During elevator operation, the control system continuously monitors electrical signals, safety circuits, speed feedback, and running conditions. When an abnormal condition is detected, the elevator system will display a corresponding fault code to help maintenance technicians identify the problem.
For HITACHI elevator systems, fault codes provide important information about possible issues involving the main controller, safety circuit, brake system, encoder, speed monitoring, and door lock system.
Understanding these fault codes can help technicians improve troubleshooting efficiency and reduce elevator downtime.
Common HITACHI Elevator Fault Codes and Meanings
|
Fault Code |
Description |
| E10 | Main microcomputer fault |
| E11 | Sub microcomputer fault |
| E12 | Running contactor short circuit fault |
| E14 | Safety relay short circuit fault |
| E15 | Safety circuit open fault |
| E16 | Software WDT operation fault |
| E17 | Continuous three-time door opening lock fault |
| E20 | Brake contactor short circuit fault |
| E21 | Brake contactor disconnection fault |
| E22 | Running speed deviation fault |
| E23 | 40D relay fault |
| E25 | 40G relay fault |
| E26 | Program and data fault |
| E27 | Repeated fault |
| E30 | Rotary encoder disconnection fault |
| E32 | Overspeed / idle running protection |
| E34 | Landing door lock short circuit fault |
| E35 | Car door lock short circuit fault |
| E37 | Reverse running fault |
| E38 | Running contactor disconnection fault |
| E41 | Low-speed operation overspeed fault |
| E42 | 50B relay disconnection fault |
| E50 | High-speed operation overspeed fault |
| E51 | Starting speed abnormality |
| E54 | Micro leveling reverse overtravel fault |
| E55 | Forced deceleration switch fault |
| E56 | Micro leveling overspeed fault |
| E57 | Micro leveling overtravel fault |
| E58 | Low speed fault |
| E60 | Floor height measurement fault |
| E61 | DC48V power failure during operation |
Common Fault Categories
1. Safety Circuit Related Faults
Fault codes such as E15 Safety Circuit Open Fault usually indicate that the elevator safety chain has been interrupted.
Possible inspection points include:
- · Emergency stop circuit
- · Safety relay status
- · Safety switch operation
- · Wiring connection condition
The elevator will remain stopped until the safety circuit returns to normal.
2. Brake System Faults
Fault codes including:
- · E20 Brake Contactor Short Circuit Fault
- · E21 Brake Contactor Disconnection Fault
are related to brake control and feedback signals.
Maintenance inspection should focus on:
- · Brake contactor condition
- · Brake wiring
- · Brake feedback signal
- · Brake mechanical adjustment
3. Encoder and Speed Monitoring Faults
Codes such as:
- · E30 Rotary Encoder Disconnection Fault
- · E41 Low-Speed Overspeed Fault
- · E50 High-Speed Overspeed Fault
are usually related to elevator speed feedback.
Possible causes include:
- · Encoder cable connection problems
- · Encoder damage
- · Incorrect speed feedback signal
- · Mechanical installation issues
4. Door Lock Related Faults
Door-related faults include:
- · E17 Continuous Door Opening Lock Fault
- · E34 Landing Door Lock Short Circuit Fault
- · E35 Car Door Lock Short Circuit Fault
Common inspection items:
- · Door lock contact condition
- · Door lock wiring
- · Door operator operation
- · Door closing position
Importance of Proper Fault Diagnosis
HITACHI elevator fault codes provide a quick reference for maintenance engineers, but the actual repair process requires comprehensive inspection of electrical, mechanical, and control system conditions.
Correct diagnosis can help:
✔ Reduce unnecessary component replacement
✔ Improve maintenance efficiency
✔ Minimize elevator downtime
✔ Ensure safe elevator operation
For professional elevator spare parts, technical support, and modernization solutions, choose YuanQi Elevator Parts.
WhatsApp: 8618192988423
E-mail: yqwebsite@eastelevator.cn
Post time: Aug-14-2026