BinLogic Ice Maker Controller Troubleshooting Guide

BinLogic Ice Maker Controller Troubleshooting

Use this guide to diagnose BinLogic 2.0 power, input, sensor, startup, operating-state, and flash-code faults on IHA Holiday ice makers.

Safety: The BinLogic controls equipment operating at hazardous voltage. Disconnect all power sources and verify zero voltage before opening panels, moving wiring, or replacing components. Only qualified personnel should test energized circuits.

1. Start with the Status LED

The external Status LED and Output 5 LED indicate the current operating state or retained fault. Each BinLogic input and output also has an onboard LED showing whether that point is ON or OFF.

Normal operating indications

  • Solid LED: The controller is idle or in standby.
  • Rapid continuous flashing: The controller is in the three-minute compressor safety delay after power-up or after the compressor stopped.
  • 1 flash: Make cycle.
  • 2 flashes: Harvest cycle.
  • More than 2 flashes, other than rapid continuous flashing: A fault code is present.

Before troubleshooting a fault

  • Confirm the BinLogic Power LED is ON.
  • Confirm Input 7 is ON when the toggle switch is in RUN.
  • Check Input 8. When Input 8 is ON, the machine may be held in standby by the bin-full circuit, thermostat, manual switch, leveler overload, or remote control.
  • Allow two to five seconds for input-state changes to be recognized.

2. Power or Startup Problems

BinLogic has no power

  • Verify the outside main breaker, ice-maker disconnect, and control-panel breakers are ON.
  • Check the BinLogic Power LED.
  • Verify the red and black supply wires are connected to T1 and T2 and to the BinLogic breaker with the correct voltage present.
  • If a three-phase monitor is installed, confirm its safety check and delay have completed and its relay is supplying power.
  • Inspect all terminal screws, crimps, plugs, and ground connections for loose or damaged wiring.

Controller flashes rapidly and will not start

Rapid flashing is normally the three-minute anti-short-cycle delay. Wait three full minutes from initial power-up or from the last time the compressor turned OFF.

Machine remains idle

  • Confirm the toggle switch is in RUN and Input 7 is ON.
  • Check Input 8. If it is ON, inspect the bin-full switch, thermostat, manual ice-maker switch, leveler overload, and remote-control circuit.
  • Remember that all inputs have an approximately two-second validation delay.

3. Installation and Configuration Checks

DIP switch settings

  • DIP switch 2 enables the contactor and crankcase-heater current checks. If enabled and either check fails, the ice maker will be prevented from operating.
  • DIP switch 1 enables water-flow and crusher-RPM checks. Turn it OFF when optional flow and RPM sensors are not installed.
  • Incorrectly enabling a check without the matching sensor can create a false fault.

Expected input states with power ON and toggle OFF

  • Input 1: ON. Pressing the low-pressure reset should make it turn OFF.
  • Input 2: ON. Pressing the high-pressure reset should make it turn OFF.
  • Input 3: ON. Activating or resetting the oil-pressure device should change its state.
  • Inputs 4 through 8: Normally OFF during this initial test.
  • Outputs 1 through 4: OFF.

Flow and RPM sensors

  • Water-flow sensor connects to Input 5. Input 5 should illuminate when the pump is running and adequate water is flowing.
  • Crusher-RPM sensor connects to Input 6. The sensor LED and Input 6 should illuminate while the crusher is rotating at sufficient speed.
  • The two-wire flow and RPM devices are not polarized, but each pair must be connected to the correct input.

RS485 monitoring communication

  • Verify the shielded two-core cable runs from BinLogic Rx(+)/Tx(-) to the PLC Serial Port 2 adapter A(+)/B(-).
  • Confirm polarity is correct and connections are secure.
  • Confirm the PLC serial port has been programmed by the monitoring provider to accept BinLogic data.

4. Resetting a Retained Fault

A fault must remain active for approximately two seconds before the BinLogic accepts it. Once accepted, the controller may retain the fault even after the safety switch resets.

  • Correct the condition that caused the fault.
  • Move the toggle switch to PUMP and wait for the pump to run.
  • Move the toggle switch to OFF and wait for the pump to stop.
  • Move the toggle switch to RUN to resume operation.

A power cycle can also clear a retained fault. Some older firmware versions may not retain low-, high-, or oil-pressure faults consistently.

