FBD 77 Series, Installation And Operation Manual

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Error #550: Excessive refrigeration pressure
1 The high side refrigeration pressures (as read on LCD display) during a freeze cycle should
not exceed 450 PSI.
2 Ensure dispenser has 3” clearance on sides and back and no obstructions overhead. Failure
to provide adequate clearances will result in poor airflow or the recirculation of hot discharge air
from the condenser.
3 Ensure the dispenser is not operating in temperatures over 104 deg F.
4 Ensure the condenser air filter is clean.
5 Refer to nameplate on the back of the dispenser for proper charge using 404A refrigerant.
Error #561, 562, 563, 564: Refrigeration solenoid not opening
Error #571, 572, 5
73, 574: Defrost solenoid not opening
1 Remove the wiring harness from the suspect solenoid.
2 Manually turn on the solenoid and check for 24 VAC at the wiring harness. Note: The voltage
will read ~19 VAC when not powered.
3 If 24 VAC is present then replace the solenoid.
4 If no voltage then replace the control board.
Error #581, 582, 583, 584: Beater motor not turning on
1 Remove the control board and check for blown motor fuses (Motor 1: F3 & F4, Motor 2: F5 & F6,
Motor 3: F7 & F8, Motor 4: F9 & F10). If a fuse is blown then motor or capacitor malfunction may
be possible.
2 If fuses are OK, reinstall control board.
3 Disconnect wiring harness from suspect beater motor.
4 Manually turn on beater motor and ensure there is line voltage on pins 1 & 3 of supply harness
(outside pins).
5 If correct voltage is present then substitute a “known to be good” capacitor and try to operate
motor again.
6 If motor fails to start with good capacitor then replace both motor and capacitor.
Error #591, 592, 593, 594: CO2 solenoid not opening
1 Disconnect the electrical harness from the CO2 solenoid for the barrel in question.
2 Manually activate the solenoid and check to make sure there is 12 VDC at the connection.
Note: The voltage will read ~2 VDC when not powered. If no voltage then replace the control
board.
3 If correct voltage is present then replace the solenoid. Be sure to turn off CO2 supply before
disconnecting the CO2 line from the solenoid.
4 If solenoid is functioning properly then a leak may be present in the product delivery system.
Check the relief valve, dispensing valve, rear seal and tubing in the product tray for leaks.
5 If no leaks are found then the tank pressure transducer may be defective.
Error #601, 602, 603, 604: Solution solenoid not opening
1 Disconnect the electrical harness from the suspect solution solenoid.
2 Manually activate the solenoid and check for 24 VAC at the connection. Note: The voltage will
read ~19 VAC when not powered. If no voltage then replace the control board.
3 If correct voltage is present then remove the solution module and then replace the solenoid.