Bin Switch; Remote Models - Manitowoc S Service Manual

Electrical System

REMOTE MODELS

1
Ice Making
Sequence Of
Water
Operation
Pump
1
START-UP
On
1. Water Purge
2. Refrigeration
System Off
Start-Up
FREEZE
SEQUENCE Off
3. Pre-Chill
4. Freeze On
HARVEST
SEQUENCE On
5. Water Purge
6. Harvest Off
7. AUTOMATIC
Off
SHUT-OFF
1. Initial Start-Up or Start-Up After Automatic Shut-Off
*Not used on all models
Auto Shut-Off
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 1-
2) immediately after the delay period, if the bin switch re-
closes prior to 3 minutes.
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 0 or 45 second purge
cycle.
6-2
Control Board Relays
2 3 4
Harvest
Valve Harvest
Air
(Left) Valve
Comp.*
HPR (Right)*
Valve
35 sec.
Off
On On
10 sec.
On
On On Off
Off Off Off
Off Off Off
On; after
On On
35 sec.
On On On
Off Off Off
5 6 7
Contactor
Water
Coil
Dump
Inlet
Valve
Liquid Line
Valve
Solenoid
Off On Off
On Off On
May
Cycle
On/Off Off On
during
first
45 sec.
Cycles
Off then
Off On
On one
more
time
30 sec.
Off,
On On
15 sec.
On
Off Off On
Off Off Off
Safety Timers
The control board has the following non-adjustable
safety timers:
• The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence. The freeze lock
is bypassed when the toggle switch is moved from
the OFF to ICE position on the first cycle only.
• The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
• The maximum harvest time is 3-1/2 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 (step 7). If the
bin switch is closed, the ice machine will go to the
freeze sequence (steps 3-4).
Section 6
Contactor
7A 7B
Length
Cond.
Of Time
Comp. Fan
Motor
Off Off 45 Seconds
On On 5 Seconds
Initial Start-
Up is 60
On On Seconds
30 Seconds
thereafter
Until 10 sec.
water
contact with
On On
ice
thickness
probe
Factory-set
On On at 45
Seconds

Bin switch

On On
activation
Until bin
Off Off switch re-
closes
Part Number 80-1480-3