Troubleshooting And Maintenance 6 - AutomationDirect

Troubleshootingand MaintenanceIn This Chapter.6page— Troubleshooting. 2— Monitoring Trip Events, History, & Conditions . 5— Restoring Factory Default Settings . 8— Maintenance and Inspection . 9— Warranty. 16

Troubleshootingand ty MessagesPlease read the following safety messages before troubleshooting or performing maintenance on the inverter and motor system.WARNING: Wait at least five (5) minutes after turning OFF the input power supplybefore performing maintenance or an inspection. Otherwise, there is the danger ofelectric shock.WARNING: Make sure that only qualified personnel will perform maintenance, inspection, and part replacement. Before starting to work, remove any metallic objects fromyour person (wristwatch, bracelet, etc.). Be sure to use tools with insulated handles.Otherwise, there is a danger of electric shock and/or injury to personnel.WARNING: Never remove connectors by pulling on its wire leads (wires for coolingfan and logic P.C.board). Otherwise, there is a danger of fire due to wire breakage and/orinjury to personnel.General Precautions and Notes Always keep the unit clean so that dust or other foreign matter does not enter theinverter. Take special care in regard to breaking wires or making connection mistakes. Firmly connect terminals and connectors. Keep electronic equipment away from moisture and oil. Dust, steel filings and otherforeign matter can damage insulation, causing unexpected accidents, so take specialcare.Inspection ItemsThis chapter provides instructions or checklists for these inspection items: Daily inspection Periodic inspection (approximately once a year) Insulation resistance test

SJ100 Inverter6–3Troubleshooting TipsSymptom/conditionProbable CauseSolution Is the frequency command source Make sure the parameterA 01 parameter setting correct? Is the Run command source A 02parameter setting correct?setting A 01 is correct. Make sure the parametersetting A 02 is correct. Is power being supplied to termi- Check terminals [L1], [L2],nals [L1], [L2], and [L3/N]? If so,the POWER lamp should be ON. Is there an error code E X Xdisplayed?The inverteroutputs [U], [V],[W] are not Are the signals to the intelligentsupplyinginput terminals correct?voltage. Is the Run Command active?The motor Is the [FW] terminal (or [RV])will not run.connected to [P24] (via switch,etc.)and [L3/N], then [U/T1],[V/T2], and [W/T3]. Turn ON the power supplyor check fuses. Press the Func. key anddetermine the error type.Eliminate the error cause,then clear the error (Reset). Verify the terminal functionsfor C 01 – C 06 are correct. Turn ON Run Commandenable. Supply 24V to {FW] or[RV] terminal, if configured. Has the frequency setting for F 01 Set the parameter for F 01been set greater than zero? Are the control circuit terminals[H], [O], and [L] connected to thepotentiometer?to a safe, non-zero value. If the potentiometer is thefrequency setting source,verify voltage at [O] 0V. Is the RS (reset) function or FRS Turn OFF the command(s).(free-run stop) function ON?Inverter outputs[U], [V], [W]are supplyingvoltage. Is the motor load too heavy?The optionalremote operatoris used (SRW). Are the operational settingsmotor independently.between the remote operator andthe inverter unit correct? Are the connections of outputThe direction of the motor isreversed. Reduce load, and test theterminals [U/T1], [V/T2], and[W/T3] correct? Is the phase sequence of the motorforward or reverse with respect to[U/T1], [V/T2], and [W/T3]? Check the operator typesetting. Make connections accordingto the phase sequence of themotor. In general:FWD U-V-W, andREV U-W-V. Are the control terminals [FW] and Use terminal [FW] for[RV] wired correctly? Is parameter F 04 properly set?forward, and [RV] forreverse. Set motor direction in F 04.Troubleshootingand MaintenanceThe table below lists typical symptoms and the corresponding solution(s).

6–4TroubleshootingTroubleshootingand MaintenanceSymptom/conditionProbable Cause If using the analog input, is thecurrent or voltage at [O] or [OI]?Solution Check the wiring. Check the potentiometer orsignal generating device. Is the load too heavy?The motor speed will not reachthe target frequency (desiredspeed).overload restriction feature(reduces output as needed). Is the inverter internally limitingthe output frequency? Is the load fluctuation too great?The rotation is unstable. Was power turned OFF after aInverter datais notcorrect.A parameterwill notchange afteran edit(reverts toold setting). Check max frequencysetting (A 04) Check frequency upper limitsetting (A 61) Increase the motor capacity(both inverter and motor). Is the supply voltage unstable? Fix power supply problem. Is the problem occurring at a partic- Change the outputular frequency?frequency slightly, or use thejump frequency setting toskip the problem frequency.The RPM of the motor does not Is the maximum frequency settingmatch the inverter outputA 04 correct?frequency setting. Does the monitor function D 01display the expected outputfrequency?No downloadshave occurred. Reduce the load. Heavy loads activate theparameter edit but before pressingthe Store key? Edits to data are permanentlystored at power down. Was the timefrom power OFF to power ON lessthan six seconds? Verify the V/f settings matchmotor specifications. Make sure all scaling (suchas A 11 to A 14) isproperly set. Edit the data and press theStore key once. Wait six seconds or morebefore turning power OFFafter editing data.A download tothe inverter wasattempted. Was the power turned OFF withinTrue for certainparameters Is the inverter in Run Mode? Some Put inverter in Stop ModeTrue for allparameters If you’re using the [SFT] intelligent Change the state of the SFTsix seconds after the displaychanged from REMT to INV?parameters cannot be edited duringRun Mode.input (software lock function)—isthe [SFT] input ON? Copy the data to the inverteragain, and keep power ONfor six seconds or more aftercopying.(press the Stop/reset key).Then edit the parameter.input, and check the B 31parameter (SFT mode).

