Fast Track Troubleshooting
Fast Track Troubleshooting
Fast Track Troubleshooting
Press Freezer button one Press Freezer button a Press Freezer button a
time at the Test Mode to second time to Force third time to Force Defrost
Force Compressor Run, Defrost of Fridge, meas- for Fridge & Freezer,
measure fan and com- ure defrost voltage at measure defrost voltages
pressor voltages at main main PCB at main PCB
PCB
Sales Mode, No Compressor Operation
Refrigerant Charge Press Power Freeze & Freezer temp buttons
Sealed System R134a 7.76 oz. simultaneously for 3 sec ( you will hear a “Ding
Dong”) to remove or put into Sales Mode. When in
the Sales Mode the Display will show "OF" "OF"
1
FLEX TRAY Ice Makers Shattered Ice – Flex Tray
When the initial power is applied, the ice tray will stand by for 2 When all ice shatters, it's because of a bad
hours. After the 2-hour standby time, the Ice Maker Sensor will check tray or ice cube temp that is too cold (lower
the temperature , when it is lower than 1.5Ԭ for more than 5 minutes, than -5 degrees). In some areas, there are
it will do a harvest, with or without ice in the tray, then fill with water. water issues that can also cause shattered
58 minutes after water is supplied to the Ice Tray, the Ice Maker cubes. The temp in the freezer should not
Sensor temperature will be checked. When the Ice Maker Sensor have any effect on this issue, as long as it’s
maintains lower than 1.5Ԭ for 5 minutes, it completes the harvest below 1.5 degrees F, as a properly installed
(if the ice bin is not sensed as full). sensor will not read the freezer temp, only the
Thermistor senses temperature to determine water fill on newer units water/ice temp.
Filling the tray Check the Ice tray for defects in the plastic.
After the water fill is completed, the ice maker sensor will evaluate the Ice that is too cold will shatter during
water volume one and a half minutes later. When it detects no or low harvest. This can be from the (1) sensor not
water level, it will add more water. First supply time will be 1.5 sec, reading the correct temp (2) or the sensor not
next one will be 1 sec and the last will be 2 sec. mounted correctly (3). By programming the
icemaker offset value to a lower number (4),
the board not understanding the reading.
Guide – Bin Full Ice Maker Test Button To check the sensor, you must check the tray
temp (not air temp) and compare it to the sen-
sor reading. The sensor should read 3.7 volts
at the main board connector when the cube
temperature is 1 degree. After the fill, the sen-
sor will read water temp 1.5 to 2.2 volts.
To clear offsets, put unit into Diagnostics
mode.
Ice Maker Thermistor Please note, some shattering is normal for
a flex tray icemaker.
DEFROST
This model series uses a Defrost Heater in the Fridge and the Freezer compartment that is part of the Evaporator Coil.
NOTE: Evaporator Covers May Break If Removed While Frozen To Coil. They must be replaced if there is any damage,
as this will cause “ice” to form at top or bottom of the evaporator coil or in the drains.
2
DC FAN MOTORS
Brushless DC Fan motors are used to save energy. The fans operate at two speeds. Fan speed information is read by
the Main PCB. If the fan speed exceeds 600 RPM or the speed is too slow, or stopped the fan drive circuit is disabled,
After 10 seconds the circuit tries again with 3 seconds of DC voltage. If the fan continues this activity for 5 cycles, 10
seconds off 3 seconds on, the fan drive circuit is disabled for 10 minutes.
TO TEST THE FAN CIRCUIT VOLTAGE.
Power off and back on to check the DC voltage to the motor, wait from 10 to 60 seconds for the fan voltage to kick in,
and then check fan voltage, the average reading is 9 VDC. If you get 3 seconds of voltage every 10 seconds for the 5
fan power up cycles, then the Main PCB is good.
NOTE: You may need to put unit in FORCED FREEZE mode to activate the fans/compressor.
If the fan blade is blocked by ice, then defrost and check the motor again, after removing power from the unit.
If the evaporator is ice blocked and thus blocking the air flow, the fan will over RPM and will be stopped. Remove ice
and check the motor again. If everything is clear around the fan blade then the motor would be at fault. Continuous fan
errors will be displayed on the front panel display. PLEASE NOTE: The door switches control the evaporator fan mo-
tors. Have them closed to test the motors. Delay time 10 – 60 seconds.
