LS ELECTRIC G100 Troubleshooting Manual
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LS ELECTRIC G100 Troubleshooting Manual

Ac variable speed drive 0.4-7.5kw, 200v,400v
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0.4~7.5kW(200V,400V)
AC Variable Speed Drive
G100 Troubleshooting Manual
Safety Instructions
Read this manual carefully before servicing or inspecting this equipment.
Keep this manual within easy reach for quick reference.
.

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Summary of Contents for LS ELECTRIC G100

  • Page 1 0.4~7.5kW(200V,400V) AC Variable Speed Drive G100 Troubleshooting Manual Safety Instructions Read this manual carefully before servicing or inspecting this equipment.  Keep this manual within easy reach for quick reference. ...
  • Page 2 Quick Reference Table The following table listed situations frequently encountered while working with inverters. Refer to the typical situations to quickly and easily locate solutions to your questions. Situation Reference The motor is too noisy. P. 30 I want to review recent fault trip and warning histories. P.

  • Page 3: Table Of Contents

    INTRODUCTION PRODUCT IDENTIFICATION ASSOCIATION MANUAL SAFETY INFORMATION REVISION RECORD Contents 1 BASIC CHECKLIST 1.1 Before You Think It Failed 1.2 Basic Operations 1.3 Change Parameter 1.3.1 Change Carrier Frequency 1.3.2 Initialize All Parameters 1.4 Monitor Fault Trip 2 TROUBLESHOOTING 2.1 Trips and Warnings 2.1.1 Failure/Warning List 2.1.2 Troubleshooting Fault Trips 2.2 Troubleshooting Other Faults...

  • Page 4: Introduction

    2.1.1 Failure/Warning List trips and other common faults. 2.1.2 Troubleshooting Fault Trips If problems are not solved, please contact 2.2 Troubleshooting Other Faults your vendor or LS ELECTRIC. 3 Maintenance 3.1 Regular Inspection List 3.1.1 Daily Inspections This section provides information on 3.1.2 Annual Inspections...

  • Page 5: Product Identification

    O – UL Open Type E – UL Type 1 specifications EMC Filter N – Non EMC F – Built-in EMC specifications Reactor N – Non-Reactor specifications Association Manual G100 user manual can be downloaded through LS ELECTRIC homepage. Link : https://www.ls-electric.com/support/download-center...

  • Page 6: Safety Information

    Safety Information Read and follow all safety instructions in this manual precisely to avoid unsafe operating conditions, property damage, personal injury, or death. Safety symbols in this manual Danger Indicates an imminently hazardous situation which, if not avoided, will result in severe injury or death.
  • Page 7 Warning This equipment must be grounded for safe and proper operation.  Do not supply power to a faulty inverter. If you find that the inverter is faulty, disconnect the  power supply and have the Inverter repaired. The Inverter becomes hot during operation. Avoid touching the Inverter until it has cooled ...

  • Page 8: Revision Record

    Revision Record Changed main Version Date Reference Page contents First edition V1.0 2019.09...

  • Page 9: Basic Checklist

    Basic Checklist 1.1 Before You Think It Failed Items Check Point Result Is the installed location appropriate? Installed Does the environment meet the inverters operating conditions? Environment / Input/Output Does the power source match the inverter’s rated input? voltage Is the rated output of the inverter sufficient to supply the equipment? Is the circuit breaker installed on the input side of the inverter? Is the circuit breaker correctly rated? Are the power source cables correctly connected to the R/S/T terminals...
  • Page 10 1. Basic Checklist Items Check Point Result Are STP (shielded twisted pair) cables used for control terminal wiring? Is the shielding of the STP wiring properly grounded? If 3-wire operation is required, are the multi-function input terminals defined prior to the installation of the control wiring connections? Did you wire the control cables after setting the parameters? Control Terminal Wiring...

  • Page 11: Basic Operations

    1. Basic Checklist 1.2 Basic Operations  About the Keypad The keypad is composed of two main components – the display and the operation (input) keys. Refer to the following illustration to identify part names and functions.  About the Display The following table lists display part names and their functions.
  • Page 12 1. Basic Checklist The table below lists the way that the keypad displays characters (letters and numbers). Number/ Number/ Number/ Number/ Display Display Display Display character character character character  Operation Keys Key name Function Description [RUN] Used to run the inverter. STOP: Stops the inverter.

