The submitted Mitsubishi MDS-B-SP-37 Spindle Drive Unit arrived with a brief but critical customer statement: “Display is black, and the machine will not start.”A short description that often hides a complex underlying issue. When a spindle drive ...
Repair Description
The received Yaskawa SGDB-10VD displayed the error A.C2 – Encoder Phase Detection Fault. The customer reported that the fault appeared intermittently, sometimes after five minutes, sometimes after one hour of operation. The mot...
The Yaskawa SGDV-120D01A Servopack was received from a customer with the complaint that an A.410 fault appeared instantly when the 400 V power was switched on. The unit showed no operation and remained in alarm state.
Initial visual inspection reve...
The incoming set consisted of a Yaskawa Converter VS-656 MR5 (CIMR-MR5N4037) and a Yaskawa Inverter VS-626M5 (CIMR-M5A40370-XXXX).When received, the inverter showed no signs of life, only the CHARGE LED was active, indicating partial DC bus voltage bu...
Customer Issue Description
The customer reported that the Servopack turns off by itself, even when the machine is idle and no load is applied. No active error appeared on the display. The issue occurred intermittently, sometimes immediately after p...
Initial Condition and First Observations
The Mitsubishi MDS-C1-SP-260 was sent to us with the fault “Power Module Overheat.” This alarm is quite common in the C1 spindle drives and almost always indicates a thermal imbalance in the power sectio...
The device was sent to us because on Monday morning, after the machine was switched on, the spindle drive remained dark and showed no function.No LEDs were lit, no reaction a classic case of total failure in the DC link or auxiliary voltage section.
...
Repair and Test Procedure at industrypart GmbH
The unit was received showing AL-30 on its display.Visual inspection revealed heavy thermal stress around the regenerative brake resistor area. The resistor body showed discoloration, indicating long-t...
Repair Story: Express Repair due to Overheat Alarm
A customer reported an “n” display (Power Module Overheat). The MDS-B-CV-110 arrived via express service due to production downtime. Temperature readings showed that the IPM module was overheat...
Initial Diagnosis and Observations.
The submitted Mitsubishi MDS-B-V24-3535 Servo Drive Unit exhibited a classic yet demanding fault pattern:“The drive became weak, and the axes started to shake under load.”
This behavior indicated instabili...