S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice

Electrical System Section 6
Automatic Shut-Off
7. AUTOMATIC SHUT-OFF
When the storage bin is full at the
end of a harvest cycle, the sheet of
cubes fails to clear the water curtain
and holds it open. After the water
curtain is held open for 30 seconds,
the ice machine shuts off.
The ice machine remains off until
enough ice is removed from the
storage bin to allow the sheet of
cubes to drop clear of the water
curtain. As the water curtain swings
back to the operating position, the bin
switch closes and the ice machine
restarts (steps 1-2), provided the 3
minute delay period is complete.
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
L1
(88)
Ground
(89)
High
Pressure
Cutout
(42)
Self-Contained — Automatic Shut-Off
Table 6-7. Self-Contained Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle Switch ICE
Bin Switch
Control Board Relays
Open
#1 Water Pump OFF
#2 Harvest Valve (Left) OFF
#3 Harvest Valve (Right) OFF (When Used)
#4 Air Compressor OFF (When Used)
#5 Water Inlet Valve OFF
#6 Water Dump Valve OFF
#7 Contactor Coil Open / OFF
#7A Compressor OFF
#7B Condenser Fan Motor OFF
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out Closed
Main Fuse (On Control Board) Closed
(55)
Ice Thickness
Probe
Water Level Probe
Contactor
Contacts
(Black)
L1
Overload
(51) (85)
Control Board
(2)
(6)
(5)
(1)
(7)
(4)
Trans.
Fuse (7a)
Water Valve
(21)
(22)
Harvest Valve
(77)
(80)
SV3137-1
6-8 Part Number 80-1634-3
Low DC
Voltage
Plug
(Red)
Fan Cycle
Control
(9)
L2
(25)
(8)
Compressor
(86)
(Yellow)
(61)
(26)
(1)
(2)
(20)
(60)
(57)
(6)
(46)
(58)
Dump Valve
(76)
(81)
Water Pump
(98)
(59)
Terminates at
Pin Connection
Contactor Coil
(56)
Air Compressor
Bin Switch
PTCR
Fan Motor
Clean
OFF
ICE
Run Capacitor
(74)
Run Capacitor
(50)
(45)
(99)
(75)
L2 or N