Service Home Compact APL - Troubleshooting Guide - TG0052

Compact APL - Troubleshooting Guide - TG0052

9.3 Compact APL Troubleshooting Guide

Last updated: 10/10/2025

Compact APL - Troubleshooting Guide

TG0052

Revision A - 12/2025

Introduction

Controller Area Network (CAN) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other. This method is used to create satellite nodes grouped by function that can be expanded on without changing the core electronics.

  • Each board has a node ID selection switch [SW2] that must be set correctly.
  • Devices are connected in Daisy Chain.
  • Each board has a termination switch [SW1] that much be set correctly.

Note: The last device on the chain needs to be terminated.

Node ID Selection

Device Node ID Factory Setting
IO Board 3 N/A
CAN Autodoor 13 (D on selector) 9013.001
CAN Electric Vise 11 (B on selector) 9011.001
CAN Lube Panel 5 9005.001
CAN Spindle Head 7 9007.001
Legacy CAN Autodoor 9 9009.001
Compact APL 15 (F on the selector) 9015.001
Active Ballscrew Compensation 20 (4 on the selector) 9020.001

Symptom Table

Alarm / CAN code

 Possible Cause Corrective Action

Alarm 9105: IO BOARD COMMAND EXECUTION FAILURE

The machine outputs the following alarms with this alarm:

  • 2001.003: EMERGENCY STOP SWITCH ERROR
  • 2002: OPERATOR'S PENDANT EMERGENCY STOP SWITCH ERROR
  • 120: LOW AIR PRESSURE OR FLOW
 Outdated main I/O firmware.

Updated the main I/O firmware to the latest version.

Refer to the Firmware Update procedure.
Alarm 17.9920/18.9920: POSITION ERROR TOO LARGE Electrical connections to the C-APL AV or AU servo amplifiers may be swapped.
 Reference the C-APL electrical schematic below.
Alarm 9899: IOPCB CAN FAULT and/ or 9105: IO BOARD COMMAND EXECUTION FAILURE The CAN node I/O Configuration is incorrect. Update the I/O configuration via the I/O Config tab.
The incorrect CAN node is enabled. Verify that Factory Settings 9000.001 -> 9031.001 are set correctly. Only active nodes should be enabled.
The CAN PCB does not have power. Verify that the Low Volt Power supply is supplying power to the CAN PCB.
The CAN node Communication cable is disconnected. Power down machine for at least a minute. Verify all CAN communication cables are connected correctly.
The CAN Module ID Selector is incorrect. Power down machine for at least a minute. Set ID selector correctly. Power up machine.
The CAN Modules have incorrect termination. Power down machine for at least a minute. Verify that only last node in the chain is terminated. Power up machine.
The CAN Node needs to be reset. Disable CAN Node via 9000.001 -> 9031.001. If the machine recovers (I/O page isn’t “X”) after disabling a particular node, try to enable the node again.
Alarm 9798: IOPCB CAN FCT CRC MISMATCH A test of the internal CRC for the Factory Config Table (FCT) located on one of the CAN devices does not match the CRC for the machines FCT. This can happen due to power failure at a critical time or after replacement of a CAN board attached to the I/O board
  1. Press [POWER OFF].
  2. Put the USB memory device into the control.

    Note: The USB memory device must contain your Haas Control Key and the correct configuration files.

  3. Press [POWER ON].
  4. Press [DIAGNOSTIC].
  5. Go to I/O Config in the Diagnostics tab.
  6. Press [F3] to Update Config Table.
  7. Press [RESET] to continue. If the alarm does not clear, cycle the machine power.

The Main CRC and the Factory CRC are now the same.

 

Alarm 9704: CAN NODE INVALID COMMAND FOR MOTOR 1

CAN code [0x41]

 Motor was commanded on in both directions simultaneously. If using Macro programming, verify G-Code is not turning on both outputs.

Alarm 9706: CAN NODE COMMANDED CURRENT OUT OF RANGE

CAN code [0x43]

 Outdated CAN Board firmware. Update the CAN Board latest CAN firmware.

Alarm 9707: CAN NODE INVALID MAX VOLTAGE

CAN code [0x44]

Alarm 9708: CAN NODE MOTOR 1 SHORT DETECTED

CAN code [0x81]

 Cable Failure Replace the motor cable.
Board Failure Replace the Autodoor/Evise board. 
Motor Failure Replace the motor.
Alarm 9700: CAN BUS OFF ERROR Poor connection Verify CAN Bus Connetors are fully seated and termination resistor set correctly.
Short circuit on CAN Bus

Use multimeter to diagnose short circuit:

  1. Power down machine
  2. Disconnect all nodes
  3. Reconnect nodes one at a time while measuring resistance between CAN lines and 12V and Ground on the connectors
  4. Replace the node that results in a short circuit

Note: It should be 60 ohm between CAN-H and CAN-L

Alarm 9701: CAN NODE LOST COMMUNICATION WITH IO

CAN code [0x01]

 Old IO firmware. Load I/O firmware 4.09 or greater.
Poor connection  Verify CAN Bus Connectors are fully seated and termination resistor set correctly.
Alarm 9702: IO LOST COMMUNICATION WITH CAN NODE

CAN code [0x30]

 I/O mapping missing node Verify in I/O Config tab that the node is mapped. Get the latest configuration from portal.
Incorrect node enabled Verify that Factory settings 9000.001 - 9031.001 are only set to true for the nodes that are installed in the machine.
Node ID set incorrectly on node Select correct node ID on ID selection switch. Reboot the machine.
Node lost power Use a multimeter to verify that the node has power. Replace the power supply if necessary.
Poor connection Verify that the CAN Bus Connectors are fully seated and that the termination resistor set correctly.

Alarm 9703: INTERNAL FAULT
 		 Node Fatal alarm. Firmware has a non-recoverable alarm. Cycle node enable (90nn.001) or update config table in I/O page. The machine may need to be rebooted.
When trying to run the machine a yellow warning message appears saying "Please activate Light Curtain or Cell Safe". The correct safety parameter kit has not been applied to the machine. Order the corresponding Front Automation Safety or Side Automation Safety kits (93-1000997 or 93-1000996) and re-upload the configuration files from HBC.
AU axis noisy when the APL moves AU axis coupler not attached correctly. Realign the coupler to the motor and ballscrew. Reset the grid offset once this is done.
AU axis coupler is fractured.  The AU axis coupler will need to be replaced. Once the new coupler has been replaced and aligned, reset the grid offset for the AU axis.

Electrical Diagrams

Compact APL Electrical Schematic

   

CAN Bus sequence when a machine has a CAN E-Vise, Compact APL, and CAN Autodoor.

      

CAN Bus sequence when a machine has Active Ballscrew Compensation, CAN E-Vise, Compact APL, Motion Sensor, and CAN Autodoor.