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Page 8

TROUBLESHOOTING (cont.)

Brew cycle will not start (cont.)

Water is not hot

PROBABLE CAUSE

REMEDY

Refer to 

Service

 - ON/OFF Switch

for testing. See page 16

Refer to 

Service 

- Start Switch for

testing procedures. See page 18

Refer to

 Service

 - Timer for testing

procedures. See page 20 or 21

Refer to 

Service

 - Solenoid Valve

for testing procedures. See page
17

(A) Direction of flow arrow must
be pointing towards brewer.

(B) Remove the flow control and
check  for  obstructions.  Clear  or
replace.

(A) Direction of flow arrow must
be pointing towards brewer.

(B) Remove strainer and check for
obstructions. Clear or replace.

Refer to 

Service

 - Limit Thermo-

stat  for  testing  procedures.  See
page 15

Refer  to 

Service 

-  Control  Ther-

mostat for testing procedures. See
page 14

Refer to 

Service 

- Tank Heater for

testing procedures. See page19

3. ON/OFF Switch

4. Start Switch

5. Timer

6. Solenoid Valve

7. Water flow control (.222 GPM)

8. Water strainer

1. Limit Thermostat

CAUTION  - 

Do  not  eliminate  or

bypass limit thermostat. Use only
BOM replacement #29329.1000

2. Control Thermostat

3. Tank Heater

PROBLEM

27479 121500

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Summary of Contents for GMB-PS

Page 1: ...E D BO ILED DR Y HE AT ED WHE N EM PT Y US ED ON HIGH FL AM E OR EX PO SE D EL EC TR IC EL EM EN TS FA ILURE TO COMPL Y RISKS INJU RY PN 658 198 5 BU NN O MA TIC CO RP OR AT ION FU NNEL CONTE NTS ARE...

Page 2: ...Y OR FITNESS FOR A PARTICULAR PURPOSE The agents dealers or employees of Bunn are not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn Accord...

Page 3: ...ED ON HIGH FLAME OR EXPOSED ELECTRIC ELEMENTS READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODUCT FAILURE TO COMPLY RISKS INJURY PN 00658 0000F 6 98 1985 BUNN O MATIC CORPORATION 00831 0000F 3...

Page 4: ...REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi 138 and620kPa froma1 2 orlargersupplyline Ashut offvalveshouldbeinstalledinthelinebefore...

Page 5: ...opped flowing from the funnel and let the water in the tank reheat to the proper temperature 7 Placethe ON OFF switchinthe ON upperposition andmomentarilypressandreleasethestartswitch Check the water...

Page 6: ...ng to be done until switch is once again placed in the SET position OPERATING CONTROLS ON OFF SWITCH Placing the ON OFF switch in the OFF lower position stops brewing Stopping a brew cycle after it ha...

Page 7: ...edorloosened Thiswillhelp to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated This brewer is heated at all times...

Page 8: ...ions Clear or replace A Direction of flow arrow must be pointing towards brewer B Removestrainerandcheckfor obstructions Clear or replace Refer to Service Limit Thermo stat for testing procedures See...

Page 9: ...row must be pointing towards the brewer B Remove the flow control and check for obstructions Clear or replace A Direction of flow arrow must be pointing towards the brewer B Removethestrainerandcheck...

Page 10: ...er condi tions Excessive mineral build up on stainless steel surfaces can ini tiate corrosive reactions resulting in serious leaks 3 Solenoid Valve 1 Timer REMEDY A Direction of flow arrow must be poi...

Page 11: ...and clear any obstructions Rebuild or replace the valve if necessary See page 17 BUNN paperfiltersmustbeused for proper extraction A fine or drip grind must be used for proper extraction Aseven holest...

Page 12: ...ofgroundsleveledbygentlyshak ing The nut on the solenoid must be tight or it will vibrate during op eration Plumbing lines should not resting on the counter top A Thebrewermustbeconnected to a cold wa...

Page 13: ...Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel The brewer should be unplugged when servicing except when electrical tests are re quired...

Page 14: ...2267 P1171 27479 091596 to the power source The indication must be a 120 volts ac for two wire 120 volt models three wire 120 208 and 120 240 volt models b 200 to 240 volts ac for two wire 200 volt or...

Page 15: ...s operating properly If continuity is not present as described replace the limit thermostat P2267 P1800 BLU BLK Lead to Control Thermo stat BLK to Power Cord or Terminal Block Black Insert 27479 12150...

Page 16: ...rewer wiring har ness 5 With the black wire removed remove the white red wire from the lower terminal 6 Check for continuity across the center and lower terminal with the switch in the ON position Con...

Page 17: ...noid valve for a clicking sound as the coil magnet attracts 7 Disconnect the brewer from the power source If the sound is heard as described and water will not pass through the solenoid valve there ma...

Page 18: ...he white orange wire to the top terminal and the white yellow wire to the bottom terminal If continuity is not present as described replace the switch ON OF F ST AR T N operating pressure Control 2422...

Page 19: ...P1176 27479 121500 FIG 13 TANK HEATER TERMINALS Removal and Replacement 1 Shut off water supply to the brewer 2 Disconnect the water supply tubes on the tank lid for the tank and the faucet coil asse...

Page 20: ...d proceed to 7 If voltage is not present as described refer to Wiring Diagrams and check the brewer wiring harness MI NU TE S BU NN O M AT IC P N 26 20 12 0 VA C ON OF F ST AR T P1170 P1177 27479 1215...

Page 21: ...r source and replace the timer 7 With a voltmeter check the voltage across termi nals TL1 and TL4 when the ON OFF switch is in the ON position Connectthebrewertothepower source and press the START swi...

Page 22: ...d Place the ON OFF switch in the ON position press and hold the START switch until three distinct clicks are heard and then release the switch Failure to release the switch within two seconds after th...

Page 23: ...Page 23 27479 091596 All manuals and user guides at all guides com...

Page 24: ...Page 24 27479 091596 All manuals and user guides at all guides com...

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