Danfoss VLT AQUA Drive FC 202 Programming Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

3.21 Parameters 24-** Application Functions 23.21.1 24-0* Emergency ModeCAUTIONNote that the frequency converter is only 1 component of the system. Correct function of emergency mode depends onthe correct design and selection of system components. Ventilation systems working in life safety applications must beapproved by the local emergency authorities. Non-interruption of the frequency converter due to emergency modeoperation could cause overpressure and damage the system and components, including dampers and air ducts. Thefrequency converter itself could be damaged and become a source of danger. Danfoss accepts no responsibility forerrors, malfunctions personal injury, or any damage to the frequency converter itself or components herein, pumpsystems and components herein, or other property when the frequency converter has been programmed for emergencymode. In no event shall Danfoss be liable to the end user or any other party for any direct or indirect, special, orconsequential damage or loss suffered by such party, which has occurred due to the frequency converter beingprogrammed and operated in emergency mode.BackgroundEmergency mode is for use in critical situations, where it is imperative for the motor to keep running, regardless of thefrequency converter’s normal protective functions. Some selections of the emergency mode function cause alarms and tripconditions to be disregarded, enabling the motor to run without interruption.ActivationEmergency mode is activated only via digital input terminals. See parameter group 5-1* Digital Inputs.Messages in displayWhen emergency mode is activated, the display shows a status message Emergency Mode and a warning Emergency Mode.Once the emergency mode is again deactivated, the status messages disappear and the warning is replaced by the warningEmergency M Was Active. This message can only be reset by power-cycling the frequency converter supply. If a warranty-affecting alarm (see parameter 24-09 Emergency Mode Alarm Handling) should occur while the frequency converter is activein emergency mode, the display shows the warning Emergency M Limits Exceeded.Digital and relay outputs can be configured for the status messages Emergency Mode Active and the warning Emergency MWas Active. See parameter group 5-3* Digital Outputs and parameter group 5-4* Relays.Emergency M was Active messages can also be accessed in the warning word via serial communication. (See relevantdocumentation).Access the status messages Emergency Mode via the extended status word.Message Type LCP Messages indisplay Warning word 2 Ext. status word 2Emergency Mode Status + + – + (bit 25)Emergency Mode Warning + – – –Emergency M was Active Warning + + + (bit 3) –Emergency M LimitsExceeded Warning + + – –Table 3.32 Messages in DisplayLogTo see an overview of emergency mode-related events, view the emergency mode log, parameter group 18-1* Emergencymode log, or press [Alarm Log] on the LCP.The log includes up to 10 of the latest events. Warranty-affecting alarms have a higher priority than the other 2 types ofevents.The log cannot be reset.The following events are logged:• Warranty-affecting alarms (see parameter 24-09 Emergency Mode Alarm Handling).• Emergency mode activated.• Emergency mode deactivated.All other alarms occurring while emergency mode is activated are logged as usual.Parameter Description VLT® AQUA Drive FC 202202 Danfoss A/S © 05/2018 All rights reserved. MG20OB0233