Bunn ITB/ITCB Manual De Usuario

13

Location:
The brew valve is located inside the top cover behind 
the front face plate.

Test Procedures:
1.    Refer to the Programing Section for Service Tools/
Test Outputs/Brew Valve.
2.   Be sure brew funnel & server are in place before 
activating valve.
3.  Check the valve for coil action. Turn on the valve 
with the test mode. Listen carefully in the vicinity of 
the brew valve for a click as the coil pulls  the plunger 
in.
If no sound is heard as described, proceed to 
#4. 
If the sound is heard as described, there may be 
a blockage in the valve , hose, tank, or sprayhead. 
Disconnect the brewer from the power source. 
Remove the valve and inspect for blockage, and 
de-lime all related areas.
4.  Connect the voltmeter leads to the coil terminals. 
Turn on the valve with the test mode. 
The indication will be 2-3VAC off, 120VAC on. Set 
the meter to DC volts. The indication should be 150-
160VDC when off, 0V when on. If the polarity of meter 
leads are reversed,  reading will indicate -150-160VDC. 
(Double these readings for 240 volt coils)

If voltage is present as described, but no coil action is 

observed, brew valve is defective. Replace valve and 
test again to verify repair.
If voltage is not present as described, refer to Wir-
ing Diagrams and check the brewer wiring harness. 
Also check the control board and switch for proper 
operation.

Removal and Replacement:
1.  Disconnect the brewer from the power source.
2.   Disconnect wires from the valve.
3.  Drain enough water from the tank so the water 
level is below the outlet.
4.  Remove hoses from the valve.
5.  Remove the two #8-32 nuts securing the valve to 
the sprayhead panel.
6.  Install new valve using the two #8-32 nuts.
7.  Reconnect hoses to the valve and secure in place 
with clamps.

42461 0911809