Danfoss VLT HVAC Basic Drive Programming Manual

Also see for VLT HVAC: Instructions Operating instructions Design guide Instruction Operating instructions

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Danfoss VLT HVAC Basic Drive Programming Manual Manual pdf 75 page image

4 TroubleshootingA warning or an alarm is signalled by the relevant LED on thefront of the frequency converter and indicated by a code onthe display.A warning remains active until its cause is no longer present.Under certain circumstances operation of the motor may stillbe continued. Warning messages may be critical, but are notnecessarily so.In the event of an alarm, the frequency converter will havetripped. Alarms must be reset to restart operation once theircause has been rectified.This may be done in four ways:1. By using the [RESET] control button on the LCP.2. Via a digital input with the “Reset” function.3. Via serial communication.4. By resetting automatically using the [Auto Reset]function, which is a default setting for VLT HVACBasic Drive, see 14-20 Reset Mode.NOTEAfter a manual reset using the [RESET] button on the LCP,the [AUTO ON] or [HAND ON] button must be pressed torestart the motor.If an alarm cannot be reset, the reason may be that its causehas not been rectified, or the alarm is trip-locked (see alsotable on following page).CAUTIONAlarms that are trip-locked offer additional protection,means that the mains supply must be switched off beforethe alarm can be reset. After being switched back on, thefrequency converter is no longer blocked and may be resetas described above once the cause has been rectified.Alarms that are not trip-locked can also be reset using theautomatic reset function in 14-20 Reset Mode (Warning:automatic wake-up is possible!)If a warning and alarm is marked against a code in the tableon the following page, this means that either a warningoccurs before an alarm, or it can be specified whether it is awarning or an alarm that is to be displayed for a given fault.This is possible, for instance, in 1-90 Motor Thermal Protection.After an alarm or trip, the motor carries on coasting, and thealarm and warning flash on the frequency converter. Oncethe problem has been rectified, only the alarm continuesflashing.No. Description Warning Alarm Trip Lock Parameter Reference2 Live zero error (X) (X) 6-013 No motor (X) 1-804 Mains phase loss (X) (X) (X) 14-127 DC over voltage X X8 DC under voltage X X9 Inverter overloaded X X10 Motor ETR over temperature (X) (X) 1-9011 Motor thermistor over temperature (X) (X) 1-9013 Over Current X X X14 Earth fault X X X16 Short Circuit X X17 Control word timeout (X) (X) 8-0424 Fan Fault (Only on 400V 30-90kW) X X 14-5330 Motor phase U missing (X) (X) 4-5831 Motor phase V missing (X) (X) 4-5832 Motor phase W missing (X) (X) 4-5838 Internal fault X X44 Earth fault 2 X X47 Control Voltage Fault X X48 VDD1 Supply Low X X50 AMA Calibration Failed X51 AMA check Unom and Inom X52 AMA low Inom XTroubleshooting VLT HVAC Basic Drive Programming Guide74 MG.18.B1.02 - VLT® is a registered Danfoss trademark44