www.tradeplumbing.co.uk Call Sales On 08708034288
5.FAULT FINDING
FAULT | POSSIBLE CAUSES | REMEDY | |
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| 1) | Mains cold water | Check and open Isolating |
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| supply shut off | and/or stop valve. Check |
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| water, Local Water Authority |
NO HOT WATER |
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2) | Line strainer | Turn off mains water supply, | |
FLOW |
| blocked | remove line strainer and |
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| clean |
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| 3) | Cold Water | Check direction of flow |
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| Combination valve | arrows on valve, refit in |
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| fitted incorrectly | correct position if necessary |
| 1) | Low mains water | Check pressure, consult |
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| pressure | Local Water Authority if |
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| necessary |
REDUCED FLOW |
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2) | Line strainer | Turn off mains water supply, | |
RATE |
| partially blocked | remove line strainer and |
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| clean |
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| 3) | Size of service | Increase to size stated on |
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| pipe too small | page 6 |
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| 1) | Direct immersion | Check immersion heater, |
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| heater is not | switch on if necessary |
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| switched on |
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| 2) | Direct thermal | Test thermostat operation |
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| and wiring, if faulty, | |
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| operated | correct/replace. Reset |
WATER FROM |
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3) | Boiler programmer | Check switch on domestic | |
HOT TAPS |
| set to central | hot water if necessary |
IS COLD |
| heating only |
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| (Indirect models) |
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| 4) | Boiler is not | Check boiler operation, if |
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| functioning | fault suspected consult |
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| (Indirect models) | manufacturer's instructions |
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| 5) | Indirect thermal | Test thermostat operation |
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| and wiring, if faulty, | |
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| operated | correct/replace. Reset |
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| 6) | Motorised valve | Check wiring and operation of |
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| jammed or not | motorised valve correct/ |
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| wired correctly | replace as necessary |
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DISCHARGE FROM | 1) | Pressure above 7 | Shut down boiler or immersion |
PRESSURE/ |
| bar, failure of | heater. Check pressure |
TEMPERATURE |
| pressure reducing | reducing valve and thermal |
RELIEF VALVE |
| valve. Temperature | controls. Replace if |
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| above 90 C failure | necessary |
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| of thermal control |
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DISCHARGE FROM | 1) | Continually. | Check pressure from valve. |
EXPANSION |
| Pressure reducing | Replace if over 3.5 bar |
VALVE |
| valve faulty |
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| 2) When heater is heating. | Check charge of vessel. Re- | |
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| Faulty expansion | charge vessel to 3.5 bar or |
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| vessel or lost charge | replace if necessary |
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www.tradeplumbing.co.uk Call Sales On 08708034288
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