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Electrical System
Freeze Sequence
3. PRE-CHILL
To pre-chill the evaporator, the
compressor runs for 30 seconds prior to
water flow.
Remote Models
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Hot Gas Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#3
Water Dump Valve
#4
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Transformer Fuse (On Control Board)
Thermistor Operation
6-12
L1
TB32
(55)
TB35
HIGH
PRESSURE
CUT-OUT
ICE THICKNESS PROBE
DISCHARGE LINE THERMISTOR
BIN SWITCH
(64)
(66)
CONTACTOR
CONTACTS
*OVERLOAD
(42)
(48)
TB35
(51)
L1
(52)
TB33
(F1)
(Old Style Control Board Shown)
3. Pre-Chill (30 Seconds)
(61)
(60)
3
1
2
4
(57)
TB31
TRANS.
FUSE
(58)
FUSE (7A)
TB37
1D
1C
1B
HARVEST LIGHT/
1A
LOW D.C.
SAFETY LIMIT CODE LIGHT
VOLTAGE
PLUG
(62)
BIN SWITCH LIGHT
(63)
TOGGLE SWITCH
(65)
(68)
(67)
ICE
← ← ← ← INTERNAL
(69)
(66)
OFF
WORKING VIEW
CLEAN
(62)
(49)
COMPRESSOR
RUN CAPACITOR
(47)
R
R
S
(46)
C
PTCR
(53)
TERMINATES AT
TB34
PIN CONNECTION
REMOTE FAN
MOTOR
RUN CAPACITOR
ICE
Closed
Open
OFF
Open
OFF
OFF
Open
OFF
Closed
ON
Energized
ON
ON
Closed
Closed
Closed
OK
Section 6
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
HPR
SOLENOID
(78)
(79)
(71)
(80)
HOT GAS
SOLENOID
(76)
(75)
TB30
(81)
DUMP
SOLENOID
(98)
(99)
TB30
WATER
PUMP
(59)
(83)
(82)
LIQUID LINE
SOLENOID
(73)
TB30
(74)
CONTACTOR
(56)
COIL
TB30
VIEW FOR WIRING
68
66
67
62
69
R
(50)
TB30
(45)
(F2)
TB30
REMOTE
CONDENSER
SV1554
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