Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual

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

Contents

Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual Manual pdf 9 page image

1.8 Symbols, Abbreviations, andConventionsAbbreviation DescriptionETR Electronic thermal relay.LCP Local control panel.NC Not connected.PNP Positive negative positive (transistor).TNF Nominal response temperature.Table 1.2 AbbreviationsAbbreviationReference DescriptionATEX ATEX Directive94/9/ECATmosphere EXplosiblesHFT EN IEC 61508 Hardware fault tolerance: HFT=nmeans that n+1 faults could cause aloss of the safety function.PDS/SR EN IEC61800-5-2Power drive system (safety-related).PFD EN IEC 61508 Average probability of failure ondemand, value used for low-demand operation.SFF EN IEC 61508 Safe failure fraction [%]; percentageof safe failures and dangerousdetected failures of a safety functionor a subsystem related to all failures.SIL EN IEC 61508EN IEC 62061Safety integrity level.STO EN IEC61800-5-2Safe Torque Off.SRECS EN IEC 62061 Safety-related electrical controlsystem.Table 1.3 Abbreviations Related to Functional SafetyConventionsNumbered lists indicate procedures.Bullet lists indicate other information and description ofillustrations.Italicised text indicates:• Cross-reference.• Link.• Parameter name.Introduction VLT® PTC Thermistor Card MCB 1126 Danfoss A/S © 01/2015 All rights reserved. MG33V30211