Service manual

May 2008
Page 46
CU1526, CU2026, CU3030
Service Manual
Wiring Diagram, CU3030 60 Hz
ON/OFF SWITCH
ON/OFF SWITCH
O
W
BK
*
*
GN
W
BN/W
W
Y
W
FAN CYCLING PRESSURE SWITCH (A/C ONLY)
HARVEST ASSIST SOLENOID 1
ICE THICKNESS PROBE
CURTAIN SWITCH 2 (2 PLATE UNITS ONLY)
CURTAIN SWITCH 1
CURTAIN SWITCH
J6
1234
CAUTION: PTCR WILL BE HOT. COMPRESSOR MAY NOT START IF PTCR IS NOT ALLOWED TO COOL
MOT FAN
(WHEN 2ND FAN IS PRESENT)
W/Y
(AC ONLY)
(AIR COOLED ONLY)
FAN MOTOR
Y
HIGH PRESSURE CONTROL SEE NOTE 4
L1 T1
L2
T2
CONTACTOR
LINE
LOAD
TRANSFORMER
MOT PUMP
SOLENOID
SOLENOID
HOT GAS
WATER
TERMINAL BOX
C1
S2
R3
COMPRESSOR
W
BK
R
USE COPPER CONDUCTORS ONLY
THIS UNIT MUST BE GROUNDED.
CAUTION:
MORE THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT.
17-3123-01
RUN CAP
PTCR
POWER SUPPLY
SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE
L1
N (115/60/1 UNITS) L2 (230/60/1 UNITS)
LINE
12V
TRANSFORMER
HOT GAS VALVE
WATER VALVE
CONTACTOR COIL
COMPRESSOR
RUN CAP.
WATER PUMP
PTCR
CONTACTOR T1
WATER LEVEL SENSOR
SUMP TEMP.
DISCHARGE TEMP.
ELECTRONIC CONTROL
BN
W
BU
W
BK
W
O
R/W
V
BN/W
ELECTRONIC CONTROL
BK
Y
R
W/R
W/R
W
DUMP VALVE
BK
DUMP VALVE
HIGH PRESSURE CONTROL
MOT FAN
W
BN
FAN MOTOR
(WHEN APPLICABLE) (AC ONLY)
4321
J1
3
2
1
J9
7654321
J2
2
1
J8
2
1
J7
R
8
FAN CYCLING PRESSURE CONTROL SWITCH
(AIR COOLED ONLY)
BN
DISCHARGE TEMP. SENSOR
SUMP TEMP. SENSOR
WATER LEVEL SENSOR
W
BK
R
EARTH GROUND
J10
HARV ASSIST
SOLENOID
ICE THICKNESS PROBE
BK
W
GN/Y
GN/Y
SEE NOTE 4
PROTECTOR INTERNAL