  • Page 13: Change Parameter

    1. Basic Checklist 1.3 Change Parameter 1.3.1 Change Carrier Frequency The following example demonstrates how to configure carrier frequency by modifying CN.4 from 15Hz to 5 Hz. It is possible to configure the parameters for different codes in any other group in the same method.
  • Page 14 1. Basic Checklist 1.3.2 Parameter Initialization The following example demonstrates parameter initialization using code dr.93 (Parameter Initialization) in the Drive group. Step Instructions Keypad Display dr.0 Go to code 0 in the Drive group. Press the [ENT] key. The current parameter value "9" will be displayed. To make the target value "93", press the [▼] key to change the ones' place value to "3".

  • Page 15: Monitor Fault Trip

    1. Basic Checklist 1.4 Monitor Fault Trip The following shows an example procedure how to monitor trips in Operation group. Acceleration Over Current Trip Current (A) Frequency Refer to the example keypad display. An over current trip fault has occurred. Press the [ENT] key, and then the [▲] key.
  • Page 16 1. Basic Checklist  Multiple Failures at the same time It is possible to review the information of maximum 3 Trips when multiple trips occurred at the same time. Over load Simultaneous trips Over Voltage Over Current  Check Trip History The table below is an example how to monitor trip history.

  • Page 17: Troubleshooting

    Fatal: After the fault is corrected, the trip or warning signal disappears when conducted the following procedure. Turn off the Inverter and wait until the charge indicator light goes off. Then, turn on the Inverter. If the Inverter still failed, please contact the supplier or LS ELECTRIC Customer Service Center.

  • Page 18: Failure/Warning List

    2. Troubleshooting 2.1.1 Failure/Warning List The following table shows a list of faults and warning signals that can occur while operating G100. Category KPD Display Details Page (Over Current1) o c t Trip from overcurrent P. 21 ((Over Voltage) o v t Trip from overvoltage P.
  • Page 19 2. Troubleshooting Category KPD Display Details Page (Under torque trip1) u t d 1 Trip from Under torque 1 (Over torque trip2) Trip from Over torque 2 o t d 2 (Under torque trip2) Trip from Under torque 2 u t d 2 (Low Voltage) l v t Trip due to low voltage...
  • Page 20 2. Troubleshooting 2.2 kW 200 V. An over current trip (OCT) or over voltage trip (OVT) may occur during low resistance grounding.

  • Page 21: Troubleshooting Fault Trips

    2. Troubleshooting 2.1.2 Troubleshooting Fault Trips Refer to the following tables for solutions to fault trips or warnings. Keypad Display Type Description Occurs when the motor load exceeds the value that was set o l t Overload Trip Latch for the motor overload trip. Operation will resume after setting Pr.20 at a value other than 0.
  • Page 22 Refer to 3.1.4 Check Input/Output Module to identify the fault cause of the There is a fault with the output module output module (IGBT). (IGBT). DO NOT operate the inverter. Contact the retailer or the LS ELECTRIC Customer Service Center..
  • Page 23 2. Troubleshooting Keypad Display Type Description Overcurrent Occurs when the DC circuit in the inverter detects an o c 2 Latch Trip2 excessive short circuit current. Problem Solution Acc/Dec time is too short compared Increase Acc/Dec time. to the load inertia (GD2). Output lead is short circuit.
  • Page 24 The input wiring is faulty. Check the input wiring. The DC link capacitor needs to be Replace the DC link capacitor. Contact the retailer or the LS ELECTRIC replaced. customer service center. Keypad Display Type...
  • Page 25 2. Troubleshooting Keypad Display Type Description Occurs when the temperature of the heat sink exceeds the o h t Latch Overheat Trip specific value. Cause Solution There is a problem with the cooling Check whether there are any external substances (dust, etc.) in the system.
  • Page 26 (U/V/W terminal, current sensors, etc.) Occurs when there is a problem with the thermal (detecting) n t c Latch NTC Trip sensors in IGBT. Cause Solution Contact the retailer or the LS ELECTRIC customer service center. Hardware inspection is needed.

