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u1 Undercounter Systems
Install & Operation Guide
GB
Trouble Shooting
Fault Diagnosis Guide 1 – No Water Dispenses
Problem/ Report
Possible Cause
Suggested Action
No Water Dispenses
From Ambient or Cold Valve
Button not being pressed enough Press button firmly.
Faulty controls PCB
Replace Control PCB – Check
for 24 VDC outputs if necessary.
“Waterblock” tripped off
Reset “Waterblock” (and check
for cause of leakage)
Faulty dispense control panel
membrane switch
Check and replace if required
Faulty Solenoid Valve
Valve clicking but no water -
Check if hole in centre of washer
is clear.
Check valve action. Carefully
dismantle valve and clean out/
part replace/complete replace
as needed.
If there is output, replace
solenoid coil/whole valve coil/
whole valve assembly complete.
Leak detector has disabled
dispense operation.
Check for internal leakage,
ensure probes are dry and reset.
From Cold Valve
Firstly all as for Ambient Tap
Carry out checks and actions
as for ambient tap.
Chiller tank frozen – Faulty
Thermostat/Incorrect Setting
Thaw out and check thermostat.
Replace thermostat or reset
temperature set point.
Chiller tank Frozen-faulty
tank pump
Thaw out and check operation.
Replace Air pump if necessary.
Summary of Contents for u1
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