Manitowoc S600M, Service Manual

Page: 45 / 103

Section 6 Electrical System
Part Number 80-1630-3
6-5
4. FREEZE
The water pump starts after the pre-
chill. An even flow of water is directed
across the evaporator and into each
cube cell, where it freezes.
The water fill valve will cycle off then
on one more time to refill the water
trough.
When sufficient ice has formed, the
water flow (not the ice) contacts the
ice thickness probes. After
approximately 10 seconds of
continual contact, a harvest cycle is
initiated.
NOTE: The ice machine cannot
initiate a harvest cycle until a 6-
minute freeze lock has expired.
Self-Contained — Freeze
Table 6-4. Self-Contained Models
4. Freeze (Until 10 Seconds of Water Contact with Ice Thickness Probe)
Toggle Switch ICE
Bin Switch Closed
Control Board Relays
#1 Water Pump ON
#2 Harvest Valve (Left) OFF
#3 Harvest Valve (Right) OFF (When Used)
#4 Air Compressor Not Used
#5 Water Inlet Valve
Cycles OFF, then ON
one more time
#6 Water Dump Valve OFF
#7 Contactor Coil Closed / ON
#7A Compressor ON
#7B Condenser Fan Motor May Cycle ON / OFF
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out Closed
Main Fuse (On Control Board) Closed
SV3137-5
(89)
(55)
(88)
High
Pressure
Cutout
Control Board
L1
Ground
(2)
(6)
(5)
(1)
(7)
(4)
L2 or N
Water Valve
Harvest Valve
(20)
(21)
(22)
(61)
Dump Valve
Water Pump
(60)
(76)
(81)
(75)
(77)
(80)
(57)
(98)
(58)
(59)
(42)
Ice Thickness
Probe
Water Level Probe
Trans.
Fuse (7a)
L2
Terminates at
Pin Connection
(99)
Contactor Coil
(56)
Air Compressor
(26)
(25)
Low DC
Voltage
Plug
Bin Switch
Clean
OFF
ICE
(2)
(1)
(6)
(8)
(9)
(74)
Compressor
Run Capacitor
(Red)
(Yellow)
Fan Motor
PTCR
(45)
(46)
(50)
(51)
(85)
Overload
(Black)
(86)
Fan Cycle
Control
L1
Contactor
Contacts
Run Capacitor