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3. Flow Switch Checking
Definition: Flow switch (Reed SW.) is a vacuum tube with two thin metallic strips at open circuit
(NO) configuration while on standby. It activates or goes on close circuit by use of a magnet.
3.1) Set unit at vertical direction
Simulate like a unit standby Flow Switch (Reed SW.) still open circuit (as no water supply).
- Set Multi meter to Ohm range "Ω" or "
) " and unplug the reed switch connector from the
)
)
)
Control PCB and check Reed Switch as in the pictures.
Pole - Pole
Check
Meter Result
Cause
Action
"Beep" signal or (~ 0 Ω)
Reed SW. contact closed
Change new one*
Pole - Pole
Pass
No action
No signal "OL" or ( Ω)
Remark: "OL" = Over Load for Digital Multimeter, " Ω" = Over Load for Analog Multimeter
* Note: Recommend replacing magnet set at the same time.
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