5. Flash-Code Troubleshooting

3 flashes — Low-pressure fault

  • Input 1 has turned OFF because the low-pressure switch tripped.
  • Place the toggle in PUMP and confirm the pump runs and water flows over the evaporator tubes.
  • Inspect for other refrigeration or water conditions that can cause low suction pressure.
  • Reset the low-pressure switch and confirm Input 1 illuminates.
  • Use the retained-fault reset sequence.

4 flashes — High-pressure fault

  • The high-pressure switch has tripped.
  • Inspect condenser airflow, fan operation, coil cleanliness, ambient conditions, and other causes listed in the ice-maker service manual.
  • Manually reset the high-pressure switch and confirm Input 2 illuminates.
  • Use the retained-fault reset sequence.

5 flashes — Oil-pressure fault

  • Inspect the oil-pressure control or CoreSense and the compressor lubrication condition.
  • Manually reset the oil-pressure device and confirm Input 3 is ON.
  • For non-CoreSense systems, verify the added oil-pressure relay remains energized when no fault is present.
  • Use the retained-fault reset sequence.

6 flashes — Positive Harvest Control fault

  • The PHC input was not ON at the beginning of harvest or did not turn OFF within three minutes.
  • Inspect PHC pressure-switch wiring and operation.
  • The PHC input is normally ON and should turn OFF briefly during harvest.
  • Check whether the machine is actually entering harvest and whether suction pressure changes enough to operate the PHC.
  • Use the retained-fault reset sequence.

7 flashes — Water-flow fault

  • Water flow was not detected during the make cycle.
  • Move the toggle to PUMP and confirm the pump runs.
  • Confirm Input 5 illuminates while adequate water flows over the tubes.
  • Check supply-water pressure, pump operation, blocked tubing, flow-switch placement, and sensor wiring.
  • If no flow sensor is installed, turn DIP switch 1 OFF.

8 flashes — Crusher-rotation fault

  • Crusher rotation was not detected during harvest.
  • Inspect the crusher belt for looseness or breakage.
  • Check whether the crusher is bound by ice or a mechanical obstruction.
  • Confirm the RPM sensor LED and Input 6 illuminate while the crusher rotates.
  • If no RPM sensor is installed, turn DIP switch 1 OFF.
  • Use the retained-fault reset sequence.

9 flashes — Compressor-contactor fault

  • The BinLogic did not detect expected contactor current during make or harvest.
  • Verify the brown contactor wires are the only wires connected to the contactor coil as specified by the installation.
  • Check whether the BinLogic compressor-control relay is energizing.
  • On systems without CoreSense, inspect the oil-pressure switch because it can interrupt the contactor-coil circuit.
  • Test the contactor coil, contacts, wiring, and compressor-control circuit.
  • Confirm DIP switch 2 is configured correctly, then use the retained-fault reset sequence.

10 flashes — Crankcase-heater fault

  • The controller does not detect heater current while the compressor is OFF.
  • Verify the heater is connected to the BinLogic heater output and receives power when the compressor-control relay is OFF.
  • Inspect the heater wiring and test the crankcase heater.
  • Confirm DIP switch 2 is configured correctly, then use the retained-fault reset sequence.

11 flashes — Flush cycle after a fault

The flush cycle attempts to remove ice remaining on the tubes after another fault. The pump and crusher run briefly; the hot-gas valve remains OFF.

  • Move the toggle switch to OFF to stop the flush cycle. The Status LED should then display the original fault code.
  • Diagnose and correct the original fault.
  • Use the retained-fault reset sequence.

6. Startup Sequence Checks

  • The machine always begins with a harvest cycle after a cold start.
  • After the three-minute safety delay, the crusher and hot-gas valve should operate with the compressor.
  • After approximately 30 seconds, the crusher and hot-gas valve turn OFF; the pump and fan relay turn ON.
  • At least one condenser fan should operate. A second fan may start as pressure rises.
  • The make cycle should last approximately seven minutes before returning to harvest.
  • During harvest, the controller waits for the PHC to turn OFF, then continues harvest for approximately 30 seconds.

7. Information to Collect Before Escalation

  • Machine name and address.
  • BinLogic firmware or hardware version.
  • Exact Status LED flash count and whether the code remains after reset.
  • State of Inputs 1 through 8 and Outputs 1 through 5.
  • DIP switch 1 and DIP switch 2 positions.
  • Whether flow and RPM sensors are installed.
  • Voltage readings at the BinLogic supply, pressure-switch inputs, contactor coil, and heater circuit.
  • Photos of the BinLogic terminals, condenser-panel wiring, pressure controls, contactor, relays, and sensor mounting.
  • Whether the machine completes the startup harvest, make cycle, and PHC transition.
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