1
Multi-functional Flow Control Valve for
Water Treatment Systems
65510 (Old Model No.: N74Q1)
65610 (Old Model No.: N74Q3)
55510 (Old Model No.: N75Q1)
55610 (Old Model No.: N75Q3)
1. Basic Setting & Usage
1.1 The Function of PC Board
A. Button lock indicator
When the fourth decimal point of digital tube turns on, it indicates the
buttons are locked. At this moment any single button will not work (No
operation in one minute, the fourth decimal point of the digital tube will light
on and lock the buttons.)
Solution: Press and hold both
and
for 5 seconds until the decimal
point lights off.