Ice Maker Sensor Error- open or short-circuit, connector failure. Cause is The voltage at MAIN PCB Sensor
I/M-SENSOR
also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
Refrigerator Room Sensor Error- open or short-circuit, connector failure. The voltage at MAIN PCB Sensor
R-SENSOR
Cause is also a temperature reading > 122°or < -58 ° F. betw een 4.5V~1.0V
DEFROST SENSOR OF R Ref. Defrost Sensor Error- open or short-circuit, connector failure. Cause is The voltage at MAIN PCB Sensor
ROOM also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
This error indicates the Refrigerator Evap Fan is not spinning at the correct Fan voltage at MAIN PCB shall be
R-FAN ERROR
RPM or the fan feedback line is open. betw een 7V~12V
This error indicates the Ice tray has not returned to level after an ice harvest.
I/M FUNCTION ERROR Replace I/M
The error is displayed after three failed attempts.
COOL SELECT ZONE Cool Select Zone Sensor Error- open or short-circuit, connector failure. The voltage at MAIN PCB Sensor
SENSOR Cause is also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
Disconnect defrost connector
Refrigerator Room defrost heater- open or short-circuit, connector failure, or
R-DEFROSTING ERROR from PCB, check resistance
defective temperature fuse/bi-metal. Defrost on over 80 minutes
Ambient Temp. Sensor Error- open or short-circuit, connector failure. Cause The voltage at MAIN PCB Sensor
EXT-SENSOR
is also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
Freezer Compartment Sensor Error- open or short-circuit, connector failure. The voltage at MAIN PCB Sensor
F-SENSOR
Cause is also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
Freezer Room Defrost Sensor Error- open or short-circuit, connector failure. The voltage at MAIN PCB Sensor
F-DEF-SENSOR
Cause is also a temperature reading > 122°or < -58 ° F betw een 4.5V~1.0V
This error indicates the Freezer Evap. Fan is not spinning at the correct RPM Fan voltage at MAIN PCB shall be
F-FAN ERROR
or the fan feedback line is open. betw een 7V~12V
This error indicates the Condenser Fan is not spinning at the correct RPM or Fan voltage at MAIN PCB shall be
C-FAN ERROR
the fan feedback line is open. betw een 7V~12V
Freezer defrosting heater- open or short-circuit, connector failure, or Disconnect defrost connector
F-DEFROSTING ERROR from PCB, check resistance
defective temperature fuse/bi-metal. Defrost on for over 80 minutes
Uart ERROR This error is not applicable, if the error is detected during diagnostic testing
No Repair Necessary
COMMUNICATION please ignore it.
L-M ERROR
Communication error w ithin the Main PCB Replace main PCB
COMMUNICATION
P-M ERROR Check w iring in door & cabinet,
Communication betw een the Main PCB and Keypad
COMMUNICATION Panel PCB, Main PCB
3
RS253
CN70 120 VAC
CN71 120 VAC
1-11 Dispenser/Water Tank HTR (Blu-Red)
7-(CN70-11) R-Fan (W/Blu-Red)
3 (Gry) Neutral
5-(CN70-11) Ice/Water Sol (Prp-Red)
5-11 Compressor (S/Blu-Red)
3-(CN70-11) Auger Mtr (Pnk-Red)
9-7 R-Def/Ice Pipe HTR (Wht-Org)
1-(CN70-11) Cube Sol (Yel-Red)
11 (Red) L1
13-7 F-Def HTR (Brn-Org)
CN50
Panel PCB
4-6 (Org-Blu)12 VDC
5-6 (Pnk-Blu) 5VDC
7-8 (Prp-Gry) Disp Ice Sw
CN90
CN10
1-2 I/M Motor (Red-Blk) 12 VDC
1-3 A/C Line
3-4 I/M Sensor (Wht-Wht) 2.3~3.3vdc
5-8 Test SW (Gry-S/Blu)
6-8 Horiz check SW (Blu-S/Blu)
CN72
7-8 Ice Check SW (Prp-S/Blu)
6-7 F-Fan (Yel-Gry) 10~11.1vdc
4-7 C-Fan (S/Blu-Gry) 8.3~10vdc
3 F-Fan Control (Blk) CN30
1 C-Fan Control (Red) 1-2 F-Door Sw (W/Red-Brn)
5-6 R-Door Sw (W/Blu-Brn)
3-(CN72-7) F Sensor (Yel-Gry) 3.5~4.2vdc
4-(CN72-7) F Def Sensor (Blu-Gry) 2.3~4.2vdc
7-(CN72-7) R Sensor (Gry-Gry) 2.4~2.8vdc
8-(CN72-7) R Def Sensor (Prp-Gry) 2~4.2vdc
4
RS253
CN72
VDC Gnd
12 VDC
12 VDC
CN90
5
RS253