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Section 6
Harvest Sequence (cont.)
6. HARVEST
The hot gas valve(s) and HPR solenoid
valve remain open, allowing refrigerant
gas to warm 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).
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
L1
TB32
TB35
HIGH
PRESSURE
CUT-OUT
ICE THICKNESS PROBE
DISCHARGE LINE THERMISTOR
CONTACTOR
CONTACTS
(42)
TB35
(51)
L1
TB33
(Old Style Control Board Shown)
6. Harvest (Until Bin Switch Activation)
Electrical System
(55)
3
1
2
4
TRANS.
FUSE
FUSE (7A)
1D
1C
1B
HARVEST LIGHT/
1A
LOW D.C.
SAFETY LIMIT CODE LIGHT
VOLTAGE
PLUG
(62)
BIN SWITCH LIGHT
(63)
BIN SWITCH
(64)
(65)
(68)
(67)
ICE
(69)
(66)
(66)
OFF
CLEAN
(62)
(49)
COMPRESSOR
(47)
R
S
C
*OVERLOAD
(48)
(52)
(53)
TERMINATES AT
TB34
PIN CONNECTION
(F1)
RUN CAPACITOR
ICE
Closed
Open
OFF
Closed
ON
ON
Open
OFF
Closed
ON
Energized
ON
ON
Closed
Closed
Closed
OK
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
HPR
SOLENOID
(78)
(79)
(61)
(60)
(71)
(80)
HOT GAS
SOLENOID
(76)
(75)
TB30
(81)
DUMP
(57)
SOLENOID
TB31
(98)
(99)
TB30
WATER
(58)
PUMP
TB37
(59)
(83)
(82)
LIQUID LINE
SOLENOID
(73)
TB30
(74)
CONTACTOR
(56)
COIL
TB30
TOGGLE SWITCH
VIEW FOR WIRING
68
← ← ← ← INTERNAL
66
67
WORKING VIEW
62
69
RUN CAPACITOR
R
R
(46)
(50)
TB30
(45)
PTCR
(F2)
TB30
REMOTE FAN
MOTOR
REMOTE
CONDENSER
SV1557
6-15
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