Manitowoc Marine Q 1800 Service Manual page 12

Electrical System
7. Automatic Shut-Off
If 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 7 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).
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
Self-Contained Models
Toggle Switch
Bin Switch
Control Board Relays
#1 Water Pump
#2 Water Fill Valve
#3 Hot Gas Solenoid
#4 Water Dump Valve
#5 Contactor Coil
Compressor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
8
L1
TB35
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB35
7. Automatic Shut-Off (Until Bin Switch Closes)
(55)
TB32
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
NOT USED
PLUG
(62)
(63)
(64)
BIN SWITCH
(65)
(67)
(66)
(66)
COMPRESSOR
R
S
CONTACTOR
*OVERLOAD
C
CONTACTS
(48)
L1
(51)
(52) (85) (86)
TB33
FAN CYCLE CONTROL
RUN CAPACITOR**
ICE
Open
Open / OFF
Open / OFF
Open / OFF
Open / OFF
Open / OFF
OFF
Closed
Closed
SEE SERIAL PLATE FOR VOLTAGE
(21)
(61)
WATER
VALVE
(60)
(77)
HOT GAS
SOLENOID
(76)
DUMP
SOLENOID
(57)
(98)
TB31
(58)
TB37
(59)
TERMINATES AT
PIN CONNECTION
(73)
CONTACTOR
(56) COIL
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
VIEW FOR WIRING
(68)
ICE
(69) INTERNAL WORKING
OFF 66
VIEW
62
CLEAN
(62)
(49)
RUN CAPACITOR
(47)
R
R
(46) (50)
(45)
PTCR
(53)
TB34
FAN MOTOR
(AIR COOLED ONLY)
L2 (N)
(22)
(80)
(75)
TB30
(81)
(99)
TB30
WATER
PUMP
(74)
TB30
TB30
68
67
69
TB30
TB30
SV1646-7