Bunn DV, H5X SERVICE Electronic Controls, Control Board, b ELECTRONIC CONTROL, Board And Triac

Models: DV H5E H5X

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SERVICE

SERVICE

Electronic Controls

Liquid Level Control Flow Charts

H5E, H5X LIQUID LEVEL CONTROL

PROBLEM: Does Not Refill

H 5

Overflow Cup Full

Yes

 

 

 

?

 

 

 

 

No

 

 

 

 

 

 

 

 

Disconnect Level Probe

 

 

 

 

 

 

 

 

Voltage present at

 

Yes

Solenoid Valve

 

 

 

?

 

 

 

 

No

 

 

 

 

 

 

 

Remove Power

Drain cup

Retry

Does Water Flow

?

No

Yes

Replace Probe

P4093.35

FIG. 8a ELECTRONIC CONTROL

Unplug Ready Lamp

 

 

 

 

 

 

 

 

Yes

Voltage present at

Solenoid Valve

 

 

?

 

 

Replace Solenoid Valve

Replace Ready Lamp

Triac Assy

No

Replace Control Board

H5E, H5X LIQUID LEVEL CONTROL

Electronic

Control Board

%811

H 10

P1991-1.30

FIG. 8b ELECTRONIC CONTROL

BOARD AND TRIAC

PROBLEM: Overflows

Drain cup

Unplug Ready Lamp

Retry

 

Overflow

No

 

?

 

H5E, H5X LIQUID LEVEL CONTROL Yes

Drain cup

Disconnect Probe

Wire From Probe

Short Probe Wire

To Chassis

Retry

Replace Ready Lamp

Location:

The electronic control board is located inside the rear of the dispenser. Access will also be needed to the temperature sensor, overflow tube temperature sensor, and liquid level probe located on the tank lid.

General:

This system controls the liquid level and water temperature of the dispenser. These two functions act independently of each other and should be tested separately.

Overflow

No

?

 

Yes

 

 

 

Drain cup

 

 

 

Disconnect Wire From

 

Solenoid Valve

 

Retry

 

 

Yes

Overflow

?

 

No

 

 

 

Replace Control Board

 

 

 

Replace Probe

Replace Solenoid Valve

8

42311 071310

 

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Bunn DV SERVICE Electronic Controls, Control Board, b ELECTRONIC CONTROL, Board And Triac, Triac Assy, PROBLEM Overflows