F'real FRLB4, Service Manual

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A. Ensure the wires are seated in the connector securely.
B. Check the wiring harness for damage or breaks in the wiring insulation.
C. Check the wiring on the LVCB. The connection point on the LVCB is in the upper left corner and labeled as TB18.
Ensure the wires are securely in place in the connector and the board.
3. Measure the resistance of the thermistor at the control board. Disconnect the TB18 connector and measure the
resistance through the purple wires. It should measure 3K
- 10K ohms. If out of range, replace BF Steamer Heater (Parts
Manual: Heaters & Position Motor).
Error 70: Chamber Thermistor Shorted or Open
TRIGGER: A short or open of the chamber thermistor is detected by the LVCB
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds to soft - reset the blender .
2. Check the Chamber Thermistor wires and connector. The thermistor is located by removing the left side panel. The
thermistor is located at the lower left corner of the chamber. The wires are black and attached to the blending chamber
behind a small metal shield and a foam piece.
A. Ensure the wires are seated in the connector securely.
B. Check the wiring harness for water damage or breaks in the wiring insulation.
C. Check the wiring on the Low Voltage Control Board (LVCB). The connection point on the LVCB is in the upper left
corner and labeled as TB18. Ensure the wires are securely in place in the connector and the board.
3. Measure the resistance of the thermistor on the LVCB. Disconnect the TB18 connector and measure the resistance
through the blue wires. It should measure 3k
- 10K ohms. If out of range, replace Chamber Thermistor (Parts Manual:
Glossary).
Error 71: Scour Thermistor Shorted or Open
TRIGGER: A short or open of the scour is detected by the LVCB
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds
to soft - reset the blender
.
2. Check the Scour Thermistor wires and connector. The thermistor is located by removing the left, right and rear panels.
The thermistor is located at bottom of the smaller heater. The wires are red.
A. Ensure the wires are seated in the connector securely.
B. Check the wiring harness for damage or breaks in the wiring insulation.
C. Check the wiring on the Low Voltage Control Board (LVCB). The connection point on the LVCB is in the upper left
corner and labeled as TB18. Ensure the wires are securely in place in the connector and the board.
3. Measure the resistance of the thermistor at the control board. Disconnect the TB18 connector and measure the
resistance through the red wires. It should measure 3
- 10K ohms. If out of range, replace Scour Heater (Parts Manual:
Heaters & Position Motor).
Error 74: Time - Out Occurred During Homing
TRIGGER: Any homing time - out parameter exceeded
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds
to soft - reset the blender
.
2. Verify that the travel path of the Cup Holder is clear. Remove any obstacles.
3. Bring up the LVCBS Status Screen (Press the “Left Arrow” & “OK” buttons for 7 seconds until the Status Screen appears on
the screen) and locate Line Q: “HomeSn: 1/0”
A. If the Cup Holder is in its home position and “HomeSn: 1”, proceed to Step 4.
B. If the Cup Holder is in its home position and “HomeSn: 0”, replace Through - Beam Sensor (Parts Manual: Switches,
Sensor & Solenoid Lock) and proceed to Step 4.
4. Inspect the back of the Accumulator Tank to verify there is no leak coming out of the metal fitting that could short out the
sensor.
If there is a leak, replace Accumulator Tank (Parts Manual: Water System).
5. Check to see if the Cup Holder will re - home:
A. Turn the blender off, manually pull up on the Cup Holder 3 - 4 inches. Turn the blender back on. The Cup Holder
should re - home, or lower back down, after the boot up process. If the Cup Holder doesn't return to the home
position, replace Position Motor (Heaters & Position Motor).