LS iV5L Fault Codes List

Troubleshoot your LS iV5L elevator drive with our updated guide. Learn to interpret lift-specific faults like OCT, OVT, and Encoder (ENC) trips, use DriveView 9, and reset faults safely.

LS iV5L Fault Codes Reference Table

Below is the complete list of protective functions and alarm codes for the iV5L series. Use this table to correlate the fault on your elevator controller or drive keypad with the necessary corrective action.

LS iV5L Fault Codes List

LS iV5L Fault Codes List

Fault Code and Meaning Cause and Remedy
Over Current

Priority: 4
Type: Latch		 Cause:
Displayed when inverter output current exceeds the specified fault current.

Remedy:
Refer to detailed troubleshooting section in manual.
Ground Fault

Priority: 3
Type: Latch		 Cause:
Displayed when a ground fault occurs in the inverter’s output, and current flow to ground exceeds the specified level.

Remedy:
Refer to detailed troubleshooting section in manual.
Over Voltage

Priority: 5
Type: Latch		 Cause:
Displayed when the internal DC voltage exceeds the specified value (820 VDC).

Remedy:
Refer to detailed troubleshooting section in manual.
Low Voltage

Priority: 9
Type: Level		 Cause:
Displayed when the internal DC voltage is less than the specified value (360 VDC).

Remedy:
Refer to detailed troubleshooting section in manual.
Over Load

Priority: 12
Type: Latch		 Cause:
Displayed when the inverter’s output current exceeds the specified motor rated current and overload trip time.

Remedy:
Refer to detailed troubleshooting section in manual.
Inv OLT

Priority: 16
Type: Latch		 Cause:
Displayed when the inverter has detected an overload and resultant overheating condition based on inverse time-limit thermal characteristics. Allowable overload rates for the inverter are 150% for 1 min.

Remedy:
Refer to detailed troubleshooting section in manual.
InvOver Heat

Priority: 10
Type: Latch		 Cause:
Displayed when the temperature of the inverter heat sink exceeds the specified value.

Remedy:
Refer to detailed troubleshooting section in manual.
InvThem OP

Priority: 19
Type: Latch		 Cause:
Displayed when the inverter thermistor detects a low temperature.

Remedy:
Refer to detailed troubleshooting section in manual.
MotOver Heat

Priority: 18
Type: Latch		 Cause:
Displayed when the motor temperature exceeds 130°C.

Remedy:
Refer to detailed troubleshooting section in manual.
MotThem Err

Priority: 20
Type: Latch		 Cause:
Displayed when a motor thermistor error occurs in the inverter thermistor.

Remedy:
Refer to detailed troubleshooting section in manual.
E-Thermal

Priority: 11
Type: Latch		 Cause:
Displayed when internal electronic protection detects a high temperature condition at the motor.

Remedy:
Refer to detailed troubleshooting section in manual.
External-B

Priority: 14
Type: Latch		 Cause:
Displayed when an external fault signal is generated.

Remedy:
Refer to detailed troubleshooting section in manual.
Arm Short / Arm Short-DB

Priority: 1
Type: Latch		 Cause:
Displayed when IGBT Arm or output fault occurs. Arm Short-DB is only displayed on the 11-22 kW models.

Remedy:
Refer to detailed troubleshooting section in manual.
Fuse Open

Priority: 2
Type: Latch		 Cause:
Displayed when circuit protection is activated by an IGBT fault.

Remedy:
Refer to detailed troubleshooting section in manual.
Encoder Err

Priority: 8
Type: Latch		 Cause:
Displayed when an encoder signal error occurs.

Remedy:
Refer to detailed troubleshooting section in manual.
(No Display Name / General)

Priority: -
Type: -		 Cause:
Displayed when an inconsistent motor error time is detected when compared to the PRT_11 setting.

Remedy:
Refer to detailed troubleshooting section in manual.
BX

Priority: -
Type: Latch		 Cause:
Displayed when the inverter output is blocked by a signal from the multifunction terminal.

Remedy:
Refer to detailed troubleshooting section in manual.
Over Speed

Priority: 21
Type: Latch		 Cause:
Displayed when the motor speed exceeds the specified maximum speed.

Remedy:
Refer to detailed troubleshooting section in manual.
COM Error

Priority: -
Type: Fatal		 Cause:
Displayed when communication between the inverter and the keypad is unavailable.