  • Page 27: Troubleshooting Other Faults

    2. Troubleshooting 2.2 Troubleshooting Other Faults Refer to the following tables for solutions other than fault trips or warnings. Setting parameters is not working. Problem Solution Stop the inverter and change to program mode and set The inverter is operating (inverter mode). the parameters.
  • Page 28 2. Troubleshooting The motor rotates in the opposite direction to the command. Problem Solution The wiring of the motor output cable is Check whether the output side is wired correctly to the incorrect. phase (U/V/W) of the motor. The rotation signal connection between the control circuit terminal (forward/reverse Check the forward/reverse rotation wiring.
  • Page 29 2. Troubleshooting The motor stopped when accelerated or connected to load. Problem Solution Reduce the load. The load is too high. Replace the motor and inverter appropriate to inverter capacity. The motor does not accelerate. / The acceleration time is too long. Problem Solution The frequency command is too low.
  • Page 30 2. Troubleshooting The deceleration time is too long even with the Dynamic Breaking resistor connected to the motor. Problem Solution The deceleration time is set too long. Change the setting accordingly. If there is no problem with motor parameters, this is due The motor torque is insufficient.
  • Page 31 2. Troubleshooting The motor vibrates intensely and does not rotate normally. Problem Solution Check the input voltage and stabilize the voltage. The phase-to-phase voltage of 3-phase power source is not balance. Check and test the insulation of the motor. The motor makes humming or loud noises. Problem Solution There is resonance between the motor’s...
  • Page 32 2. Troubleshooting The output frequency does not reach the target frequency. Problem Solution The target frequency is within the jump Set the target frequency higher than the jump frequency frequency range. range. The target frequency is higher than the upper Set the upper limit of the frequency command higher than limit of the frequency command.

  • Page 33: Maintenance

    3. Maintenance Maintenance This chapter covers regular inspections for different time periods, how to replace the cooling fan, and how to properly store and dispose Inverters. The surrounding environment highly affects the conditions of the inverters. Meaning, improper management will wear down the components and lead to malfunction.

  • Page 34: Annual Inspections

    3. Maintenance Check the Measuring Is the display value Check the rated, Voltmeter, Display display value device normal? managerial value ammeter, etc. on the panel Is there any Visual unusual vibration or inspection noise? Motor All clear Is there any Check for unusual smell overheat or...

  • Page 35: Bi-Annual Inspections

    3. Maintenance Part Category Check points Method Standard Equipment Is there any Visual damage on the All clear inspection resistors? Digital multimeter / Resistors Analog tester Remove one Must be within ±10% Check side and of the rated disconnection measure resistance Phase-to-phase Measure...

  • Page 36: Check Input/Output Module

    3. Maintenance 3.1.4 Check Input/Output Module How to check the diode module and IGBT module (0.4~7.5kW) Testing method 1) Disconnect all power cables (R,S,T) and motor output cables (U,V,W). 2) Before testing, check the discharge of electrolytic capacitor (DCP-DCN). 3) When the circuit is open, DMM will indicate high resistance (several MΩ). In some situations, the DMM may display a closed circuit (low resistance) and then show high resistance due to the capacitors.
  • Page 37 3. Maintenance  Example) Checking diode module and IGBT module Checking Diode D2 Measure the resistance of D2 by placing the red lead (positive terminal of DMM) on S phase and the black lead (negative terminal of DMM) on P. If the resistance indicated on DMM is several hundred kΩ...
  • Page 38 3. Maintenance Checking IGBT Tr6 1) Measure the resistance of Tr6 by placing the red lead (positive terminal of DMM) on N and the black lead (negative terminal of DMM) on V phase.  If the resistance indicated on DMM is several hundred kΩ or less, it is acceptable. 2) Measure the resistance of Tr6 by placing the read lead (positive terminal of DMM) on V phase and the black lead (negative terminal of DMM) on N.

  • Page 39: Replace Cooling Fan

    3. Maintenance 3.1.5 Replace Cooling Fan If the inverter continued to operate after the cooling fan trip took place, a protective function will be activated due to overheat in the cooling fan. Increase in temperature may reduce the lifespan of major components.
  • Page 40 3. Maintenance Replacement of 5.5~22kW Remove the fan cover by pressing the hook located by the arrow. Disconnect the fan wire and remove the fan from the inverter. Caution  Turn off the inverter before replacing the fan. There is a possibility of an electric shock due to the charge voltage.

  • Page 41: Storage And Disposal

    3. Maintenance 3.2 Storage and Disposal 3.2.1 Storage Store the products in the following conditions listed below (if not used for a long period of time).  Store the product in the same appropriate environmental conditions as in operation.  If the product will be stored more than 3 months, keep the ambient temperature between - 10℃~30℃...

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