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The regenerative discharge circuit may be faultyĪn error was detected in the RAM write/read test at power–up. When the magnetic contactor is turned on, the phase sequence of the power supply cannot be determined.Ī parameter has been specified incorrectly.Ībnormally high current in the L–and M–axis motors The input power supply of the main circuit has an imbalance. The frequency of the main circuit input power supply is abnormal.
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The main circuit power supply has an open phase.Īn error occurred in internal parameter data transfer processing. When the absolute pulse coder is used, the motor has not yet rotated through more than one turn after the first power–up. Reference position setting cannot be executed correctly. The regenerative discharge unit is heated. The offset of the current detection circuit of the main circuit DC link is excessive. Relay contacts for the dynamic brake is faulty.
#WHAT IS OVC ALARM IN FANUC ROBOT PARTS SERIAL#
The input power supply is abnormal (open phase) or the main circuit capacitor was not recharged within the specified time.Ī communication error for the serial pulse coder was detected. Servo motor has overheated (estimated value).Īverage regenerative discharge energy is too high (too frequent acceleration/deceleration) –The regenerative discharge circuit is abnormal. Regenerative discharge energy is too high. The temperature of the heat sink has risen. +5 VDC of the control circuit power supply is abnormally low.ĭC voltage of the main circuit power supply is abnormally low or the circuit breaker is tripped. The battery voltage of the absolute pulse coder is low. Inverter: control power supply undervoltage Internal cooling circuit failure, Overload, Input supply voltage imbalance, IPM failure, or control supply voltage decrease of the power module. The main circuit power module (IPM) has detected an overload, overcurrent, or control supply voltage decrease, overcurrent, or control supply voltage decrease. Input supply voltage imbalance, IGBT defective. Overcurrent flowed into the input of the main circuit. If blinking continues → Replace the cable.Īmplifier is ready (normal operating state)ĭC voltage of the main circuit power supply is abnormally high. The cable on the Servo Amplifier side connected.) (b) Disconnect the feedback cable (JF*) from the Pulsecoder, and then switch on the power. If blinking continues → Replace the Servo Amplifier. (a) Disconnect the feedback cable (JF*) from the Servo Amplifier, and then switch on the power. We will provide a fault diagnosis and a dependable 1-year warranty if you require FANUC servo repairs - or a new FANUC servo amplifier module or FANUC DC servo unit. Tri Star CNC Services can provide you with more information on the meaning of your alarms.