Remedy:
Refer to detailed troubleshooting section in manual.
HW-Diag

Priority: 13
Type: Latch		 Cause:
Displayed when a CPU error is detected.

Remedy:
Refer to detailed troubleshooting section in manual.
EEP Error

Priority: -
Type: Latch		 Cause:
Displayed when a data saving error occurs.

Remedy:
Refer to detailed troubleshooting section in manual.
FAN Error

Priority: 6
Type: Latch		 Cause:
Displayed when a cooling fan error is detected.

Remedy:
Refer to detailed troubleshooting section in manual.
BatRun Fault

Priority: 7
Type: Latch		 Cause:
Displayed when operation signals are lost during a battery power operation.

Remedy:
Refer to detailed troubleshooting section in manual.
Input PO

Priority: 17
Type: Latch		 Cause:
Displayed when a single phase of a 3-phase power supply is interrupted while the inverter is under load.

Remedy:
Refer to detailed troubleshooting section in manual.
Output PO

Priority: 15
Type: Latch		 Cause:
Displayed when the inverter does not produce an output current.

Remedy:
Refer to detailed troubleshooting section in manual.
SpdDev Err

Priority: 26
Type: Latch		 Cause:
Displayed when the difference between the motor speed and command speed is more than the specified value.

Remedy:
Refer to detailed troubleshooting section in manual.
Low Voltage2

Priority: 24
Type: Latch		 Cause:
Displayed when the internal DC voltage is less than the specified value during inverter operation.

Remedy:
Refer to detailed troubleshooting section in manual.
SAFETY A/B

Priority: 25
Type: Latch/Level		 Cause:
Displayed when there is a safety terminal wiring fault on the control board. The response can be set at either Latch or Level.

Remedy:
Refer to detailed troubleshooting section in manual.
A3 Safety

Priority: 23
Type: Latch		 Cause:
Displayed when an A3 Safety error is detected at a multifunction input.

Remedy:
Refer to detailed troubleshooting section in manual.
ADC Error

Priority: 27
Type: Fatal		 Cause:
Displayed when current calibration is incorrect when power is initially supplied to the inverter.

Remedy:
Refer to detailed troubleshooting section in manual.
Flr/FHM Data

Priority: 22
Type: Latch		 Cause:
Displayed when a floor height data error is detected or a floor height measurement failure occurs. Available only when the exclusive elevator mode is used.

Remedy:
Refer to detailed troubleshooting section in manual.
SINCOS Open

Priority: 28
Type: Latch		 Cause:
Displayed when EnDat signals Sin-, Cos-, Sin+, and Cos+ are not connected to a single or multiple lines.

Remedy:
Refer to detailed troubleshooting section in manual.
ENDAT ERROR

Priority: 29
Type: Latch		 Cause:
Displayed when EnDat signals for the Clock or Data lines are not connected or a communication error is detected.

Remedy:
Refer to detailed troubleshooting section in manual.
 

How to Read iV5L Faults via LCD Keypad & DriveView 9

Elevator systems require precise timing and feedback. The iV5L provides specialized diagnostic tools to monitor lift performance in 2026:

  • Fault History (PRT Group): The iV5L stores the last 5 trips. Navigate to the PRT (Protection) group to see the history. Selecting a trip and pressing ENT shows the motor RPM, current, and DC bus voltage at the time of the lift failure.
  • I/O Terminal Monitoring: Use the “Status Monitor” to verify if the Brake Acknowledge or Safety Chain signals are reaching the drive. This is the first step in diagnosing EXT (External) trips.
  • DriveView 9 for Lifts: Connect your PC via RS-485 to use DriveView. This software is essential for graphing the Speed Reference vs. Actual Speed waveform, which helps identify if “Start-up Jerks” or “Leveling Errors” are caused by tuning or mechanical friction.

General Troubleshooting Steps for Elevator Applications

Before resetting an iV5L drive in a lift application, perform these critical safety checks:

  1. Brake Control Verification: Many OCT (Overcurrent) faults in elevators are caused by the drive attempting to move the motor before the mechanical brake has fully released. Check the brake coil and the feedback contactor.
  2. Encoder Integrity (ENC): Elevators rely on closed-loop feedback. If you see an ENC fault, check the encoder coupling for slippage and ensure the shielding is grounded to prevent electrical noise from corrupting the position data.
  3. Regenerative Energy (OVT): Elevators act as generators when a heavy car goes down or an empty car goes up. If the drive trips on OVT (Overvoltage), check the health of the Braking Resistors and their thermal protection switch.

