Manitowoc Ice QF0400, QF2300 Section Electrical System, Energized Parts Charts, QF400/QC700/QF800

Section 6

Electrical System

Energized Parts Charts

QF400/QC700/QF800

	Control Relays					Sensors
Ice Making	1	2	3	4	Water			Gear	Length
Sequence Of						Bin Level	Temperature
				Float
	Contactor	Dump	Gear		Level			Motor	Of Time
Operation				Valve		Probe	Sensor
	Coil	Valve	Motor		Probe			Speed
				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
					Sensing for	Sensing No		for Gear	Contacts
1B. Water Fill	Off	Off	On	On			for
					Water Level	Ice Contact		Motor	Water Level
							Temperature
								Speed	Probe
							Sensing for
							245°F	Sensing	Until Ice
FREEZE							Immediately.		Contacts Bin
					Sensing for	Sensing No		for Gear
SEQUENCE	On	Off	On	On			Sensing for		Level Probe for
					Water Level	Ice Contact		Motor
2. Freeze							155°F after 30		30 Continuous
							min. of Ice	Speed	Seconds
							Making
AUTOMATIC							Not Sensing	Sensing
SHUT-OFF					Sensing for	Sensing		for Gear
	Off	Off	On	On			for		45 Seconds
3A. Ice Run					Water Level	Ice Contact		Motor
							Temperature
Out								Speed
								Not
3B. Drain					Not	Sensing	Not Sensing	Sensing
	Off	On	Off	Off	Sensing for		for	for Gear	45 Seconds
Evaporator						Ice Contact
					Water Level		Temperature	Motor
								Speed
								Not	Until Ice No
					Not		Not Sensing	Sensing
AUTOMATIC	Off	Off	Off	Off		Sensing			Longer
					Sensing for		for	for Gear
SHUT-OFF						Ice Contact			Contacts Bin
					Water Level		Temperature	Motor
								Speed	Level Probe

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.

QC700/QF800

Condenser Fan Motor -The fan motor is wired through a fan cycle pressure control. The fan motor will cycle on/off depending on discharge pressure 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.

Part No. 80-1214-3 Revised 8/2003 6-1