VLT ® 2900 Series voltage). A voltage warning can occur when the con- nected mains voltage is too high. Check whether the supply voltage is suitable for the frequency converter, see Technical data . A voltage warning can also occur if the motor frequency is reduced too quickly due to ramp down time being too short. WARNING/ALARM 2: Live zero fault The voltage or current signal on terminal 53 or 60 is below 50% of the preset value in parameter 309 or 315 Terminal, min. scaling . WARNING 6: Voltage warning low If the intermediate circuit voltage (UDC) is lower than Voltage warning low the frequency converter will give a warning and the motor will continue to run un- changed.
A voltage warning can occur when the con- nected mains voltage is too low. Check whether the supply voltage is suitable for the frequency converter, see Technical data . When the frequency converter is switched off a brief warning 6 (and warning 8) appears. WARNING/ALARM 4: Mains phase fault No phase on mains supply side. Check the supply voltage to the frequency converter. This fault is only active in 3-phase mains supply. The alarm can also occur when the load is pulsing. In this instance the pulses must be dampened, e.g. using an inertia disc. WARNING 5:
Voltage warning high If the intermediate circuit voltage (UDC) is higher than Voltage warning high the frequency converter will give a warning and the motor will continue to run un- changed. If the UDC remains above the voltage warn- ing limit, the inverter will trip after a set time. The time depends on the device, and is set at 5 - 10 sec. Note: The frequency converter will trip with an alarm 7 (over- WARNING/ALARM 7: Overvoltage If the intermediate voltage (UDC) goes over the inver- ter's Overvoltage limit the inverter will be switched off until the UDC has once more fallen below the over- voltage limit.
If the UDC remains above the overvoltag limit the inverter will trip after a set time. The time de- pends on the device, and is set at 5 - 10 sec. An 72 MG.29.A3.02 - VLT ® is a registered Danfoss trademark No.
Description Warning Alarm Trip locked 2 Live zero error (LIVE ZERO ERROR) X X X 4 Mains phase loss (MAINS PHASE LOSS) X X X 5 Voltage warning high (DC LINK VOLTAGE HIGH) X 6 Voltage warning low (DC LINK VOLTAGE LOW) X 7 Overvoltage (DC LINK OVERVOLT) X X X 8 Undervoltage (DC LINK UNDERVOLT) X X X 9 Inverter overload (INVERTER TIME) X X 10 Motor overloaded ( MOTOR, TIME) X X 11 Motor thermistor (MOTOR THERMISTOR) X X 12 Current limit (CURRENT LIMIT) X X 13 Overcurrent (OVERCURRENT) X X X 14 Earth fault (EARTH FAULT) X X 15 Switch mode fault (SWITCH MODE FAULT) X X 16 Short-circuit (CURR.
SHORT CIRCUIT) X X 17 Serial communication timeout (STD BUS TIMEOUT) X X 18 HPFB bus timeout (HPFB TIMEOUT) X X 33 Out of frequency range (OUT FREQ RNG/ROT LIM) X 34 HPFB communication fault (PROFIBUS OPT. FAULT) X X 35 Inrush fault (INRUSH FAULT) X X 36 Overtemperature (OVERTEMPERATURE) X X 37-45 Internal fault (INTERNAL FAULT) X X 50 AMT not possible X 51 AMT fault re. nameplate data (AMT TYPE.DATA FAULT) X 54 AMT wrong motor (AMT WRONG MOTOR) X 55 AMT timeout (AMT TIMEOUT) X 56 AMT warning during AMT (AMT WARN. DURING AMT) X 99 Locked (LOCKED) X LED indication Warning yellow Alarm red Trip locked yellow and red