WaterLogic WL4FW FIREWALL Fault Finding page 16

Irregular / Intermittent Dispensing
Possible Reason
Too much water pressure.
Recommend 2.7 – 4Bar for
WL4FW Water Treatment
System to operate properly.
Loose or bad connection on
the Front Dispensing PCB or
Solenoid Connector
Solenoid
Dispensing button is broken on
PCB
Mineral deposits on the
expansion slot inside the Hot
Tank vent chamber which
blocks the normal path of
water to expand.
WL4FW Fault Finding
Check water pressure at the inlet bulkhead with a water
pressure gauge.
Additional method of verification is to turn off water to unit
and press the dispense button. Does the solenoid open
without water pressure to the unit? Listen for solenoid to
activate, not button "click".
Adjust water pressure to 2.7-4Bar.
Check that they are connected properly and tightened.
If both the Water Pressure and PCB have been ruled out,
then it is the Solenoid.
Replace Solenoid.
Check PCB for loose or damaged button. Replace PCB as
necessary.
Descale Hot Tank.
Solution
Page 16 – Revision: EU27-11-2017