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     Fanuc Series 0T/ 0M Troubleshooting Information/ Procedures/ Alarm codes
       
 
   Fanuc 0TC/ 0MC Maintenance Manual: B-61395E    
   Fanuc 0TD/ 0MD Maintenance Manual: B-62545E    
   Alarm List and Description      
   Absolute Pulse Coder (APC) Alarms: Alarm 3n0 through 3n7 (n = 1 - 8) 310, 320, 330, 311, 321, 331, 312, 322, 332, 313, 323, 333, 314, 324, 334, 315, 325, 335, 316, 326, 336, 317, 327, 337
 Troubleshooting steps: Alarm 3n0 (n = 1 to 8): Request for reference position return
  Alarm 3n1 to 3n6: Absolute Pulse Coder is faulty
  Alarm 3n7, 3n8: Absolute Pulse Coder Battery is low
  Alarn 3n9: Serial Pulse Coder is abnormal
  425, 435, 445, 416, 426, 436, 446, 417, 427, 437, 447, 490, 491, 494, 495
   Servo Alarms: Alarm 400 through 495 Alarm 400, 401, 402, 403, 404, 405, 406, 410, 420, 430, 440, 411, 421, 431, 441, 412, 422, 432, 442, 413, 423, 433, 443, 414, 424, 434, 444, 415,
 Troubleshooting steps: Alarm 400, 402, 406 and 490: Overload  
  Alarm 400, 403, 406 and 491: *DRDY signal turned OFF  
  Alarm 404, 405: *DRDY signal turned ON  
  Alarm 4n0 (n = 1 to 8): Excessive position error amount during stop  
  Alarm 4n1 (n = 1 to 8): Excessive position error during movement  
   Alarm 4n4 (n = 1 to 8): Digital Servo System is abnormal  
   Alarm 4n6 (n = 1 to 8): Disconnection Alarm  
  Alarm 4n7 (n = 1 to 8): Digital Servo Parameter settings abnormal  
       
   Spindle Alarm 408, 409    
Troubleshooting steps: Alarm 408: Serial Spindle link does not start normally  
  Alarm 409: Serial Spindle Alarm  
        
   Over travel Alarms 5n0 through 5n5, 520, 590, 591, 592, 593 510, 511, 512, 513, 514, 515, 520, 521, 522, 523, 524, 525, 530, 531, 532, 533, 534, 535, 540, 541, 542, 543, 545, 544
       
   System Alarm: 910 through 916, 920, 921, 922, 930, 940, 941, 945, 946, 950, 960, 998 910, 911, 912, 913, 914, 915, 916
Troubleshooting steps: Alarm 910 to 916: RAM Parity Error    
   Alarm 920, 921, 922: Watch dog alarm or RAM parity alarm  
  Alarm 930: CPU Error Alarm  
  Alarm 941: Incorrectly installed Memory Printed Circuit Board  
  Alarm 945: Serial Spindle communication Error  
  Alarm 960: SUB-CPU Error    
  Alarm 950: Fuse Blown    
  Alarm 998: ROM Parity Error    
       
   Reader/Puncher RS232 interface alarm: Alarm 85 to 87    
Troubleshooting steps: Check RS232 related parameter settings  
  Check RS232 cable