Manitowoc Ice FLAKE/CHIPLET QF0400 - Manual (Page 63)

Part No. 80-1214-3 6-1
Section 6
Electrical System
Energized Parts Charts
QF400/QC700/QF800
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.
Ice Making
Sequence Of
Operation
Control Relays Sensors
Length
Of Time
1 2 3 4
Water
Level
Probe
Bin Level
Probe
Temperature
Sensor
Gear
Motor
Speed
Contactor
Coil
Dump
Valve
Gear
Motor
Float
Valve
Coil
START-UP
1A. Water
Flush
Off On On Off
Not
Sensing for
Water Level
Sensing No
Ice Contact
Not Sensing
for
Temperature
Sensing
for Gear
Motor
Speed
45 Seconds
1B. Water Fill Off Off On On
Sensing for
Water Level
Sensing No
Ice Contact
Not Sensing
for
Temperature
Sensing
for Gear
Motor
Speed
Until Water
Contacts
Water Level
Probe
FREEZE
SEQUENCE
2. Freeze
On Off On On
Sensing for
Water Level
Sensing No
Ice Contact
Sensing for
245 ° F
Immediately.
Sensing for
155 ° F after 30
min. of Ice
Making
Sensing
for Gear
Motor
Speed
Until Ice
Contacts Bin
Level Probe for
30 Continuous
Seconds
AUTOMATIC
SHUT-OFF
3A. Ice Run
Out
Off Off On On
Sensing for
Water Level
Sensing
Ice Contact
Not Sensing
for
Temperature
Sensing
for Gear
Motor
Speed
45 Seconds
3B. Drain
Evaporator
Off On Off Off
Not
Sensing for
Water Level
Sensing
Ice Contact
Not Sensing
for
Temperature
Not
Sensing
for Gear
Motor
Speed
45 Seconds
AUTOMATIC
SHUT-OFF
Off Off Off Off
Not
Sensing for
Water Level
Sensing
Ice Contact
Not Sensing
for
Temperature
Not
Sensing
for Gear
Motor
Speed
Until Ice No
Longer
Contacts Bin
Level Probe
Revised 8/2003