109
Corrections
35.1 Fix the connections.
35.2 Disassemble the valve and check that the
plunger is free to move and that the seat
is clean and free from debris.
35.3 First replace the ANL-T2 board, if that
does not solve the problem then replace
the DIG-T2.
Possible cause check-up and tests
The problem may be a mechanical failure of the
valve, the valve driver located on the ANL-T2
board or the control circuit on the DIG-T2 board.
35.1 Check the connection between the
connector JP10 - 12 and the valve for a
ground short.
35.2 Remove the cover protecting the
terminals of the coil and check the
voltage across the coil when the solenoid
is connected. If the coil voltage is less
than 2V and the valve is open, there is a
mechanical problem.
35.3 If the voltage across the coil is higher
than 10VDC, then the ANL-T2 or the
DIG-T2 board are faulty.
10. TROUBLESHOOTING (cont.)
10.4 In Process Malfunction (cont.)
Symptom
35. Fast Exhaust valve (73) is
always open.
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