Best BestReach BRR23030, Operation, Maintenance And Parts Manual, Page: 26 / 76

26
2) Check DC control voltage.
a) Check that the Green LED on the power supply is on. If LED is off and AC voltage is
present, check the ¾ amp and 2 amp fuses on the power supply board. If a fuse is
blown, repair any electrical shorts or overload conditions before continuing. If fuses
are not blown and the GREEN LED is not on, the power supply board has failed
b) If the GREEN LED is on, check for DC voltage at accumulation zones. If DC power
is present, LEDs on photoeyes should be lit. The AMBER LED on the accumulation
board should also be lit when that zone’s photoeye is blocked. If these LEDs are not
on, make sure all communication cables are plugged in. Check the communication
cable between power supply board and first zone accumulation board.
3) Check for AC power coming into the DC motor controller.
a) The neon lamp on the power supply board should be on whenever AC power is
supplied to the DC controller. If this lamp is off, and the RED LED on the power
supply board is also off, check the 15A fuse on the power supply board that powers
the DC controller. If this fuse is good, the relay on the power supply board is bad.
b) Check the AC fuse on the DC motor controller.
c) AC power can be verified with a voltmeter at the DC controller.
4) Check for DC power on the output side of the DC motor controller.
a) Check the DC fuse on the DC controller. If the DC fuse is good, the plug-in resistor
is in play and no DC voltage is present at the output of the DC motor controller, the
controller has failed. If the fuse is blown, the cause could be either a shorted
conductor, a motor drawing excessive current or a defective DC control unit.
ONE OR MORE ZONES WILL NOT RUN:
1) Check accumulation board for control voltage.
2) Check zone’s photoeye for proper functioning.
a) Observe photoeye’s LEDs. They are powered from the accumulation’s control
voltage. If none are on, the photoeye may not have power. Control voltage is
supplied to each accumulation board by the communication cable connected to the
previous modular connector. Check cable for broken wires or defectiveconnectors.
b) Block that zone’s photoeye. The AMBER LED on the accumulation board should
come on when the photoeye’s beam is broken
3) Verify Photoeye is properly aligned with reflector across bed (if applicable).
4) Check for DC voltage at the motor cable’s connector on the accumulation board.
a) If no voltage is present, check fuse. If the fuse is blown, check for shorts in the
motor cable and in the motor.
b) If voltage is present at the motor cable’s connector, the motor or cable is defective.
ONE PHOTOEYE STOPS TWO OR MORE ZONES:
1) Check photoeyes in zones that stop when the next zone’s photoeye is blocked.
2) Verify communications cable is secured.
3) Check alignment of photoeye and across bed reflector.
Troubleshooting: Conveyor Bed
(cont.)
(continued)