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SERVICE (cont.)
Electronic Controls
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.
Liquid Level Control Flow Charts
FIG. 1 ELECTRONIC CONTROL
P1772
Voltage present at
Solenoid Valve
?
Voltage present at
Solenoid Valve
?
Overflow Cup Full
?
Remove Power
Disconnect Level Probe
Retry
Drain cup
No
Y es
Y es
Y es
Y es
No
No
No
H5E, H5X LIQUID LEVEL CONTROL
PROBLEM: Does Not Refill
Does Water Flow
?
Replace Probe
Unplug Ready Lamp
Replace Ready Lamp
Replace Control Board
Replace Solenoid Va lve
Overflow
?
Overflow
?
Retry
Drain cup
Y es
Y es
No
H5E, H5X LIQUID LEVEL CONTROL
PROBLEM: Overflows
Unplug Ready Lamp
Retry
Retry
Drain cup
Drain cup
Short Probe Wire
To Chassis
Disconnect Probe
Wire From Probe
Disconnect Wire From
Solenoid Valve
Replace Ready Lamp
No
Replace Probe
Overflow
?
Y es
Replace Control Board
No
Replace Solenoid Valve
10420.1 040309