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Fanuc Alpha Power Supply Alarm Codes for 6081, 6083, 6077, 6087, 6091, 6120, 6140 And 6110 Series PSU Modules. A drive status alarm appears on the 7 segment display “-” refers to drive not ready (Waiting for estop signal to power up) “0” refers to drive powered up and OK Any other number or letter on this status display is an alarm
AL01 The main circuit power module (IPM) has detected am Error (PSM-5.5,-11) AL02 A cooling fan for the control circuit has stopped AL03 The Temperature of the main circuit heat sink has risen abnormally AL04 In the main circuit the DC voltage (DC Link) has dropped AL05 The main circuit capacitor was not recharged within the specified time. A common alarm on installation of a new alpha power supply is a AL-05.
If you have this alarm it is worth checking the bus bar connector at the top of the power supply has all four screws in it. AL06 The Input Power Supply is abnormal (open phase) AL07 In the main circuit the DC Voltage at the DC link is abnormally high Fanuc Power Supply Unit - Fanuc Servo Drive - Fanuc Drive Card Axis - Fanuc Spindle Board Repair - Fanuc Parts - Alpha Drive Board - Fanuc Beta Motors - Fanuc Beta Servo - Fanuc Spare Parts - Fanuc alpha
Overcurrent flows into the input of the main circuit (PSM-15 to –30)