Bunn CWTF TWIN Guía Del Usuario

Page 18

FIG. 8 RECOVERY BOOSTER RELAY

P2197

Location
 

The recovery boosters are located inside the trunk 

on the center of the component brackets just above 
the solenoid valve.

Test Procedures
1.  Disconnect the brewer from the power source.
2.  Disconnect the white and black wires from the coil 

of the recovery booster relay.

3.  With a voltmeter, check the voltage across the 

white  and the black wires. Connect the brewer 
to the power source and initate a brew cycle. The 
indication must be 120 volts ac.

4.   Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to Wiring 
Diagrams and check the brewer wiring harness.

5.   Check the continuity across the recovery booster 

relay coil terminals.

If continuity is present as described, reconnect the 
white and black wires to the coil.
If continuity is not present as described, replace the 
recovery booster relay.

6.  Disconnect the blue and black wires from the relay 

contact terminals. Connect the brewer to the power 
source. With the "ON/OFF" switch in the "ON" po-

sition and the start switch pressed and released, 
check for continuity across relay terminals.

7.  Disconnect the brewer from the power source. 

If continuity is present as described, reconnect the blue 
and black wires to the relay contact terminals.
If continuity is not present as described replace the 
relay.

Removal and Replacement:
1.  Remove all wires from the recovery booster re-

lay.

2.  Remove the two #8-32 screws securing the relay 

mounting bracket to the component bracket. Re-
move relay bracket and relay as an assembly.

3.  Remove the one #6-32 screw securing the relay 

to the relay mounting bracket.

4.  Using one #6-32 screw install new relay on relay 

mounting bracket.

5.  Using two #8-32 screws install relay and bracket 

to the component bracket.

6.  Refer to Fig. 9  when reconnecting the wires.

B

9

6

3

A

7

4

1

B

9

6

3

A

7

4

1

K1-B WHI to Left
Brew Solenoid Terminal
   K1-A BLK to Left
   Brew Solenoid Terminal
       K1-7 BLU to Control 
       Thermostat
           K1-4 BLK to Control
           Thermostat

K2-B WHI to Right
Brew Solenoid Terminal
   K2-A BLK to Right
   Brew Solenoid Terminal
       K2-7 BLU to Control 
       Thermostat
           K2-4 BLK to Control
           Thermostat

LEFT

RIGHT

FIG. 9 RECOVERY BOOSTER RELAY 

TERMINALS

P1235

10737 120800