Tuttnauer 2540 EHS, Руководство техника

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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.