TROUBLESHOOTING (cont.)

PROBLEM

PROBABLE CAUSE

REMEDY

Brew cycle will not start (cont)

2.No power or incorrect voltage to the brewer (cont)

(A4) Check the terminal block for

440 volts ac across the black and blue terminals, black and red termi- nals and the red and blue terminals on four wire three phase 440 volt models.

(B)Check circuit breakers or fuses.

3.Water level below pump housing. (Water level in the hot water gauge glass should be approximately half full).

Be sure water shut-off valve is open and that the in-line filters or strain- ers are not blocking water flow. (Do not confuse water shut-off valve with the manual fill and drain valve underneath the brewer).

Brew cycle starts with brew lockout relay engaged.

4.

ON/OFF Switch

Refer to Service - ON/OFF Switch for

 

 

testing. See page 22

5.

Start Switch

Refer to Service - Start Switches for

 

 

testing procedures. See page 29

6.

Relay

Refer to Service - Relay for testing

 

 

procedures. See page 24

7.

Timer

Refer to Service - Timer for testing

 

 

procedures. See page 31 or 33

8.

Pump

Refer to Service - Pump for testing

 

 

procedures. See page 23

9.

Solenoid Valve

Refer to Service - Solenoid Valve for

 

 

testing procedures. See page 27

10. Strainer

(A) Direction of flow arrow must be

 

 

pointing towards brewer.

 

 

(B) Remove the strainer and check

 

 

for obstructions. Clear or replace.

1.

Relay

Refer to Service - Relay for testing

 

 

procedures. See page 24

Page 9

10060

080900

 

Page 9
Image 9
Bunn U3A service manual Troubleshooting

U3A, U3 specifications

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