Parts Connect IM70 User manual

Household Ice Machine
Service Manual
This manual is to be used by qualified technicians
only. Parts Connect does not assume any
responsibility for property damage or personal
injury for improper service procedures by an
unqualified person.
Model # IM70
Made in China
Indianapolis, Indiana, USA
www.parts-connect.com

2
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3
Control Board
This section identifies the main control board connections.
code
function
socket color
plug
color
wire color
wire label
remark
SWS
water level switch
white
white
white x2
SWS
ZFS
evaporator temperature
sensor
red
red
white+black
ZFS
LNS
condenser temperature
sensor
purple
purple
white+red
LNS
HP
refrigerant pressure sensor
black
not in use
SEN1
ice cube flap switch
red
red
white x2
SEN1
CZ1
front control panel
white
white
white x6
CZ1
CZ3
secondary coil transformer
white
white
blue x2
CZ3
CZ5
primary coil transformer
white
white
red x2
CZ5
N1
neutral of reversing valve
1/4” male
white
blue
N1
N2
neutral of pump & discharge
valve
1/4” male
white
white x2
N2
N3
neutral of compressor
1/4” male
white
white
N3
COM
line (general power)
1/4” male on relay
brown
black
COM
NO
line of compressor
1/4” male on relay
brown
orange
NO
PSF1
line of discharge valve
1/4” male
white
blue
PSF1
FJ1
line of fan motor
1/4” male
white
brown
FJ1
SF1
line of inlet valve
1/4” male
white
grey
SF1
SB1
line of pump
1/4” male
white
red
SB1
RF1
line of reversing valve
1/4” male
white
blue
RF1
FUSE1
fuse for transformer
1A 250V
marked on board
FUSE2
fuse (general exclude
compressor)
6.3A 250V
marked on board
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.

4
Button Operation
The status and time lapse are dependent when pressing buttons.
status
main power off
ice machine power is unplugged or main power switch is turned off
SMG off
ice machine is plugged in and main power switch is on but SMG shows OFF
setting
ice machine is in setting mode. While SMG shows OFF long press "mode" button
enters setting mode.
ice making cycle
include following status: ice making, harvest, pre-chill
press
short
press the button more than 1 second, less than 3 seconds and then release
medium
press the button more than 3 seconds, less than 10 seconds and then release
long
press the button more than 10 seconds and then release
status
operation
lights and SMG
shown
details
1
main power
off
turn on the main power
switch at front lower right
side of ice machine
power light：on
SMG：OFF
main switch controls the general
power of the ice machine. Suggest
to turn it off if ice machine is not for
use for a long time.
2
SMG: OFF
long press "set" button
SMG: shows number
between 001 to 180
filter light: flash
the number shows the days the
filter has been in use. When the
number is larger than 180 days the
filter light will stay on. Advice to the
homeowner is to change the filter.
After home owner changes the
filter a medium press of the reset
button resets the days to zero.
short press "reset" button,
before release, short press
"on/off" button
SMG: shows 888 for 1
second then shows
PPP for 3 seconds
all other lights: on for 1
second and then off
this operation is to reset all
settings to "default factory"
settings.
short press "on/off" button
SMG: shows 888 for 1
second then shows
COO
all other lights: on for 1
second and then off
this operation turns on the ice
machine and starts the ice making
process.
3
setting
long press "reset" button
SMG: shows XXX for
10 seconds and then
shows UUU for 3
seconds
all other lights: on for 1
second and then off
XXX means the last number shows
in SMG during setting, after
setting, do this operation, can
upload the last setting to ice
machine as default. (don't show
house owner this operation, this
will cause problems if they change
the default. This is only for
serviceman if the ice machine use
for extremely hot or cold place,
change default can help house
owner minimum the problems.)
4
ice making
medium press "clean" button
SMG: shows current
number for 3 seconds
the fixed number in SMG is the
harvest time during last ice making

5
status
operation
lights and SMG
shown
details
and then changes to a
fixed number.
ice making light: on
cycle. This operation is to help
serviceman to find problems of last
harvest.
5
harvest
medium press "clean" button
SMG: shows current
number for 3 seconds
and then changes to a
fixed number.
ice making light: on
the fixed number in SMG is the ice
making time during last ice making
cycle. This operation is to help
serviceman find problems of last
ice making.
6
all except
SMG
showing OFF
short press "clean" button
SMG: CLE
ice making and
harvest lights: flash
operation will force ice machine to
enter into a clean cycle. This cycle
is 30 minutes.
Short press clean or mode button
will terminate the clean process
and enter into new ice making
cycle.

