Bunn OT Service Manual download pdf (Page 11)

Page 11

TROUBLESHOOTING (cont.)

Problem

Beverage overflows decanter.

Weak beverage.

Brewer is making unusual noises.

Probable Cause

1. Beverage left in decanter

1. Type of paper filters

2. Coffee

3. Sprayhead

4. Funnel loading

5. Water temperature

1. Solenoid Valve

2. Plumbing lines

3. Water supply

Remedy

The brew cycle should be started

only with an empty decanter under

the funnel.

BUNN® paper filters should be used

for proper extraction.

A sufficient quantity of fine or drip

grind coffee should be used for

proper extraction.

B.O.M. sprayhead #01082.0000

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 coffee leveled by gentle shaking.

Place a funnel over an empty de-

canter on the warmer beneath the

sprayhead. Place the On/Off brew

station warmer switch in the upper

position, press the start switch, and

check the water temperature imme-

diately below the sprayhead with an

accurate thermometer. The reading

should not be less than 195° F. Ad-

just the control thermostat slightly

clockwise to increase the water tem-

perature.

The nut on top of the solenoid valve

must be tight or it will vibrate dur-

ing operation.

Plumbing lines should not rest 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 ap-

proximately 50 psi (345 kPa).

10021 071700

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