An error occurs with position-proportional type automatic valve position adjustment (V.AT).

(1) Check the wiring: In MAN mode, set OUT display. Use the UP and DOWN keys to confirm operation of the control valve, and that the OUT value changes. The UP key operates the normal rotation side relay, and the DOWN key operates the reverse rotation side relay.
(2) If it takes a long time to reach all closed or all open, or if the change in the feedback signal is small, an error may occur.

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