Brand: SIEMENS
Category: Control Unit
Document Type: Manual
Language: EN
Manual for NXAirS
Uploaded: Nov. 21, 2025, 8:14 p.m.
- Chapter 12: Safety Instructions: Emphasizes the importance of qualified personnel and adherence to safety rules when operating the switchgear. Highlights dangers associated with live parts and quick-acting mechanisms.
- Chapter 13: Operation: Details the operation of various components, including opening/closing doors, inserting/removing modules (SION), operating the circuit breaker and earthing switch, charging springs, and cable management. Includes specific procedures for using operating tools and safety precautions.
- Chapter 14: Service: Outlines maintenance procedures for the switch panel and SION module, including routine checks, lubrication, and cleaning.
- Chapter 15: Troubleshooting: Provides a table to diagnose and resolve common faults related to HV doors, removable parts, earthing switches, and circuit breakers.
Troubleshooting and error codes
| HV Door | Faults | Causes | Measures |
|---|---|---|---|
| The door of HV compartment cannot open. | HV door is locked. | Use key to release the lock. | |
| Removable part is not in test position. | Move the removable part to test position. | ||
| Padlock for movable door is not unlocked. | Take down the padlock for movable door. | ||
| The door of HV compartment cannot close. | Secondary plug of circuit breaker is not inserted into the socket. | Insert the plug into the socket. |
| Removable Part | Faults | Causes | Measures |
|---|---|---|---|
| Removable part cannot be moved to working position. | Circuit breaker (closed) | Operate the circuit breaker to open position. | |
| Operating handle is inserted into the manual operating hole of feeder earthing switch. | The operating handle shall be inserted into correct hole. | ||
| Feeder earthing switch is not disconnected. | Disconnect the earthing switch for feeder. | ||
| One interlock on control panel is not unlocked. | Unlock the interlock on control panel. | ||
| Removable part cannot be moved to test position. | Without control voltage. | Restore control voltage. | |
| Door for HV compartment is not closed. | Close the door for HV compartment. | ||
| Circuit breaker is in close position. | Operate the circuit breaker to open position. | ||
| Operating handle is inserted into the manual operating hole of feeder earthing switch. | The operating handle shall be inserted into correct hole. | ||
| Door for HV compartment is not closed. | Close the door for HV compartment. | ||
| Without control voltage. | Restore control voltage. |