Service manual
Part No. 80-1206-3 6-1
Section 6
Electrical System
Energized Parts Charts
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C
*Low Pressure Control (close on pressure increase).
1. Initial Start-Up or Start-Up After Automatic Shut-Off
2. Contactor Coil energizes in Water Purge when suction pressure exceeds 22 psig.
3. The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off. Q0600C & IB0600C ice machines do not use a fan
cycle control, therefore the condenser fan motor will be energized anytime the contactor is closed.
SU1000C - A float valve replaces the water inlet valve. The float adds water anytime the water level drops below the float valve set point.
Safety Timers
The control board has the following non-adjustable safety timers:
Freeze Sequence:
• The ice machine is locked in the Freeze Sequence for the first 6 minutes, not allowing the Ice Thickness Probe to
initiate a Harvest Sequence.
• The maximum freeze time is 60 minutes, at which time the Control Board automatically initiates a Harvest
Sequence.
Harvest Sequence:
• The maximum harvest time is 3.5 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. If the bin switch is closed, the
ice machine will go to the Freeze Sequence.
Ice Making
Sequence Of
Operation
Control Board Relays Condensing Unit
Length
Of Time
1 2 3 4 5 LPC* Contactor
Water
Pump
Water Fill
Valve
Cool
Vapor
Valve
Water
Dump
Valve
Liquid
Line
Solenoid
Valve
Contactor
Coil
Compressor/
Condenser
Fan Motor
START-UP
1
1. Water Purge
On Off On On Off
Open/
Closed
2
On
3
45 Seconds
2. Refrigeration
System
Start-Up
Off On On Off On Closed On
3
5 Seconds
FREEZE
SEQUENCE
3. Pre-Chill
Off
May cycle On/
Off during first
45 sec.
-----------
Cycles On,
then Off 1
more time
Off Off On Closed On
3
30 Seconds
4. Freeze On Off Off On Closed On
3
Until 7 sec.
water contact
with ice
thickness probe
HARVEST
SEQUENCE
5. Water Purge
On
30 sec. Off,
15 sec. On
On On On Closed On
3
Factory-set at
45 Seconds
6. Harvest Off Off On Off On Closed On
3
Bin switch
activation
7. AUTOMATIC
SHUT-OFF
Off Off Off Off Off Open Off
Until bin switch
re-closes