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Sales/Spares & Replacement Help Line 01604 762881
WATER PRESSURE TOO HIGH
DHW SENSOR LOCKOUT
HE DHW OUTLET SENSOR
DRIFT TEST WAITING
YES
YES
YES
YES
YES
YES
YES
Replace the water pressure sensor.
Does the resistance of the sensor match the graph? See Figure 52.
Is there continuity in the wires between sensor and X5?
Replace DHW sensor.
NO
NO
NO
NO
NO
NO
NO
NO
Release water from system.
Correct the wiring.
Correct the wiring.
Reset boiler type 5
Replace the faulty sensor
Refit the connections.
Replace DHW sensor
Correct the wiring.
Is the water system pressure under 2.8bar?
Is the wiring securely connected to sensor?
Is the boiler a system type with heat recovery?
Does the resistance of the flow and return sensors correspond to a
temperature value of less than 5°?
Are the connections on water sensor secure?
Is wiring secure on to X5 at PCB?
Replace the PCB
OUTDOOR SENSOR ERROR
YES
YES
Replace board
NO
NO
Reset outside temperature compensation (P20) to 0
Replace sensor
Is the outdoor sensor connected?
Is the resistance of the outside temperature sensor between 5 and 30
kohms?
WATER PRESSURE SENSOR
YES
NO
Connect the sensor.
Is the water pressure sensor connected
Replace the sensor.