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Corrections
10.1 Replace the solenoid. If this does
not help, repair the mechanical part
of the valve or replace the valve.
10.2 Fix the connections.
10.3 Replace board DIG-T2.
10.4 Replace ANL-T2 board.
11.1 Replace faulty valve.
11.2 Replace the board.
11.3 Fix the connections.
11.4 Replace the solenoid..
Repair or replace the valve.
11.5 Replace ANL-T2 board.
Possible cause check-up and tests
The problem may be caused by the mechanical
part of the valve, the solenoid, the driver on
ANL-T2 board or the control circuit on DIG-T2.
10.1 Check the solenoid coil input voltage with the
solenoid connected to the valve. If the valve is
closed despite the voltage being higher than
10V, the problem could be the solenoid or a
mechanical problem at the valve.
10.2 Check the connection between connector
JP5/5 and the valve.
10.3 Check TP9. If the voltage is constantly 0VDC
while the valve must be open, DIG-T2 board
is faulty.
10.4 If all items checked above conform to
requirements, ANL-T2 board is faulty.
The problem may be caused by the mechanical
part of the valve, the solenoid, the driver located
on the ANL-T2 board or the control circuit on
the DIG-T2 board.
11.1 Water valve is stuck
11.2 Check TP9. If the voltage is higher than 4V,
the control of the valve is OK, and board
DIG-T2 is faulty.
If the voltage is 0V and valve is open, the
problem is not the control circuit but other
elements of the system.
11.3 Check the connection between connector
JP5/5 and the valve.
11.4 Check the solenoid coil input voltage with the
solenoid connected. Remove the cover that
protects the terminals of the coil. If the valve
is open despite the voltage being less than
2VDC, there is a mechanical problem.
11.5 If all items checked above conform to
requirements, ANL-T2 board is faulty.
Symptom
10. Water valve is always
closed.
11. Water valve is always open
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