Bunn System III Operating & Service Manual page 12

Bunn coffeemaker operating & service manual
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TROUBLESHOOTING (cont.)
Problem
Weak beverage (cont.)
Brewer is making unusual noises.
Temperature on the DBC display
varies.
Probable Cause
3. Sprayhead
4. Funnel loading
5. Water temperature
1. Solenoid (Inlet)
2. Plumbing lines
3. Water supply
4. Tank heater
5. Contactor
1. Digital brewer control
Page 12
Remedy
B.O.M. sprayhead #01082.0002
should be used to properly wet the
bed of ground coffee in the funnel.
®
The BUNN
paper filter should be
centered in the funnel and the bed of
ground coffee leveled by gentle shak-
ing.
Empty the server, remove its cover,
and place the server on the warmer.
Place empty funnel over the server
entrance, with ON/OFF switch in the
"ON" (upper) position press the start
switch and release it. Check the wa-
ter temperature immediately below
the sprayhead with a thermometer.
The reading should not be less than
195˚F (91˚C).
The nut on back of the solenoid must
be tight or it will vibrate during op-
eration
Plumbing lines should not be rest-
ing on the counter top.
(A) The brewer must be connected
to a cold water line.
(B) Water pressure to the brewer
must not be higher than 90 psi (620
kPa). Install a regulator if necessary
to lower the working pressure to
approximately 50 psi (345 kPa).
Remove and clean lime off the tank
heater.
Check for low voltage.
Refer to Service - Digital brewer
control for testing procedures. See
page 22 step 6
27362 092900

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