Yaskawa L1000 Elevator Drive – Fault Code Quick Guide

Working with the L1000? Here’s a simplified overview of common fault codes and what they mean, based directly on actual field data:

🔧 Control & Circuit Issues

CPF26–CPF34: Control circuit fault / poor circuit condition

CPF02: A/D converter fault

CPF03 / CPF23: Control board wiring issue

CPF06: EEPROM data error

⚙️ Speed & Encoder Abnormalities

dEv: Speed deviation too large (PG mode)

dv1: Z-phase pulse missing

dv2: Z-phase noise detected

dv3: Reverse rotation detected

dv4: Reverse prevention detection

⚡ Electrical & Output Faults

GF: Short circuit (output side)

LF: Output phase loss

LF2: Output current imbalance

oC: Overcurrent

🔌 External Input Faults

EF3–EF8: External fault signals (S3–S8 terminals)

EF0: External device alarm input

🧠 Communication & System Errors

CE: MEMOBUS communication fault

bUS: Option card communication error

Err: EEPROM write/read inconsistency

💡 Key Tip:

Most faults are linked to wiring, feedback signals, or parameter mismatch. Always start with connection checks + parameter verification before replacing parts.

If you're maintaining elevators with Yaskawa drives, this quick reference can help reduce downtime and speed up troubleshooting.