Troubleshooting Guide
How to Fix Zoomlion ZS4045DC Fault Code 91
2 Speed Coil Fault
Error Code: 91Equipment: Scissor Lift
Error Code 91 Diagnosis
What This Code Means
2 Speed Coil Fault
Possible Causes
- 1High/low speed selection solenoid coil failure
Recommended Solution
Check speed selector solenoid coil. Inspect wiring. Replace coil if open or shorted.
Verified Technical Content
This troubleshooting guide has been reviewed and verified by the China Lift Supply Technical Team. Our certified technicians specialize in Zoomlion equipment diagnostics and maintain accuracy based on official service documentation.
Reviewed by Christopher Ray, Technical Director
Parts & Tools You May Need
Based on this error code, these items may help with your repair
Digital Multimeter
ToolEssential for diagnosing voltage and current issues
Hydraulic Seal Kit
PartComplete seal kit for hydraulic cylinder repair
Popular Zoomlion Troubleshooting
Common error codes across Zoomlion equipment
0101010101
View All Zoomlion CodesInternal ECU Fault
ZS1930DC
Internal ECU Fault
ZS2632DC
Internal ECU Fault
ZS3246DC
Internal ECU Fault
ZS4045DC
Internal ECU Fault
ZS1530DC
ZoomlionZS4045DC
Zoomlion Scissor Lift
Machine Specs
Power SourceElectric (Lead-acid)
Lift Capacity770 lbs
Platform Size7ft 7in x 3ft 8in
Alternate NameZS1212DC
Why Trust This Guide?
- Based on official Zoomlion service documentation
- Verified by certified equipment technicians
- Updated with latest service bulletins