Danfoss VLT HVAC Basic Drive Programming Manual

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

Contents

Danfoss VLT HVAC Basic Drive Programming Manual Manual pdf 59 page image

3.10 Main Menu - Special Functions - Group143.10.1 14-0* Inverter Switching14-01 Switching FrequencyOption: Function:Select the inverter switching frequency. Changingthe switching frequency can help to reduceacoustic noise from the motor.NOTEThe output frequency value of the frequencyconverter must never exceed 1/10 of theswitching frequency. When the motor isrunning, adjust the switching frequency in14-01 Switching Frequency until the motor is asnoiseless as possible.NOTENot all choices are available in all power sizes.[0] Ran3 3kHz true random PWM (White noise modulation)[1] Ran5 5kHz true random PWM (white noise modulation)[2] 2.0 kHz[3] 3.0 kHz[4] 4.0 kHz[5] 5.0 kHz[6] 6.0 kHz[7] 8.0 kHz[8] 10.0 kHz[9] 12.0kHz[10] 16.0kHz14-03 OvermodulationOption: Function:[0] Off Selects no overmodulation of the output voltage inorder to avoid torque ripple on the motor shaft.[1] * On The over-modulation function generates an extravoltage of up-to 8% of Umax output voltage withoutover-modulation, which results in an extra torque of10-12% in the middle of the over-syncronous range(from 0% at nominal speed rising to approximately 12%at double nominal speed).14-08 Damping Gain FactorRange: Function:96.0 %* [0.0 - 100.0 %]3.10.2 14-1* Mains On/OffParameters for configuring mains failure monitoring andhandling.14-12 Function at Mains ImbalanceOption: Function:Operation under severe main imbalance conditionsreduces the lifetime of the motor. Conditions areconsidered severe if the motor is operated contin-uously near nominal load (e.g. a pump or fanrunning near full speed).When a severe mains imbalance is detected:[0] * Trip Select Trip [0] to trip the frequency converter.[1] Warning Select Warning [1] to issue a warning.[2] Disabled Select Disabled [2] for no action.CAUTIONMay cause reduced life time.3.10.3 14-2* Trip Reset14-20 Reset ModeOption: Function:Select the reset function after tripping.Once reset, the frequency convertercan be restarted.[0] * Manual reset Select Manual reset [0], to perform areset via [RESET] or via the digitalinputs.[1] Automatic reset x 1 Select Automatic reset x 1…x20 [1]-[12]to perform between one and twentyautomatic resets after tripping.[2] Automatic reset x 2[3] Automatic reset x 3[4] Automatic reset x 4[5] Automatic reset x 5[6] Automatic reset x 6[7] Automatic reset x 7[8] Automatic reset x 8[9] Automatic reset x 9[10] Automatic reset x 10[11] Automatic reset x 15[12] Automatic reset x 20[13] Infinite auto reset Select Infinite Automatic Reset [13] forcontinuous resetting after tripping.Parameters VLT HVAC Basic Drive Programming Guide58 MG.18.B1.02 - VLT® is a registered Danfoss trademark33