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This section identifies the main control board connections.
code
function
SWS
water level switch
ZFS
evaporator temperature
sensor
LNS
condenser temperature
sensor
HP
refrigerant pressure sensor
SEN1
ice cube flap switch
CZ1
front control panel
CZ3
secondary coil transformer
CZ5
primary coil transformer
N1
neutral of reversing valve
N2
neutral of pump & discharge
valve
N3
neutral of compressor
COM
line (general power)
NO
line of compressor
PSF1
line of discharge valve
FJ1
line of fan motor
SF1
line of inlet valve
SB1
line of pump
RF1
line of reversing valve
FUSE1 fuse for transformer
FUSE2 fuse (general exclude
compressor)
The main control board is located on the back of the ice machine, within the metal box.
This list is made available for reference to help a serviceman in the replacement of a main
control board.
Control Board
socket color
plug
color
white
white
red
red
purple
purple white+red
black
red
red
white
white
white
white
white
white
1/4" male
white
1/4" male
white
1/4" male
white
1/4" male on relay brown black
1/4" male on relay brown orange
1/4" male
white
1/4" male
white
1/4" male
white
1/4" male
white
1/4" male
white
3
wire color
wire label remark
white x2
SWS
white+black ZFS
LNS
white x2
SEN1
white x6
CZ1
blue x2
CZ3
red x2
CZ5
blue
N1
white x2
N2
white
N3
COM
NO
blue
PSF1
brown
FJ1
grey
SF1
red
SB1
blue
RF1
1A 250V
6.3A 250V marked on board
not in use
marked on board
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