SERVICE

This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

WARNING - 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 and the test procedure specifically states to plug in the brewer.

COMPONENT ACCESS

WARNING - Disconnect the brewer from the power source before the removal of any panel or the replace- ment of any component.

All components are accessible by the removal of the swing spout, front cupola cover, rear cupola cover and the cupola.

Disconnect the swing spout nut from the swing spout base fitting. Remove swing spout.

Remove the four #8-32 screws, two on the front and rear, securing front and rear cupola covers to the cupola.

Slip cupola off of the component bracket.

Contents

 

Circuit Breaker

14

Contactor

15

Control Thermostat

17

Fuse and Fuse Holder

18

Limit Thermostat

19

Liquid Level Board and Level Probe

20

ON/OFF Switch

22

Pump

23

Relay

24

Selector Switch (Half Batch)

26

Solenoid

27

Start Switch (Brew)

29

Tank Heater(s)

30

Thermal Cut-off

31

Timer (Early Models)

31

Digital Timer (Late Models)

33

Transformer

35

Master ON/OFF Switch (Late Models)

36

Wiring Diagrams

37 thru 42

FIG. 1 COMPONENT ACCESS

P1317.30

 

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10060

011708

 

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Bunn U3A service manual Service, Component Access, Contents

U3A, U3 specifications

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