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SERVICE (cont.)
Electronic Control Assembly Troubleshooting:
Check these items first
• Is circuit board popped out of bracket?
• Is circuit board wet due to misaligned overflow
tube?
• Is water in overflow cup activating float switch?
• Is overflow cup not making good contact with tank?
• Is dispenser being operated with panels removed?
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Triac Assy
Electronic
Control
P1991
FIG. 1 ELECTRONIC CONTROL AND TRIAC
Location:
The electronic control assembly is located inside
the side 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
and to the triac assembly located on the inside of the
rear wall.
General:
This system controls the liquid level and water tem-
perature of the dispenser. These two functions act in-
dependently of each other and should be tested sepa-
rately.
Voltage present at
Solenoid Valve
?
Voltage present at
Solenoid Valve
?
Overflow Cup Full
?
Remove Power
Disconnect Level Probe
Retry
Drain cup
No
Ye s
Ye s
Ye s
Ye s
No
No
No
H10X LIQUID LEVEL CONTROL
PROBLEM: Does Not Refill
Does Water Flow
?
Replace Probe
Replace Control Assembly
Replace Solenoid Valve
Unplug P2 from Circuit Board
Repair shorted wires
leading to P2.
Overflow
?
Overflow
?
Retry
Drain cup
Ye s
Ye s
No
H10X LIQUID LEVEL CONTROL
PROBLEM: Overflows
Unplug P2 from Circuit Board
Retry
Retry
Drain cup
Drain cup
Short Probe Wire
To Chassis
Disconnect wire from
Refill Probe
Disconnect Wire From
Solenoid Valve
Repair shorted wires
leading to P2
No
Replace Probe
Overflow
?
Ye s
Replace Control Assembly
No
Replace Solenoid Valve
10889 091599