ABB ACS6000 Inverter IGCT Phase Module Replacement and Maintenance Guide

wire cutter

Electrical contact grease

Step 1: Disconnect the cooling hose

The phase module of ACS6000 is water-cooled. Find the coolant hose connector below the front of the module.

Operation: Pull the locking sleeve on the connector towards the front of the cabinet, while gently pulling out the hose. Prepare a cloth or container to catch a small amount of residual coolant.

Step 2: Disconnect the control from the fiber optic connection

Cut the zip ties that secure the fiber optic cable and power cord.

Handle fiber optic cables carefully: Fiber optic cables are extremely sensitive to dirt and bending. Do not touch the end of the fiber optic cable, grip the connector body and carefully remove it. Pay attention to the markings on the connector to ensure that it will not be plugged in incorrectly during subsequent recovery.

Unplug the control power and signal wires of the phase module.

Step 3: Remove the mechanical fixing bolts

There are two fixing bolts on each side of the phase module.

Use a suitable socket (usually 17mm or 19mm) and wrench to completely remove these bolts.

Step 4: Remove the phase module

Push the hydraulic lifting platform to the front of the cabinet, adjust its height, and make the platform level with the guide rail at the bottom of the phase module.

Warning: The module weighs approximately 190 kilograms! At least two people are required to cooperate or use auxiliary tools. One person observes while the other smoothly pulls the phase module out of the cabinet and onto the lifting platform. During this process, ensure that all disconnected hoses and cables have been released to avoid getting stuck or damaged.

Step 5: Check and prepare new/spare modules

Check the copper bar connection surface of the new module. If the surface is dry or shows signs of oxidation, a thin layer of electrical contact grease provided with the goods should be applied.

Step 6: Install the new phase module

This is the reverse process of disassembly. Ensure that all hoses and cables have given way and align the lifting platform with the cabinet rails.

Slowly and steadily push the module into the cabinet. When encountering resistance, it may be that the plug-in copper bar at the back of the module is engaging with the busbar socket inside the cabinet. Smoothly continue to push in until the module flange surface is fully aligned with the cabinet installation surface.

Install and cross tighten four M12 fixing bolts. Tightening torque: 40 Nm when connecting two copper bars; 60 Nm when connecting three or more copper bars.

Step 7: Restore all connections

Connect the control line and fiber optic cable first. Ensure that the connector is locked in place with a "click" sound and secured with a new cable tie.

Connect the cooling hose: Pull the locking sleeve back, cover the fixed end and release it, then push it forward until you hear a "click" to confirm the lock.

Step 8: Restore power supply and test

Remove all temporary grounding clips.

Close the cabinet door and reset the lock lever to the "locked" position.

According to the normal startup procedure, gradually restore the auxiliary power supply and main power supply, and observe the status information on the CDP control panel to confirm that the new module is running normally without any alarms or faults.

Common troubleshooting: using the status indicator light as a clue

During maintenance and operation, engineers often need to make preliminary diagnoses based on equipment status. Here are some key instructions:

1. Control panel (CDP) alarm and malfunction:

Alarm: The alarm light flashes. The alarm will not shut down, but it indicates the presence of an abnormal condition. If not addressed, it may develop into a malfunction. The alarm cannot be manually reset, and it will automatically clear after the problem disappears.

Fault: The alarm light is constantly on. The malfunction will cause the frequency converter to shut down and open the main circuit breaker (MCB). The fault must be resolved and the RESET button must be manually pressed before restarting.

Fault classification:

FC 1 (Class 1 fault): Serious fault, will open MCB.

FC 2 (Class 2 fault): Non critical fault, will not open MCB.

2. AMC (Application and Motor Controller) circuit board LED indicator lights:

The AMC board is the core of the control system. The LED status on it is the key to determining the health of the control system:

F (red): Illuminates to indicate the presence of a fault. If the software keeps on after loading, it indicates a system malfunction.

R (green): Running indicator light. It should be constantly on during normal operation. If turned off, the software is not running.

M (green): Constant light indicates modulation/operation.

P (green): The power indicator light should be constantly on.

T1, T2 (yellow): Flashing indicates normal data reception on DDCS (Distributed Drive Control System) channels 0 and 3.

3. Air air heat exchanger LED indicator light:

For air-cooled or auxiliary cooling units, the dual color LED on it provides status information:

Green LED on, red LED off: The heat exchanger is working properly.

Green LED off, red LED on: alarm status (such as fan failure, high temperature).