105
Corrections
31.1 Replace the DIG-T2 board.
31.2 Fix the connections.
31.3 Disassemble the valve and check that
the plunger is free to move and that the
seat is clean and free from debris.
31.4 Replace the coil.
Possible cause check-up and tests
The problem may be caused by the mechanical
part of the valve or the driver located on the
ANL-T2 board or the control circuit on the
DIG-T2 board.
31.1 Check TP10. If the voltage is
constantly <1VDC, while the valve is
supposed to be open, then the problem
is on DIG-T2 board.
31.2 Check the connection between
connector JP10 - 9 and the valve.
31.3 Check the coil input voltage with the
solenoid connected to the valve. If the
voltage is higher than 10VDC and the
valve does not open, then the solenoid
or the mechanical part of the valve are
faulty.
31.4 Take an ohm reading across the
solenoid coil, a 10W coil is 14-15
ohms and a 12W coil is 9-10 ohms. An
incorrect ohm reading means the coil is
faulty. Check from the coil terminal to
the ground terminal, any reading other
than 0VDC means the coil is faulty.
10. TROUBLESHOOTING (cont.)
10.4 In Process Malfunction (cont.)
Symptom
31. Slow exhaust valve (74) is
always close
To Next Page
Loading...
