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Page 10

Icemaker Information

6-10

#7005333 - Revision C - September, 2010

Built-In (BI) Series

Built-In (BI) Series

ICEMAKER FAULT TESTING

Bypass 45-minute dwell by pressing ICE MAKER key to OFF,
then again to ON.  Now, depress the freezer light switch and
manually start icemaker by turning driver gear counter-clock-
wise with screwdriver.

1

If icemaker starts & finishes cycle: 

(

NOTE:

 

If >15°F, icemaker will only complete 1 revolu-

tion.)

a. Visually inspect electrical connections at icemaker &

valve. Repair if necessary.

b. Check valve operation with test cord, if doesn't open,

replace valve.

c. Check thermostat. (Open: 48°F ±6°, Close: 15°F ±3°).

Replace icemaker if defective.

d. With icemaker in park position, check solenoid switch

terminals "C" & "NO" for continuity.  With ejector
between 8:00 & 10:00 position, check solenoid switch
terminals "C" & "NC" for continuity.  If no continuity for
either terminal check, replace icemaker.

2. If icemaker starts but does not finish cycle:

a. With icemaker in park position check holding switch ter-

minals "C" & "NC" for continuity.  Then with icemaker
ejector between 10:00 & 12:00, check holding switch
terminals "C" & "NO" for continuity.  If no continuity for
either terminal check, replace icemaker.  (Refer to
enclosed wiring diagram)

b. With icemaker in park position check shut-off switch

terminals "C" & "NO" for continuity.  With ejector
between 12:00 & 2:00 check shut-off switch terminals
"C" & "NC" for continuity. If no continuity for either ter-
minal check, replace icemaker. 

c. Check mold heater for 75-85

Ω

.  If outside range,

heater is bad, replace icemaker. If heater checks OK,
thermostat is bad, replace icemaker.

3

If icemaker motor does NOT start:

a. Lower shutoff arm
b. Check motor operation with test cord. If motor doesn't

run, replace icemaker.

c. Check power to and from icemaker rocker switch (if

present). Reconnect or repair connection or replace
switch as necessary.

d. Check for power from control board to icemaker. If

power is present check & repair connection.  If no
power, replace control board.

QUICK REFERENCE

• Water Fill Time:  May vary by water pressure 
• Fill Tube Heater Ohm:  2850-3890

Ω

• Mold Heater Ohm:  75-85

Ω

• Water Valve Ohm:  160-165

Ω

• Thermostat Open/Close - Open: 48°F ±6° Close: 15°F ±°3
• Water Pressure Needed:  30 -120 psi constant

NOTE:

 

This is a filtered water specification as non-filtered

systems ae are rated at 20-100 psi.

ICEMAKER TROUBLESHOOTING

No / Slow Ice Production

1

Ice maker system switched OFF.  Switch system ON.

2  Shut off arm in up/OFF position.  Move to ON position.
3

Freezer too warm.  Check temp’s & see troubleshooting
guide in service manual.

4

Poor airflow over icemaker.  Remove obstructions.

5

Ice cube jam.  Remove ice.

6

Water froze in inlet tube.  Remove ice from tube.  Check
for power from control board to fill tube heater; Fill tube
heater = 2850-3890

Ω

.

7

Water supply not constant 20-120 psi.  Instruct customer.

8

Water line to unit pinched/kinked/clogged.  Repair line.

9

Saddle valve not installed correctly.  Reposition.

10 Saddle valve not fully open.  Open valve fully.
11 Icemaker wire/connections loose/broken.  Repair wiring.
12 Water valve wire/connections loose/broken.  Repair wiring.
13 Defective water valve. Valve =160-165

Ω.

Replace valve.

14 Thermostat wire/connections loose/broken.  Repair wiring.
15 TCO overheat or short.  Fix cause or replace icemaker. 
16 See Icemaker Fault Testing.

No Water Fill

1

Water supply switched OFF.  Switch supply water line ON.

2

Water line to unit pinched/kinked/clogged.  Repair line.

3

Saddle valve not installed correctly to supply line.
Reposition.

4

Water froze in inlet tube.  Remove ice from tube.  Check
for power from control board to fill tube heater; Fill tube
heater = 2850-3890

Ω

.

5

Water valve wire/connections loose/broken.  Repair wiring.

6

Defective water valve. Valve =160-165

Ω.

Replace valve.

Overflows / Ice Block Forms in Bucket / Oversized Cubes

1

Icemaker not level.  Level icemaker.

