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Causes of faults table (cont’d)
46.
Setting of the RPM switch of the pump is too low.
47.
Sensors changed around (return sensor -S2 and hot water sensor S5).
48.
Fuse F1.Automatic re set
49.
Fuse F2 Automatic re set
50.
Line voltage 230 VAC.
51.
Parameter(s) in the installer program entered incorrectly.
52.
Open control, room thermostat, or common thermostat connected to an incorrect connector strip
port.
53.
Pulse width program in the installer menu incorrectly programmed; or steps are too long.
54.
Clock program of the clock thermostat should start earlier in the morning.
55.
Flow and return on the boiler have been changed around.
56.
Cable or plug to the three-way valve connected incorrectly.
57.
Priority sensor (S3) not placed correctly, or defect.
60.
Cable harness connectors incorrectly mounted on the PCB.
61.
Gas safety valve defect.
62.
After programming using the computer, confirms the new settings.
63.
Incorrect parameters or values outside the range of the program have been entered.
64.
The burner control is frequently checking the supply voltage.
65.
Mechanical defect in the Reset key when “H” is blinking; when the H is not blinking, the burner
control is defective.
66.
Gas valve is not correctly adjusted at maximum input.
