Danfoss VLT DriveMotor FCP 106 Operating Instructions Manual

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6 Maintenance, Diagnostics and Troubleshooting6.1 MaintenanceUnder normal operating conditions and load profiles, thefrequency converter is maintenance-free throughout itsdesigned lifetime. To prevent breakdown, danger, anddamage, examine the frequency converter at regularintervals depending on the operating conditions. Replaceworn or damaged parts with original spare parts orstandard parts. For service and support, refer towww.danfoss.com/contact/sales_and_services/.6.1.1 Before Starting Repair WorkBefore starting repair work:1. Read the safety warnings in2. Disconnect the frequency converter from mains.3. Disconnect the frequency converter from externalDC supply, if present.4. Disconnect the frequency converter from motoras it can generate voltage when turned, forexample by windmilling.5. Wait for discharge of the DC link. For dischargetime, see Table 2.1.6. Remove the frequency converter from the motoradapter plate or wall mounting plate.6.2 List of Warnings and AlarmsAlarm/warningnumberFault text Warning Alarm Trip lock Cause of problem2 Live zero error X XSignal on terminal 53 or 54 is less than 50% of value set in6-10 Terminal 53 Low Voltage, 6-12 Terminal 53 Low Current,6-20 Terminal 54 Low Voltageor 6-22 Terminal 54 Low Current. Seealso parameter group 6–0* Analog In/Out4 Mains ph. loss X X X Missing phase on supply side or excess voltage imbalance. Checksupply voltage. See 14-12 Function at Mains Imbalance7 DC over volt X X Intermediate circuit voltage exceeds limit.8 DC under volt X X Intermediate circuit voltage is lower than “voltage warning low” limit.9 Inverteroverload X X More than 100% load for too long.10 Motor ETR over X X Motor is overheated due to more than 100% load for too long. See1-90 Motor Thermal Protection.11 Motor th over X X Thermistor or thermistor connection is disconnected. See 1-90 MotorThermal Protection.13 Over Current X X X Inverter peak current limit is exceeded.14 Earth Fault X X Discharge from output phases to ground.16 Short Circuit X X Short-circuit in motor or on motor terminals.17 Control wordtimeout X X No communication to frequency converter. See parameter group 8-0*Comm. and Options.25 Brake resistorshortX X27 Short circuited X X28 Brake check X X30 U phase loss X X Motor phase U is missing. Check the phase. See 4-58 Missing MotorPhase Function.31 V phase loss X X Motor phase V is missing. Check the phase. See 4-58 Missing MotorPhase Function.32 W phase loss X X Motor phase W is missing. Check the phase. See 4-58 Missing MotorPhase Function.38 Internal fault X X Contact the local Danfoss supplier.Maintenance, Diagnostics an... Operating InstructionsMG03L202 Danfoss A/S © Rev. 06/2014 All rights reserved. 296 6