Synesso Espresso Machine

Technical Manual 30
● Water lter may be clogged and should be changed
No Brew Pressure,
Pump Motor is Not
Running
● Check that the pump reset button on the face of the control box (white
button with “10” on it) is not tripped (popped out).
● Check the pump switch in the group top to make sure it is engaging and
has not failed. See Brew Switch Adjustment
● Check that the pump relay in the electrical box functions correctly.
No Water Flow
While Pump is on
● Check in the group top that the brew solenoid switch is engaging and
has not failed. See Brew Switch Adjustment section for more info.
● Brew Solenoid is stuck closed (may be caused by soap residue not fully
ushed after cleaning).
● Brew Solenoid coil may have failed. Check that coil magnetizes when
group is in preinfuse and brew positions.
● Jet may be plugged. See Jet Clearing Procedure
● Water lter may be plugged. Check and Replace if necessary.
Slow Water Flow
(more than 10
seconds to pour 2
ounces of water)
● Debris is stuck in the water ow restrictor jet. See Jet Cleaning Proce-
dure.
● Water lter may be clogged and should be changed
Brew Gauge Flut-
ters or Vibrates
● Water is in the gauge or tube. Remove the gauge and tube, blow out
the water, and reinstall. Machines made after #240 use a thinner, longer
gauge tube which eliminates utter. If your machine is made before #240
and this issue becomes unacceptable, contact your dealer, service pro-
vider, or the Synesso factory to purchase a retrot tube.
Brew Tem-
perature
Readout for Brew
Water Temperature
Varies by a Few
Degrees
● The control must detect a temperature one increment (0.5°F on original
machines, or 0.1°F on current machines) above the set point before it
sends a signal to turn off the heating element. This will allow the elec-
tronics to show a reading just above the set point. The energy from the
heating element and the tube for the preheated incoming water are within
1” (25mm) from the location of the temperature probe in the brew tank.
The pick up tube for brew water is at the top of the brew group and is in
the most temperature stable water in the tank. The readout can show a
temperature of a few degrees above your set point, but your brew water
is actually at the set point.
Brew Temperature
Reads Low
Be sure to allow 20 - 40 minutes from the time the machine is powered up
as the temperatures need to stabilize. Ambient temperature and airow
can change how quickly the machine reaches stablility.
Check that the element breaker is in the ON position
Check that the fuse on the power board, as well as the relay, are both
functioning properly.
Check that the brew tank thermal overload switch has not been tripped
Check that the connection to the temperature probe is intact and secure.
Make sure the set point has not been changed.
TROUBLESHOOTING