Danfoss VLT HVAC Drive FC 102 Design Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

WARNING 60, External interlockA digital input signal indicates a fault condition external tothe adjustable frequency drive. An external interlock hascommanded the adjustable frequency drive to trip. Clearthe external fault condition. To resume normal operation,apply 24 V DC to the terminal programmed for externalinterlock. Reset the adjustable frequency drive.WARNING 62, Output frequency at maximum limitThe output frequency has reached the value set in4-19 Max Output Frequency. Check the application todetermine the cause. Possibly increase the outputfrequency limit. Be sure the system can operate safely at ahigher output frequency. The warning clears when theoutput drops below the maximum limit.WARNING/ALARM 65, Control card over temperatureThe cutout temperature of the control card is 176° F[80°C].Troubleshooting• Check that the ambient operating temperature iswithin limits.• Check for clogged filters.• Check fan operation.• Check the control card.WARNING 66, Heatsink temperature lowThe adjustable frequency drive is too cold to operate. Thiswarning is based on the temperature sensor in the IGBTmodule.Increase the ambient temperature of the unit. A trickleamount of current can be supplied to the adjustablefrequency drive whenever the motor is stopped by setting2-00 DC Hold/Preheat Current at 5% and 1-80 Function atStop.ALARM 67, Option module configuration has changedOne or more options have either been added or removedsince the last power-down. Check that the configurationchange is intentional and reset the unit.ALARM 68, Safe Stop activatedLoss of the 24 V DC signal on terminal 37 has caused theunit to trip. To resume normal operation, apply 24 V DC toterminal 37 and reset the unit.ALARM 69, Power card temperatureThe temperature sensor on the power card is either toohot or too cold.TroubleshootingCheck that the ambient operating temperature iswithin limits.Check for clogged filters.Check fan operation.Check the power card.ALARM 70, Illegal FC configurationThe control card and power card are incompatible. Contactthe supplier with the type code of the unit from thenameplate and the part numbers of the cards to checkcompatibility.ALARM 71, PTC 1 safe torque offSafe torque off has been activated from the MCB 112 PTCthermistor card (motor too warm). Normal operation canresume when the MCB 112 applies 24 V DC to T-37 again(when the motor temperature reaches an acceptable level)and when the digital input from the MCB 112 isdeactivated. When that happens, a reset signal is sent (viaBus, Digital I/O, or by pressing [RESET]).ALARM 72, Dangerous failureSafe torque off with trip lock. The dangerous failure alarmis issued if the combination of safe torque off commandsis unexpected. This occurs if the MCB 112 VLT PTCThermistor Card enables X44/10 but safe torque off is notenabled. Furthermore, if the MCB 112 is the only deviceusing safe torque off (specified through selection [4] or [5]in 5-19 Terminal 37 Digital Input), an unexpectedcombination is activation of safe torque off without theX44/10 being activated. Table 8.26 summarizes theunexpected combinations that lead to Alarm 72. Note thatif X44/10 is activated in selection 2 or 3, this signal isignored. However, the MCB 112 is still able to activate safetorque off.ALARM 80, Drive initialized to default valueParameter settings are initialized to default settings after amanual reset. Reset the unit to clear the alarm.ALARM 92, No flowA no-flow condition has occurred. 22-23 No-Flow Functionis set for alarm. Troubleshoot the system and reset theadjustable frequency drive after the fault has been cleared.ALARM 93, Dry pumpA no-flow condition in the system with the adjustablefrequency drive operating at high speed may indicate adry pump. 22-26 Dry Pump Function is set for alarm.Troubleshoot the system and reset the adjustablefrequency drive after clearing the fault.ALARM 94, End of curveFeedback is lower than the setpoint. This may indicateleakage in the system. 22-50 End of Curve Function is set foralarm. Troubleshoot the system and reset the adjustablefrequency drive after the fault has been cleared.ALARM 95, Broken beltTorque is below the torque level set for no load, indicatinga broken belt. 22-60 Broken Belt Function is set for alarm.Troubleshoot the system and reset the after the fault hasbeen cleared.General Specifications and ... Design GuideMG16C122 Danfoss A/S © Rev. 2014-01-13 All rights reserved. 2358 8