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Potterton Solar - Solar Thermal Domestic Hot Water System 25
5
.0 Fault finding
5.1 Failures with error message
Some system failure modes can be recognised by the
solar differential temperature controller and will be
indicated by an error message on the controller display.
Refer to the table below for details of possible errors
and suggested measures to rectify.
Error representation on display Possible reasons Measures
flashing
•
Sensor wire broken • Check wire
• Sensor defect • Check sensor resistance, if necessary exchange sensor
f
lashing
• Short circuit in sensor wire • Check wire
• Sensor defect • Check sensor resistance, if necessary exchange sensor
• Error in pump connection • Check cabling
• Pump defect • Exchange pump
• Air in the system • Check the float of the flow meter moves
when the system runs (if visible)
• Connection with flow • Check wire
meter defect
• Sensor wire broken • Check wire
• Sensor defect • Check sensor resistance, if necessary exchange sensor
!
!
!
+
Circulation error: no flow
Additionally at energy
productivity measurement:
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