SJ100 Inverter6–5Fault Detection and ClearingThe microprocessor in the inverter detects a varietySTOPRESETof fault conditions and captures the event, recordRunStoping it in a history table. The inverter output turnsRUNOFF, or “trips” similar to the way a circuit breakerSTOPtrips due to an over-current condition. Most faultsRESETFaultoccur when the motor is running (refer to theTripFaultdiagram to the right). However, the inverter couldhave an internal fault and trip in Stop Mode. Ineither case, you can clear the fault by pressing the Stop/Reset key. Additionally, you canclear the inverter’s cumulative trip history by performing the procedure “RestoringFactory Default Settings” on page 6–8 (setting B 84 00 will clear the trip history butleave inverter settings intact).Error CodesAn error code will appear on the display automatically when a fault causes the inverterto trip. The following table lists the cause associated with the error.ErrorCodeE 01E 02E 03E 04NameOver current event whileat constant speedOver current event duringdecelerationOver current event duringaccelerationCause(s)The inverter output was short-circuited, or the motorshaft is locked or has a heavy load. These conditionscause excessive current for the inverter, so theinverter output is turned OFF.The dual-voltage motor is wired incorrectly.Over current event duringother conditionsE 05Overload protectionWhen a motor overload is detected by the electronicthermal function, the inverter trips and turns OFF itsoutput.E 06Braking resistor overloadWhen the regenerative braking resistor exceeds theusage time allowance or usage ratio, the inverter tripsand turns OFF its output to the motor.E 07Over voltage protectionWhen the DC bus voltage exceeds a threshold, due toregenerative energy from the motor.E 08EEPROM errorWhen the built-in EEPROM memory has problemsdue to noise or excessive temperature, the invertertrips and turns OFF its output to the motor.E 09Under-voltage errorA decrease of internal DC bus voltage below a threshold results in a control circuit fault. This condition canalso generate excessive motor heat or cause lowtorque. The inverter trips and turns OFF its output.Troubleshootingand MaintenanceMonitoring Trip Events, History, & Conditions

Troubleshootingand Maintenance6–6Monitoring Trip Events, History, & ConditionsErrorCodeE1 0NameCause(s)CT (current transformer)errorIf a strong source of electrical interference is close tothe inverter or a fault occurs in a built-in CT (currenttransformer), the inverter trips and turns its outputOFF.CPU errorA malfunction in the built-in CPU has occurred, sothe inverter trips and turns OFF its output to themotor.External tripA signal on an intelligent input terminal configured asEXT has occurred. The inverter trips and turns OFFthe output to the motor.E1 3USPWhen the Unattended Start Protection (USP) isenabled, an error occurred when power is appliedwhile a Run signal is present. The inverter trips anddoes not go into Run Mode until the error is cleared.E1 4Ground faultThe inverter is protected by the detection of groundfaults between the inverter output and the motor uponduring powerup tests. This feature protects theinverter, and does not protect humans.E1 5Input over-voltageWhen the input voltage is higher than the specifiedvalue, it is detected 100 seconds after powerup andthe inverter trips and turns OFF its output.E21Inverter thermal tripWhen the inverter internal temperature is above thethreshold, the thermal sensor in the inverter moduledetects the excessive temperature of the powerdevices and trips, turning the inverter output OFF.E35ThermistorDue to low input voltage, the inverter turns its outputOFF and tries to restart. If it fails to restart, then thealarm trips to record the under-voltage error event.Under-voltage (brownout) with output shutoffLow input voltage caused the inverter to turn OFF themotor output and try to restart. If unsuccessful, a tripoccurs.E1 1E22E1 2---UNOTE: If an EEPROM error (E08) occurs, be sure to confirm the parameter data valuesare still correct. If the power is turned OFF while the [RS] (Reset) intelligent inputterminal is ON, an EEPROM error will occur when power is restored.

6–7SJ100 InverterTrip History and Inverter StatusThe following Monitor Menu map shows how to access the error codes. When fault(s)exist, you can review their details by first selecting the proper function: D 08 displayscurrent trip data, and D 09 displays trip history.2Monitor Menu2d 081d 0121FUNC.Errorexists?NoCurrent TripConditionsYesE 09FUNC.Trip HistoryError(n-1)exists?NoNohistoryYesError CodeFUNC.1 0.0d 09Output frequencyat trip point2E 03Previouserror #1FUNC.FUNC.FUNC.0.25Motor currentat trip pointFUNC.1 8 9.8DC bus voltageat trip pointFUNC.Error(n-2)exists?FUNC.No errorNohistoryYesE 05NoFUNC.Previouserror #2FUNC.Troubleshootingand MaintenanceWe recommend that you first find the cause of the fault before clearing it. When a faultoccurs, the inverter stores important performance data at the moment of the fault. Toaccess the data, use the monitor functions (D xx) and select D 08 for details about thepresent fault (En), or the error code for the past two trip events (En-1 and En-2) using theD 09 Trip History function.