Manitowoc Ice QM45 Series service manual QM45 SELF-CONTAINED AIR Cooled Models

Section 3 Ice Machine Operation

QM45 SELF-CONTAINED AIR COOLED MODELS

ICE MAKING SEQUENCE OF OPERATION

		CONTROL BOARD RELAYS				RELAY
	1		2	3	3A		3B *	LENGTH
	WATER PUMP		HOT GAS	RELAY COIL	COMPRESSOR		CONDENSER	of “ON” TIME
			VALVE				FAN MOTOR
INITIAL
START-UP/or								15
START UP
AFTER	OFF		ON	OFF	OFF		OFF	Seconds
AUTO SHUT-
OFF:
1. Pressure
Equalization
2. Refrigeration								5
System Start-up	OFF		ON	ON	ON		ON	Seconds
FREEZE								30
SEQUENCE:
3. Pre-Chill	OFF		OFF	ON	ON		ON	Seconds
								Until 7 sec.
4. Freeze								water contact
	ON		OFF	ON	ON		ON	with ice
								thickness
								probe
HARVEST
SEQUENCE:	OFF		ON	ON	ON		ON	Bin switch
5. Harvest								activation
								Until
6. AUTO SHUT-								bin switch
OFF	OFF		OFF	OFF	OFF		OFF	re-closes
Condenser Fan Motor:		The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.

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