Manitowoc S600M, Service Manual

Page: 47 / 103

Section 6 Electrical System
Part Number 80-1630-3
6-7
6. HARVEST
The harvest valve(s) remains open
and the refrigerant gas warms the
evaporator. This causes the cubes to
slide, as a sheet, off the evaporator
and into the storage bin.
The sliding sheet of cubes swings the
water curtain out, opening the bin
switch. This momentary opening and
closing of the bin switch terminates
the Harvest Cycle and returns the ice
machine to the Freeze Cycle (steps
3-4).
The air compressor (when used)
remains energized throughout the
entire harvest cycle. The air
compressor will automatically
energize after 60 seconds when the
harvest cycle time exceeded 75
seconds in the previous cycle.
Table 6-6. Self-Contained Models
6. Harvest (Until Bin Switch Activation)
Toggle Switch ICE
Bin Switch Closed
Control Board Relays
#1 Water Pump OFF
#2 Harvest Valve (Left) ON
#3 Harvest Valve (Right) ON (When Used)
#4 Air Compressor Not Used
#5 Water Inlet Valve OFF
#6 Water Dump Valve OFF
#7 Contactor Coil Closed / ON
#7A Compressor ON
#7B Condenser Fan Motor OFF; May Cycle ON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out Closed
Main Fuse (On Control Board) Closed
SV3137-7
(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