Troubleshooting (Mechanical Bin Control Only) - Hoshizaki KM-280MAH-E Service Manual

b) During operation, the controller board will only shut down the machine if a 15.8 KΩ signal
is received from the bin control during the first 5 minutes of the freeze cycle.
(1) If ice pushes the lever to the right after the first five minutes of the freeze cycle,
the controller board will allow the machine to complete the freeze cycle and the
following harvest cycle before shutting down the machine. This will prevent
incomplete batches of ice from forming on the evaporator.

3. Troubleshooting (Mechanical Bin Control Only)

a) Machine will not start
(1) Move dip switch No. 7 to the "OFF" position. If the machine starts up within a few
seconds, the bin control is the likely problem. If the machine does not start up,
refer to Section "IV. Service Diagnosis" to verify that non-bin control related issues
are resolved.
(2) Check to make sure shipping tape has been removed and the wires are connected
properly.
(3) Check to make sure no obstruction prevents the lever from moving to the bin empty
position.
b) Machine will not shut off
(1) Refer to Section "IV. Service Diagnosis" to verify that non-bin control related issues
are resolved.
(2) Dip switch No. 7 should be in the on position. If the switch is in the off position, the
controller board will not receive input from the bin control.
(3) Move the lever to the far right.
(a) If the machine does not shut off, check the resistance values of the resistor wire
harness. You should read approximately 15.8 KΩ between the black terminal and
the red terminal that connect to the K4 connector on the controller board, when the
lever is in the bin full position (far right). If this reads approximately 7.9 KΩ, the
resistors may be miswired. Switch the black and white wires in the terminal
housing or order a replacement wire harness.
(b) Check the stainless steel bracket that the bin control is mounted to.
(c) If the preceding items do not resolve the problem, replace the bin control
assembly.
27