Manitowoc Ice QF0800, QF2300, QC0700 Electrical System, Section, 6-54, WATER FLOAT VALVE Function

Electrical System Section 6

WATER FLOAT VALVE

Function

The float valve maintains correct water level during the Freeze cycle.

It allows the evaporator to drain completely during the Automatic Shut-Off cycle.

Check Procedure

1.Verify water is supplied to the float valve, the water inlet screen is clean, and the float and float arm are free moving.

2.Refer to the Energized Parts Chart and verify the following:

•The float valve coil should be energized.

•The red water valve LED on the control board is energized.

3.Check for line voltage at float valve coil. This test must be performed within 90 seconds of the water float valve energizing. If no water contacts the water level probes within 90 seconds, the valve will de- energize.

Step 3 Check for Line Voltage

Voltage Reading	Result
	Replace Solenoid Coil
Line Voltage	or
	Replace Valve
	See
No Voltage	“Control Board Relays”
	for further diagnostics.

WATER LEVEL CHECK

The float valve maintains the correct water level. The water level must allow the water level probes to maintain water contact throughout the Freeze cycle. The water level is factory set and normally will not require adjustment. Check the water level during the Freeze cycle. The water level is correct if the Water Level indicator light is energized and no water is entering the overflow tube. (Check for overflow water exiting the ice machine drain line at the floor drain.)

If adjustments are necessary:

A.Rotate float clockwise to increase water level.

B.Rotate float counterclockwise to decrease water level.

Verify the outlet for the water float valve is at a 20° to 30° angle to prevent contact with the float.

	WATER FLOAT
	VALVE SOLENOID
	COIL
VERIFY WATER
OUTLET DOES	WATER FLOAT
NOT POINT	VALVE
STRAIGHT DOWN;
IT MAY
INTERFERE WITH
FLOAT.

WATER LEVEL

PROBE

WATER FLOAT

ROTATE TO

ADJUST WATER

LEVEL.

6-54 Revised 8/2003 Part No. 80-1214-3