Manitowoc Ice QF2200, QF2300, QF0800, QC0700 Electrical System, Section, Energized Parts Charts

Electrical System										Section 6
Energized Parts Charts
QF2200
Ice Making		Control Relays					Sensors
	1		2	3	4					Length
Sequence						Water			Gear
							Bin Level	Temperature
	Liquid Line				Float
Of			Dump	Gear		Level			Motor	Of Time
	Solenoid				Valve		Probe	Sensor
Operation			Valve	Motor		Probe			Speed
	Valve				Coil
START-UP						Not		Not Sensing	Sensing
							Sensing No		for Gear
1A. Water	Off		On	On	Off	Sensing for		for		45 Seconds
							Ice Contact		Motor
Flush						Water Level		Temperature
									Speed
								Not Sensing	Sensing	Until Water
1B. Water						Sensing for	Sensing No		for Gear	Contacts
	Off		Off	On	On			for
Fill						Water Level	Ice Contact		Motor	Water Level
								Temperature
									Speed	Probe
								Sensing for		Until Ice
								123°F
									Sensing	Contacts Bin
FREEZE								Immediately.
						Sensing for	Sensing No		for Gear	Level Probe
SEQUENCE	On		Off	On	On			Sensing for
						Water Level	Ice Contact		Motor	for 30
2. Freeze								30°F after 30
									Speed	Continuous
								min. of Ice
										Seconds
								Making
AUTOMATIC								Not Sensing	Sensing
SHUT-OFF						Sensing for	Sensing		for Gear
	Off		Off	On	On			for		4 Minutes
3A. Ice Run						Water Level	Ice Contact		Motor
								Temperature
Out									Speed
									Not
3B. Drain	Off		On	Off	Off	Not	Sensing	Not Sensing	Sensing	90 Seconds
						Sensing for		for	for Gear
Evaporator							Ice Contact
						Water Level		Temperature	Motor
									Speed
									Not	Until Ice No
						Not		Not Sensing	Sensing
AUTOMATIC							Sensing			Longer
	Off		Off	Off	Off	Sensing for		for	for Gear
SHUT-OFF							Ice Contact			Contacts Bin
						Water Level		Temperature	Motor
									Speed	Level Probe

*After the liquid line solenoid valve energizes, the suction pressure will rise above the low-pressure switch cut-in (22 psig) and the compressor and condenser fan motor energize. The condenser fan motor remains energized during the entire freeze cycle, the head pressure control valve con- trols the discharge pressure.

When the toggle switch is placed in the ICE position, the following must occur prior to starting an ice making cycle.

A.)The bin level probe must be open (Bin Level light off). If the probe is closed (Bin Level light on) when the toggle switch is moved to ICE, the control system waits until the bin level probe opens (Bin Level light off) before starting an ice making sequence.

If the bin level probe is disconnected from the control board, the ice machine will not start and will continuously flash the Bin Level light. The ice machine will remain off until:

1.The bin level probe is reconnected to the circuit board

2.The toggle switch is moved from ICE to OFF, then back to ICE.

B. The water level probe must be closed (Water Level light on) to start the compressor.

If the water level probe is open (Water Level light off), the control system waits until the water level probe closes before starting the compressor.

8-Minute Lockout - The Bin Level light will flash until the 8-minute lockout expires. After the 8-minute lockout expires, the Bin Level light will de-energize.

The 8-minute lockout time can be overridden by moving the ICE/OFF/CLEAN toggle switch from ICE to OFF, then back to ICE.

6-2 Revised 8/2003 Part No. 80-1214-3