5. FLOAT SWITCH
[a] EXPLANATION OF OPERATION
The float operates 2 switches within the float switch. The lower switch (black and blue wires) is used for low water safety protection, initiating the freeze cycle refill and terminating the freeze cycle. The upper switch (black and red wires) is used to terminate the freeze cycle refill only. Refill will last until the upper float switch closes or the 1 minute countdown timer ends, whichever comes first.
[b] CLEANING
Depending on local water conditions, scale may build up on the float, float switch shaft and inside the housing. Scale on the float or shaft can cause the float to stick causing erratic operation. The float switch should be cleaned and checked before replacing.
First, disconnect the float switch connector from the control box and remove the water tank and pump motor bracket together from the icemaker. Twist the mechanical lock inside of the pump motor bracket and remove the float switch. See "V. 15. FLOAT SWITCH." Remove the retainer clip from the shaft and slide the float off the shaft. Soak the switch assembly in ice machine cleaner. Wipe down the shaft, float, housing with cleaning solution. See "VI.
CLEANING AND MAINTENANCE INSTRUCTIONS."
[c] FLOAT SWITCH CHECK PROCEDURE
Before replacing a float switch that you suspect is bad, make sure the float switch has been cleaned. This procedure will help you verify your diagnosis. The float switch has three wires. The black wire is common. The blue wire is for the lower float switch contact and the red wire is for the upper float switch contact.
1)Disconnect the black float switch connector from the control box.
2)Drain the reservoir water.
3)Turn the control switch to "ICE".
4)As water fills the reservoir, the float switch contacts should close. Check continuity of the lower float switch contacts using the black and blue wires and the upper float switch contacts using the black and red wires. With the float positioned all the way up, both float switch contacts should be closed. If either float switch contact fails, the assembly should be replaced.
5)Turn the control switch to "OFF".
6)Drain the reservoir water.
7)As water drains, the float switch contacts should open. Check continuity of the upper float switch contacts using the black and red wires and the lower float switch contacts using the black and blue wires. With the float positioned all the way down, both float switch contacts should be open. If either float switch contact fails, the assembly should be replaced.
8)Reconnect the black connector to the control box when finished.
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