FAULT FINDING LOGIC FOR
SATRONIC CONTROL BOX
Note: This chart assumes all wiring within the control box base is correct, if in doubt
check the wiring against the diagram on 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.
The operation of the photo cell can be tested by measuring the resistance across the
photo cell, it should be a high resistance (greater than 10MΩ or open circuit) in the
dark and low resistance (15kΩ or less) in light.
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.
These fault finding charts are provided to assist competent and suitably qualified engineers to
locate and rectify faults. Whilst every effort has been taken to ensure the information given is
correct and complete we cannot guarantee that every eventuality has been covered.
Worcester, Bosch Group cannot be held responsible for costs incurred by persons not deemed
to be competent.
Measure all 230V tests between
Neutral (N) and the pin, wire or
terminal specified.
FAULT FINDING
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR UTILITY 32/50 & 50/708 716
109 711B 07.2010
49
FAULT FINDING
& DIAGRAMS
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