54 System Details
4.7.15 Water Pressure Sensor
Item Description
Function Analysis of heating system water pressure ratios.
Fault Unable to detect or measure changes of water pressure.
Symptoms The water top-up system does not operate automatically.
Error codes E351, E352, E353
Diagnostics
1. Visual inspection: Check the circulation pump’s wiring connections.
2. Voltage test: Test the voltage meets the specifications shown below.
Testing/inspection
information
Black-Red: DC 0-5 V
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