Hanseatic WQP12-7311D, Technical & Service Manual

Page: 21 / 37

Inspect Flowmeter
1.Open the protecting box and take out PCB;
2.With the door closed, unplug the CON2 wire(shown in below picture), then use the
multi-meter Diode shelf to test between black wire(FM) and blue wire(GND) to confirm
whether electrical pulse is sent out while water is passing through flowmeter, or not.
3. If there is continual electrical pulse, the multi-meter will send out sound “de” continually.
4.if there is no electrical pulse, the multi-meter will not send sound. In this case, it means
something wrong with flowmeter circuit. We should check the connection first. If the
problem hasn’t been solved by re-connection, we should replace the air breaker..
Access Flowmeter
1. Remove the baseboard, top panel and left side panel.
2. Remove the plastic nut inside tub, which secures the air breaker to tub.(Because
flowmeter is integrated into air breaker, replace air breaker if flowmeter has failure. )
3. Disconnect the wire and remove clamp fastening hose to air breaker.
4. Take out air breaker.
5. Reverse the above procedure to install.
Flowmeter Theory of parts - >
- 21 -
FM
GND