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TROUBLESHOOTING GUIDE
Brew Gauge
Brew Pressure Gauge Needle Value Changes Oen:
• This is normal. The lowest number (usually 3-5 bar) reects the incoming line pressure. When brewing
the needle reects brew pressure (8.5-9 bar). When the brew tanks heat, the water expands and the ex-
pansion valve relieves the pressure at 11 or 12 Bar.
Brew Gauge Needle Fluers or Vibrates:
• Water is in the gauge or tube.
• Pump is failing
• Gauge is failing
Brew Pressure is Low:
• When brewing on one group and another group is acvated, some water will be diverted to the second
(or third) group. This will slightly reduce available brew pressure.
• Expansion valve may be set too loose. Check that the pressure in the brew system reaches 10-12 bar
while heang from a cold state. If the pressure does not exceed brew pressure, the expansion valve will
need to be ghtened.
• Check pump to make sure pressure is properly set.
• Water supply hose to the pump is kinked.
• Water lter is plugged. Check and replace if necessary.
• Brew valves are worn and water is being diverted to the discharge (drain). Look for error VMUF0#.
Brew Pressure is High (above 12 bar) While Machine is Idle:
• The expansion valve needs to be adjusted. The valve should be set so that maximum pressure is 11-12
bar.
• The gauge has lost calibraon.
No Brew Pressure; Pump/Motor Runs:
• Brew Solenoid is stuck (can be caused by soap residue not fully ushed aer cleaning).
• Brew Solenoid has failed.
• The line between the pump and the water supply has collapsed or is kinked.
• The line to the pump is kinked.
• Water lter is plugged. Check and replace if necessary.
• Water supply is inadequate.
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