Danfoss VLT HVAC Basic Drive FC 100 Series Programming Manual

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Danfoss VLT HVAC Basic Drive FC 100 Series Programming Manual Manual pdf 91 page image

24-00 FM FunctionOption: Function:[0] Disabled Fire Mode Function is not active.[1] Enabled-RunForwardIn this mode, the motor will continue tooperate in a clockwise direction.[2] Enabled-RunReverseIn this mode, the motor will continue tooperate in a counter-clockwise direction.[3] Enabled-Coast When this mode is enabled, the output isdisabled and the motor is allowed tocoast to stop.[4] Enabled-RunFwd/RevNOTE!In the above, alarms are produced or ignored inaccordance with the selection in 24-09 FM Alarm Handling.24-05 FM Preset ReferenceRange: Function:0 %* [-100 - 100 %] Enter the required preset reference/setpoint as a percentage of the Fire ModeMax Reference set in Hz.24-09 Fire Mode Alarm HandlingOption: Function:[0] Trip+Reset,Crit AlarIf this mode is selected, the adjustablefrequency drive will continue to run, ignoringmost alarms, even if doing so it may result indamage of the adjustable frequency drive.Critical alarms are alarms which cannot besuppressed, but a restart attempt is possible(Infinity Automatic Reset).[1] Trip, CriticalAlarmsIn case of a critical alarm, the adjustablefrequency drive will trip and not auto-restart(Manual Reset).[2] Trip, AllAlarms/TestIt is possible to test the operation of FireMode, but all alarm states are activatednormally (Manual Reset).NOTE!Warranty-affecting alarms. Certain alarms can affect thelifetime of the adjustable frequency drive. If one of thesedisregarded alarms occurs while in Fire Mode, a log of theevent is stored in the Fire Mode Log.This is where the 10 latest events caused by warranty-affecting alarms, fire mode activation and fire modedeactivation are stored.NOTE!The setting in 14-20 Reset Mode is disregarded if Fire Modeis active (see parameter group 24-0*, Fire Mode).No: Description CriticalAlarmsWarrantyAffectingAlarms4 Mains ph. Loss x7 DC over volt x8 DC under volt x9 Inverter overloaded x13 Over current x14 Earth fault x16 Short circuit x29 Power card temp x33 Inrush fault x38 Internal fault x65 Ctrl. card temp x68 SafeStop xTable 3.143.16.2 24-1* Drive BypassThe adjustable frequency drive includes a feature whichcan be used to automatically activate an external electro-mechanical bypass in case of the event of a Fire ModeCoast (see 24-00 FM Function).The bypass will switch the motor to operation direct online. The external bypass is activated by means of one ofthe digital outputs or relays in the adjustable frequencydrive, when programmed in parameter group 5-3* orparameter group 5-4*.NOTE!The drive bypass cannot be deactivated if in Fire Mode. Itcan be deactivated only by either removing the Fire Modecommand signal or the power supply to the adjustablefrequency drive!When the Drive Bypass function is activated, the display onthe LCP will show the status message Drive Bypass. Thismessage has a higher priority than the Fire Mode statusmessages. When the automatic Drive Bypass function isenabled, it will cut in the external bypass according to thebelow sequence:Parameters VLT® HVAC Basic Drive Programming GuideMG18B222 - VLT® is a registered Danfoss trademark 3-633 3