Manitowoc S0850M, Service Manual

Page: 46 / 100

Electrical System Section 6
6-8
Part Number 80-1558-3
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.
Self-Contained — Automatic Shut-Off
Table 6-7. Self-Contained Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle Switch ICE
Bin Switch Open
Control Board Relays
#1 Water Pump OFF
#2 Harvest Valve (Left) OFF
#3 Harvest Valve (Right) OFF (When Used)
#4 Not 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
SV3137-1
(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