Manitowoc Ice S1800 service manual Section Electrical System, Energized Parts Charts

Section 6 Electrical System

Section 6

Electrical System

Energized Parts Charts

SELF-CONTAINED WATER-COOLED MODELS

			Control Board Relays					Contactor
Ice Making	1	2	3	4	5	6	7	7A	7B	Length
Sequence Of		Harvest	Harvest		Water				Cond.
	Water			Air		Dump	Contactor			Of Time
Operation		Valve	Valve		Inlet			Comp.	Fan
	Pump			Comp.*		Valve	Coil
		(Left)	(Right)*		Valve				Motor
				35 sec.
START-UP 1			On	Off
	On	On	(when		Off	On	Off	Off	Off	45 Seconds
1. Water Purge
			used)	10 sec.
				On
2. Refrigeration	Off	On	Off	Off	On	Off	On	On	Off	5 Seconds
System Start-Up
FREEZE					May					Initial Start-Up
					Cycle				May Cycle	is 60 Seconds
SEQUENCE	Off	Off	Off	Off		Off	On	On
					On/Off				On/Off	30 Seconds
3. Pre-Chill
					during					thereafter
					the first
					45 sec.					Until 10 sec.
					Cycles				May Cycle	water contact
4. Freeze	On	Off	Off	Off		Off	On	On		with ice
					Off, then				On/Off
										thickness
					On one
										probe
					more
					time
HARVEST					30 sec.
				On; after	Off,				May Cycle	Factory-set at
SEQUENCE	On	On	On			On	On	On
				35 sec.	15 sec.				On/Off	45 Seconds
5. Water Purge
					On
6. Harvest	Off	On	On	On	Off	Off	On	On	May Cycle	Bin switch
									On/Off	activation
										Until bin
7. AUTOMATIC	Off	Off	Off	Off	Off	Off	Off	Off	Off	switch
SHUT-OFF										re-closes &
										3 min. delay

1.Initial Start-Up or Start-Up After Automatic Shut-Off * Not Used on all Models

Condenser Fan Motor

The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.

Harvest Water Purge

The circuit board has an adjustable water purge in the harvest cycle. This permits a 0 or 45 second purge cycle.

Auto Shut-Off

The ice machine remains off for 3 minutes before it can automatically restart. The ice machine restarts (steps 1-2) immediately after the delay period, if the bin switch re-closes prior to 3 minutes.

Safety Timers

The control board has the following non-adjustable safety timers:

•The ice machine is locked into the freeze cycle for 6 minutes, before a harvest sequence can be initiated. The freeze lock is bypassed when the toggle switch is moved from the OFF to ICE position on the first cycle only.

•The maximum freeze time is 60 minutes, at which time the control board automatically initiates a harvest sequence (steps 5-6).

•The maximum harvest time is 3-1/2 minutes, at which time the control board automatically terminates the harvest sequence. If the bin switch is open, the ice machine will go to automatic shut-off (step 7). If the bin switch is closed, the ice machine will go to the freeze sequence (steps 3-4).

Part Number 80-1634-3 6-1