6
Parameter Setting
status
operation
lights and SMG shown
details
1
ice making
cycle
short press mode button
SMG: show current
number for 2 seconds
and then show 1xx
ice making light: on
Parameter 1 is used to modify the
thickness of ice cubes. xx will flash
during setting. Short press set button
can change the 1xx, from 100 to 119,
100 is thinnest. after setting, leave it
no-operation for 10 seconds and
system will automatically remember
the setting and go back to ice making
cycle. Default number is 111.
2
SMG: OFF
long press mode button
SMG: show OFF for 10
seconds and then show
2xx
Parameter 2 used to set the ice
making time. Short press the set
button will change the 2xx from 200 to
209, see ice making time table.
long press mode button,
release and then short
press mode button 1 time
SMG: show OFF for 10
seconds and then show
2xx->3xx
Parameter 3 used to set the harvest
time. Short press the set button will
change the 3xx from 300 to 309, see
harvest time table.
long press mode button,
release and then short
press mode button 2 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx
Parameter 4 used to set the pre-chill
time. Short press the set button will
change the 4xx from 400 to 490, see
pre-chill time table.
long press mode button,
release and then short
press mode button 3 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx
Parameter 5 used to set the gap
between 2 self-clean procedures.
Short press set button can change the
5xx from 500 to 590, see self-clean
frequency table.
long press mode button,
release and then short
press mode button 4 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx->6xx
Parameter 6 used to set the maximum
lack-of-water alarm time. Short press
set button can change the 6xx from
600 to 609, see maximum lack-of-
water table.
long press mode button,
release and then short
press mode button 5 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
>6xx->7xx
Parameter 7 is used to set the
maximum water inlet time. Short press
set button can change the 7xx from
700 to 709, see maximum water inlet
table.
long press mode button,
release and then short
press mode button 6 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
>6xx->7xx->8xx
Parameter 8 is used to set the ice
making lapse time. Short press set
button can change the 8xx from 800 to
809, see ice making lapse table.
long press mode button,
release and then short
press mode button 7 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
>6xx->7xx->8xx->9xx
Parameter 9 is used to set the
maximum condenser temperature.
Short press set button can change the
9xx from 900 to 909, see maximum
condenser temperature table.
long press mode button,
release and then short
press mode button 8 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
Parameter P is used to set the water
discharge frequency. Short press set
button can change the Pxx from P00 to

7
status
operation
lights and SMG shown
details
>6xx->7xx->8xx->9xx-
>Pxx
P09, see water discharge frequency
table.
long press mode button,
release and then short
press mode button 9 time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
>6xx->7xx->8xx->9xx-
>Pxx->Axx
Parameter A is used to set the water
discharge time. Short press set button
can change the Axx from A00 to A09,
see water discharge time table.
long press mode button,
release and then short
press mode button 10
time
SMG: show OFF for 10
seconds and then show
2xx->3xx->4xx->5xx-
>6xx->7xx->8xx->9xx-
>Pxx->Axx-CLx
Parameter CL is used to turn on/off the
startup clean feature. CL0 is no startup
clean, CL1 means have startup clean.
Short press set button changes
between CL0 and CL1.
Parameter Info Tables
Ice Cube Thickness
parameter
refer to
unit
100
0
Celsius
101
-1
Celsius
102
-2
Celsius
103
-3
Celsius
104
-4
Celsius
105
-5
Celsius
106
-6
Celsius
107
-7
Celsius
108
-8
Celsius
109
-9
Celsius
110
-10
Celsius
111
-11
Celsius
112
-12
Celsius
113
-13
Celsius
114
-14
Celsius
115
-15
Celsius
116
-16
Celsius
117
-17
Celsius
118
-18
Celsius
119
-19
Celsius
FACTORY DEFAULT SETTING

