Hamworthy Sherborne SE64he, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
29
SHERBORNE 500001167/E
9.0 FAULT FINDING
The Sherborne boiler is equipped with full self-diagnostic fault indication, with faults allocated a code, which is
displayed on the screen - refer to section 8 Controls Operation.
The common fault codes are detailed in section 8 Fault codes not detailed in this manual should only be
investigated by an Engineer.
9.1 Temperature Limit Thermostat
The electronic control thermostat has several safety levels built in such that a controlled shutdown should occur
before the limit thermostat is activated. Should these safety levels be overridden (say external pump overrun
failure after shutdown) the temperature limit thermostat will trip initiating a boiler shutdown, preventing the boiler
from firing. The code (111) on the controls display will flash indicating that the temperature limit thermostat has
tripped.
The temperature limit thermostat is located behind the yellow labelled
cover above the controls fascia. To reset it remove the cover to access
the thermostat control & reset button. Unscrew the black cover over the
reset button and press the button.
Before attempting to reset the limit thermostat the boiler must be allowed to cool to normal operating
temperature. If, after pushing the reset pushbutton & resetting the lockout the code on the display does not
extinguish & the boiler does not fire up, it is possible that the limit thermostat will not reset because the boiler is
still too hot.
Always carry out an investigation to ascertain the reason for overheating. The most common cause of overheating is lack
of water flow rate through the boiler - possibly due to external pump problems.
If the boiler continues to lockout, then an investigation must be made to ascertain the cause - refer to section 9.3
below.
9.2 Fault Finding Procedures
General error messages are detailed in section 8 to assist with fault finding. If the boiler still cannot be operated
satisfactorily after following the instructions, consult your Hamworthy Heating for assistance.
9.3 Possible Causes of Boiler Lockout
1) Ignition failure due to faulty igniter.
2) Ignition failure due to faulty gas valve.
3) Ignition failure due to No or low gas supply pressure.
4) No ignition due to faulty controller.
5) Ignition failure due to faulty flame probe or sensing circuit.
6) High temperature
7) Unnecessary pressing of reset when boiler is running
Should a fault code appear which cannot be reset, or a fault code repeatedly occurs,
contact Hamworthy Heating for assistance. Do not continue to operate or use the boiler
as this may cause damage to the controls.