VLT ® 2900 Series WARNING/ALARM 34: HPFB communication fault Communication fault only occurs in Fieldbus versions. Regarding alarmtype, please see parameter 953 in fieldbus literature. Alarm 42, internal fault number 5: Fault in motor pa- rameter database. Alarm 43, internal fault number 6: General power card fault. ALARM 35: Inrush fault This alarm occurs when the frequency converter has been connected to the mains supply too many times within 1 minute. Alarm 44, internal fault number 7: Minimum software version of control card or BMC. Alarm 45, internal fault number 8: I/O fault (digital in- put/output, relay or analog input/output). WARNING/ALARM 36:
Overtemperature If the temperature inside the power module rises above 75 - 85 °C (depending on the device) the fre- quency converter will emit a warning, and the motor will continue to run unchanged. If the temperature con- tinues to rise, the switch frequency is reduced auto- matically. See Temperature-dependent switching frequency . If the temperature inside the power module rises above 92 - 100 °C (depending on the unit) the fre- quency converter will cut out. The temperature fault cannot be reset until the temperature has dropped to below 70 °C. The tolerance is ± 5 °C. The temperature can be caused by the following: NB!
When restarting after an alarm 38-45, the frequency converter will display an alarm 37. In parameter 615 the actual alarm code can be read. ALARM 50: AMT not possible One of the following three possibilities can occur: - The calculated R S value falls outside permit- ted limits. - The motor current in at least one of the motor phases is too low. - The motor in use is too small for AMT calcu- lations to be performed. - The ambient temperature too high. - Motor cable too long. - Too high mains voltage. ALARM 51: AMT Fault regarding nameplate data There is inconsistency between the registered motor data. Check the motor data for the relevant setup. ALARM 37-45:
Internal fault If one of these failures occurs, please contact Danfoss. ALARM 52: AMT missing motor phase The AMT function has detected a missing motor phase. Alarm 37, internal fault number 0: Communication fault between control card and BMC. Alarm 38, internal fault number 1: Flash EEPROM fault on control card. ALARM 55: AMT timeout Calculations are taking too long, possibly due to noise on the motor cables. Alarm 39, internal fault number 2: RAM fault on control card. ALARM 56: AMT warning during AMT A frequency converter warning is given while AMT is being performed. Alarm 40, internal fault number 3: Calibration constant in EEPROM. Alarm 41, internal fault number 4:
Data values in EE- PROM. WARNING 99: Locked See parameter 18. Alarm/warning limits: Without brake With brake Without brake With brake VLT 2900 1 / 3 x 200 - 240 V [VDC] 3 x 380 - 480 V [VDC] Undervoltage 215 215 410 410 Voltage warning low 230 230 440 440 Voltage warning high 385 400 765 800 Overvoltage 410 410 820 820 1 / 3 x 200 - 240 V [VDC] 3 x 380 - 480 V [VDC] The voltages stated are the intermediate circuit volt- age of the frequency converter with a tolerance of ± 5 %. The corresponding line voltage is the intermediate circuit voltage divided by 1,35. 74 MG.29.A3.02 - VLT ® is a registered Danfoss trademark