
| L & N? |
|
|
|
|
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|
|
| & retest. |
| reposition |
|
|
| |||
|
|
|
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|
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|
|
|
|
|
|
|
| |||||
|
| Yes |
|
|
|
|
|
|
|
|
| Lights OK? |
|
|
|
|
|
| |
|
|
|
|
|
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|
| ||
|
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| No |
|
|
|
|
|
| |
|
| Replace |
|
|
|
|
|
|
|
|
|
|
| Replace |
|
|
|
| |
|
| motor |
|
|
|
|
|
|
|
|
|
| Yes |
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| Photo cell | control box |
|
|
|
| |||
|
| capacitor |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| functional? |
|
|
|
|
|
| ||
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
| ||
Note: This chart assumes all wiring within the control box base is correct, if in doubt check the wiring against the diagram on | No |
|
|
|
|
|
| ||||||||||||
the base of the control box before replacing any components. |
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
All resistance measurements are actual measured values and some variation is to be expected, therefore measured values |
|
|
|
|
|
|
| ||||||||||||
should be similar to but not necessarily identical to the given values. |
|
|
|
|
|
| Replace |
|
| Measure all 230V tests between | |||||||||
The operation of the photo cell can be tested by measuring the resistance across the photo cell, it should be a high resistance | photo cell |
|
| Neutral (N) and the pin, wire or | |||||||||||||||
(greater than 10MΩ or open circuit) in the dark and low resistance (15kΩ or less) in light. |
|
|
|
|
|
| terminal specified. |
|
| ||||||||||
Burners on balanced flue systems can recirculate flue products resulting in the burner cycling, if this happens check the flue |
|
|
|
|
|
|
| ||||||||||||
system integrity and the terminal position. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whilst every effort has been taken to ensure the information given is cannot guarantee that every eventuality has been covered. cannot be held responsible for costs incurred by persons not deemed | are provided to assist competent and suitably qualified engineers to | ||
SATRONIC CONTROL BOX |
|
| FAULT FINDING LOGIC FOR |
| |||
|
|
|
|
46
FAULT FINDING
& DIAGRAMS