Frequently Asked Questions (FAQ)

Q: What is the difference between “OCT” and “OVT” on the iV5L?

A: OCT (Overcurrent) is usually a result of a mechanical jam, a short circuit, or the brake not opening. OVT (Overvoltage) occurs when the motor is being “pushed” by the load faster than the drive can dissipate the energy, common in unbalanced lift cars.

Q: How do I reset a fault on the LS iV5L?

A: For elevator safety, a fault should only be reset after a visual inspection. You can clear the trip by:

  • Pressing the RESET key on the drive’s LCD keypad.
  • Triggering the RST input via the elevator controller.
  • Cycling the main power (Wait until the internal capacitors discharge completely).

Q: Why does the drive show “LVT” during peak hours?

A: LVT (Low Voltage Trip) indicates that the building’s power supply dropped below the minimum limit. This often happens in older buildings when multiple lifts or high-power HVAC systems start simultaneously. Check the incoming line voltage under load.

Q: Does the iV5L support Absolute Encoders?

A: Yes, the iV5L supports various encoder types through optional expansion cards. If you change the encoder type, you must perform a Pole Tuning (TUNE) to align the drive with the motor’s magnets, or the drive will trip on ENC or OCT.

Comments

Post a Comment

Popular posts from this blog

Allen Bradley Kinetix 5500 Drive Fault Codes List

Complete guide to Allen Bradley Kinetix 5500 fault codes. Troubleshoot FLT codes, Single-Cable (DSL) feedback errors, shared bus faults, and perform diagnostics via Studio 5000. Kinetix 5500 Fault Codes Reference Table Kinetix 5500 Fault Codes Reference Table Kinetix 5500 Fault Codes Reference Table Fault Code and Meaning Cause and Remedy FLT S03 – MTR OVERSPEED FL Motor Overspeed Factory Limit Fault Cause: Motor speed has exceeded 125% of its maximum speed. Remedy: Check control loop tuning. FLT S04 – MTR OVERSPEED UL Motor Overspeed User Limit Fault Cause: Motor speed has exceeded motor overspeed user limit. Remedy: Check control loop tuning. Increase the Motor Overspeed UL attribute value. FLT S05 – MTR OVERTEMP FL Motor Overtemperature Factory Limit Fault Cause: Calculations based ...
Read more

Danfoss VACON 100 FLOW Drive Fault Codes List

Access the complete reference guide for Danfoss VACON 100 FLOW drive fault codes. Learn to diagnose Multipump communication errors, dry run faults, and use Vacon Live software. VACON 100 FLOW Fault Codes Reference Table VACON 100 FLOW Faults and Alarms VACON 100 FLOW - Fault Tracing Fault Code and Meaning Cause and Remedy Fault Code 1, ID 1 Overcurrent (Hardware Fault) Cause: There is too high a current (> 4 × IH) in the motor cable. a sudden heavy load increase a short circuit in the motor cables the motor is not the correct type the parameter settings are not properly made Remedy: Check the loading. Check the motor. Check the cables and connections. Make an identification run. Set the acceleration time longer (P3.4.1.2 and P3.4.2.2). Fault Code 1, ID 2 Overcurrent (Software Fault...
Read more

ABB ACH580 Drive Fault Codes List

Access the complete reference guide for ABB ACH580 HVAC drive fault codes. Learn to diagnose issues via the Hand-Off-Auto panel, BACnet integration, and Fireman’s Override. The ABB ACH580 is the industry-standard flagship drive for HVACR applications. Designed to control air handling units, cooling towers, and chillers, it ensures critical comfort and safety in buildings. When a malfunction occurs, the dedicated Hand-Off-Auto (HOA) control panel displays a 4-digit code alongside plain-text diagnostics, often integrated directly into the Building Management System (BMS). This guide provides the most updated reference to help you interpret these codes and maintain building environmental standards. ACH580 Fault Codes Reference Table Use the search bar below or browse the table to identify your specific error code: ABB ACH580 Drive Fault Codes List ABB ACH580 Drive Fault Codes List Fault Code and Meaning Cause and Remedy A2B1...
Read more