F'real FRLB4, Service Manual

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3. Open the front door and spin Mix Motor Spindle by hand to ensure it spins freely. If the spindle won’t turn or is difficult to turn,
replace
Mix Motor (Parts Manual: Mixer System).
4. Remove the right side panels and locate the High Voltage Control Board (HVCB). The board has a high voltage warning sticker.
Warning : To work in the electronics bay, turn the blender off and disconnect the blender from the outlet. There are dangerous
voltages in this area that include a risk of electrocution.
5. Ensure the wire harness from the Mix Motor is securely connected to the HVCB at TB6 on the right side of the board.
6. Check the Mix Motor Fuse. The fuse is located on the HVCB at F3 on the lower right side of the board. If the fuse is blown,
replace
HVCB (Parts Manual: Control Boards, Upper).
7. Measure DC voltages for Mix Motor on the HVCB at TB6.
A. At rest: Red wire pin to ground: 80 VDC, Black wire pin to ground: 80 VDC
B. In operation: Red wire to ground: 24 VDC, Black wire to ground: 80 VDC
C. If voltages are out of range, replace HVCB (Parts Manual: Control Boards, Upper).
8. Measure the resistance through the Mix Motor wiring. It should read 4K - 6k ohms. If out of range, replace Mix Motor (Parts
Manual: Mixer System).
Error 8B: Position Motor Open Circuit Detected
TRIGGER: Position Motor current is less than .05 amps during blend
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds to soft - reset the blender, take notice if
the Cup Holder moves during the reboot.
A. If it does not move, attempt to physically move the Cup Holder down.
a. If it moves, proceed to Step 2.
b. If it does not move, replace Position Motor (Parts Manual: Heaters & Position Motor).
2. Remove the right side panels and locate the Low Voltage Control Board (LVCB). It is the second board up, from the bottom.
Warning : To work in the electronics bay, turn the blender off and disconnect the blender from the outlet. There are dangerous
voltages in this area that include a risk of electrocution.
3. Ensure the wire harness leading from the Position Motor is securely attached to the Low Voltage Control Board at TB5.
4. Check the fuse for the Position Motor. The fuse is located on the LVCB at F1. If the fuse is blown, replace LVCB (Parts Manual:
Control Boards, Lower).
5. Measure DC voltages for the Position Motor on the LVCB at TB5.
A. At rest: Red wire pin to ground: 24 VDC. If Voltage is not present, replace LVCB (Parts Manual: Control Boards, Lower).
B. At rest: Black wire pin to ground: 0 VDC. If Voltage is present, replace both LVCB (Parts Manual: Control Boards, Lower)
and Position Motor (Parts Manual: Heaters & Position Motor).
6. Measure the resistance through the Position Motor wiring. It should read 5K - 7k ohms. If out of range, replace Position Motor
(Parts Manual: Heaters & Position Motor).
Error 8C: Pump Motor Open Circuit Detected
TRIGGER: Pump Motor current is less than .05 amps during blend
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds to soft - reset the blender.
2. Remove the right side panels and locate the High Voltage Control Board (HVCB). It has a high voltage warning sticker on it.
Warning : To work in the electronics bay, turn the blender off and disconnect the blender from the outlet. There are dangerous
voltages in this area that include a risk of electrocution.
3. Ensure the wire harness from the Pump Motor is securely connected to the HVCB at TB5 on the right side of the board.
4. Check the fuse for the Pump Motor. The fuse is located on the HVCB at F2 on the upper right side of the board. If the fuse is
blown, replace the
HVCB (Parts Manual: Control Boards, Upper).
5. Measure DC voltages for Mix Motor on the HVCB at TB6.
A. At rest: Red wire pin to ground: 82 VDC, Black wire pin to ground: 82 VDC
B. If voltages are out of range, replace HVCB (Parts Manual: Control Boards, Upper).
6. Measure the resistance through the Pump Motor wiring. It should read 8K - 9k ohms. If out of range, replace Water Pump Motor
(Parts Manual: Water System).
Error 8D: Accumulator Purge Volume Too High
TRIGGER: More than 4,000mL in 10 seconds from the Rotary Nozzles
1. Reset the blender by pressing “Regular” & “More Thick” buttons together for 7 seconds to soft - reset the blender.
2. Ensure water supply is on and regulated to 25 - 65 PSI.
3. Verify Water Pressure Regulator is installed correctly with an arrow pointing in the direction of the water flow. If damaged,
replace Water Pressure Regulator (Parts Manual: Glossary).
A. SN 19783D and later will have an Internal Water Pressure Regulator.