8
Ice cube thickness is controlled by the evaporator temperature. The parameter actually refers
to the evaporator temperature. The colder you set, the thicker you get.
Maximum Ice Making Time
parameter
refer to
200
1 min
201
5 min
202
10 min
203
15 min
204
20 min
205
25 min
206
30 min
207
35 min
208
40 min
209
45 min
If the ice making procedure is longer than the maximum ice making time the system will give
an error code. The reason normally is because the evaporator not cold enough.
Maximum Harvest Time
parameter
refer to
300
0 min
301
1 min
302
2 min
303
3 min
304
4 min
305
5 min
306
6 min
307
7 min
308
8 min
309
9 min
If harvest procedure is longer than maximum harvest time the system will give an error code.
The reason mainly is the ice cubes can't release from the evaporator or flapper/sensor is
defective.
Pre-chill Time
parameter
refer to
400
0 sec
410
10 sec
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING

parameter refer to
420 20 sec
430 30 sec
440 40 sec
450 50 sec
460 60 sec
470 70 sec
480 80 sec
490 90 sec
4E0 120 sec
Pre-chill procedure is to pre-cool the evaporator and speed up the ice cube making cycle.
Self-Clean Frequency
parameter refer to
500 no self clean
510
520
Every 10 ice making cycles
every 20 ice making cycles
530every 30 ice making cycles
540every 40 ice making cycles
550every 50 ice making cycles
560every 60 ice making cycles
570every 70 ice making cycles
580every 80 ice making cycles
590every 90 ice making cycles
Self-clean is a procedure that runs the automatic clean on a certain frequency.
parameter
Maximum Lack-of-Water Time
refer to
600 0 min
601 1 min
602 3 min
603 5 min
604 7 min
605 9 min
606 11 min
607 13 min
608 15 min
20
9
min
609
Pre-chill Time (continued)
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING

parameter
The maximum lack-of-water time is used to prevent the pump system from running dry and
damaging the pump.
Maximum Water Filling Time
refer to
700 1 min
701 5 min
702 10 min
703 15 min
704 20 min
705 25 min
706 30 min
707 35 min
708 40 min
709 45 min
parameter refer to
800 0 min
801 1 min
802 2 min
803 3 min
The maximum water filling time is used to prevent the inlet water valve from burning out if
water filling time is too long. Which is normally caused by water supply pressure too low.
Ice Making Time Lapse
804 4 min
805 5 min
806 6 min
807 7 min
808 8 min
809 9 min
The ice making time lapse is the additional time to make the ice cube after evaporator has
reached correct temperature. The longer the time you set, the thicker the ice cube you get.
10
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING

11
Condenser Temperature Range
parameter
refer to
900
11-13 Celsius
901
13-15 Celsius
902
15-17 Celsius
903
17-19 Celsius
904
19-21 Celsius
905
21-23 Celsius
906
23-25 Celsius
907
25-27 Celsius
908
27-29 Celsius
909
29-31 Celsius
The condenser temperature is the on-off control for the condenser fan. It is suggested to not
change the default unless the circumstance temperature is extremely low or high.
Water Discharge Frequency
parameter
refer to
P00
no discharge
P01
every 1 ice making cycle
P02
every 2 ice making cycles
P03
every 3 ice making cycles
P04
every 4 ice making cycles
P05
every 5 ice making cycles
P06
every 6 ice making cycles
P07
every 7 ice making cycles
P08
every 8 ice making cycles
P09
every 9 ice making cycles
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING

12
A04
20 sec
A05
25 sec
A06
30 sec
A07
35 sec
A08
40 sec
A09
45 sec
The water discharge time is used in combination with the water discharge frequency.
Startup Clean
parameter
refer to
CL0
no startup clean
CL1
have startup clean
Startup clean is only available during system power on and started.
The water discharge process is used for situations where the water tank is too cold. Possibly
some of the water inside the tank has become ice. The ice can jam the pump system.
Water Discharge Time
parameter
refer to
A00
0 sec
A01
5 sec
A02
10 sec
15 sec
A03
FACTORY DEFAULT SETTING
FACTORY DEFAULT SETTING