Bunn S 用户指南

Page 27

P1599

FIG. 19 LIQUID LEVEL CONTROL

BOARD TERMINALS

BLU to Relay 2
WHI/RED to Relay 5 and Timer TL1
WHI to Timer TL2
PNK to Probe

29251 052500

If voltage is present as described, the level control
board is operating properly, proceed to #11.
If voltage is not present as described, replace the level
control board.

11. Reconnect the pink wire to terminal 4.
12. Gently  pull  the  probe  out  of  the  tank  lid  and

inspect for corrosion. Replace it if necessary.

13. Place the probe so that neither end is in contact

with any metal surface of the brewer.

14. Check the voltage across terminals 1 & 3 with a

voltmeter.  Connect  the  brewer  to  the  power
source.  Turn  the  "ON/OFF"  switch  to  the  "ON"
position. The indication must be:
a.) 120 volts ac for three wire 120/208 volt mod-
els and three wire 120/240 volt models after a
delay of approximately 5 seconds.
b.) 200 to 240 volts ac for two wire 200 or 240
volt  models  after  a  delay  of  approximately  5
seconds.

15. Move the probe's flat end to the brewer housing.

The indication must be 0.

16. Move the probe's flat  end away from the brewer

housing. The indication should again be:
a.)  120  volts  ac  for  three  wire  120/208  volt
models and three wire 120/240 volt models.
b.) 200 to 240 volts ac for two wire 200 or 240
volt models.

17. Disconnect the brewer from the power source.

If voltage is present as described, reinstall the probe,
the level control board and level probe are operating
properly.
If voltage is not present as described, check the pink
probe wire.

Removal and Replacement:
1.

Remove all wires from the level control board.

2.

Remove  two  #8-32  screws  and  lockwashers
holding level control board to component bracket.

3.

Install  the  new  level  control  board  to  the
component  bracket.  Make  certain  that  the
lockwashers are between the level control board
and the component bracket.

4.

Refer to FIG. 19 when reconnecting the wires.