2

Unit not level.  Level unit

3

Water supply not constant 20-120 psi.  Instruct customer.

4

Water froze in inlet tube.  Remove ice from tube.  Check
for power from control board to fill tube heater; Fill tube
heater = 2850-3890

Ω

.

5

Defective water valve. Valve =160-165

Ω.

Replace valve.

6. Improper fill signal from control board; replace control

board.

Ice Cubes Hollow or Small

1

Icemaker not level.  Level icemaker.

2

Unit not level.  Level unit

3

Water supply not constant 20-120 psi.  Instruct customer.

4

Too little thermalmastic on thermostat.  Add thermalmastic.

5

Defective thermostat (Open = 48°F ±6°, Close = 15°F ±3°).
Replace icemaker.

6. Improper fill signal from control board; replace control

board.

Too much Ice

1

Shut off arm/linkage bent, broken or disconnected. Repair,
replace o reconnect arm/linkage. 

2

If ejector blades rotate with arm in up/OFF position =
Icemaker faulty.  Replace icemaker.

Summary of Contents for BI Series

Page 1: ...Icemaker Information 77 subzero com 800 222 7820 BI Service Manual ...

Page 2: ...e motor gear and is attached to the timing cam Timing Cam The timing cam is attached to the tim ing gear and the ice ejector is inserted into the center of the timing cam As the timing cam rotates high and low spots on the cam operate the water valve solenoid switch and the holding switch The timing cam also moves the lever arm side to side and rotates the ice ejector Ice Mold The ice mold is wher...

Page 3: ...R OPERATION The following series of electrical schematics illustrate a typical icemaker cycle of operation Below each schematic is a diagram indicating the approximate loca tion of the ice ejector and ice level arm during the phase the schematic indicates Freeze Phase of Ice Making Cycle See Figure 6 2 The ice mold is filled with water The thermostat is open No icemaker components are energized Fi...

Page 4: ...E EJECTOR AND ICE LEVEL ARM DURING OPERATION 115 VOLTS 60 CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C TCO ICE MOLD ICE BUCKET ICE Figure 6 4 First Revolution Continued APPROXIMATE POSITION OF ICE EJECTOR AND ICE LEVEL ARM DURING OPERATION 115 VOLTS 60 CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID ...

Page 5: ...SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C TCO ICE MOLD ICE BUCKET ICE Figure 6 6 First Revolution Continued APPROXIMATE POSITION OF ICE EJECTOR AND ICE LEVEL ARM DURING OPERATION 115 VOLTS 60 CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C ICE MOLD ICE BUCKET I ...

Page 6: ...LES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C ICE MOLD ICE BUCKET ICE TCO Figure 6 8 Start of Second Revolution APPROXIMATE POSITION OF ICE EJECTOR AND ICE LEVEL ARM DURING OPERATION 115 VOLTS 60 CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C ICE MOLD ...

Page 7: ... CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C C ICE MOLD ICE BUCKET ICE IC E TCO Figure 6 10 Second Revolution Continued APPROXIMATE POSITION OF ICE EJECTOR AND ICE LEVEL ARM DURING OPERATION 115 VOLTS 60 CYCLES SHUT OFF SWITCH THERMOSTAT MOLD HEATER WATER SOLENOID SOLENOID SWITCH MOTOR HOLDING SWITCH NO NC C NC NC NO NO C ...

Page 8: ...it does not start the drive motor If the shut off arm has come to rest on top of the ice in the storage bin as illustrated the shut off switch remains in the normally closed position This interrupts power from reaching the thermostat until sufficient ice has been removed from the stor age bin allowing the shut off arm to lower NOTE To allow ice to freeze fully and reduce effects of low water press...

Page 9: ...ystem OFF then again to switch it back ON Manual Start Procedure 1 Pry the icemaker front cover from the support using a flat blade screwdriver or coin 2 With a flat blade screwdriver turn the drive gear counterclockwise until the holding switch is activat ed completing the circuit to the drive motor this will be about a 1 8 turn See Figure 6 13 The icemaker will then complete its cycle automatica...

Page 10: ...cification as non filtered systems ae are rated at 20 100 psi ICEMAKER TROUBLESHOOTING No Slow Ice Production 1 Ice maker system switched OFF Switch system ON 2 Shut off arm in up OFF position Move to ON position 3 Freezer too warm Check temp s see troubleshooting guide in service manual 4 Poor airflow over icemaker Remove obstructions 5 Ice cube jam Remove ice 6 Water froze in inlet tube Remove i...

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