Danfoss VLT HVAC Operating Instructions Manual

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

Contents

WARNING/ALARM 36, Mains failureThis warning/alarm is only active if the supply voltage tothe frequency converter is lost and 14-10 Mains Failure isNOT set to [0] No Function. Check the fuses to thefrequency converter and mains power supply to the unit.ALARM 38, Internal faultWhen an internal fault occurs, a code number defined inTable 8.3 is displayed.TroubleshootingCycle powerCheck that the option is properly installedCheck for loose or missing wiringIt may be necessary to contact your Danfoss supplier orservice department. Note the code number for furthertroubleshooting directions.No. Text0 Serial port cannot be initialised. Contact yourDanfoss supplier or Danfoss Service Department.256-258 Power EEPROM data is defective or too old512-519 Internal fault. Contact your Danfoss supplier orDanfoss Service Department.783 Parameter value outside of min/max limits1024-1284 Internal fault. Contact your Danfoss supplier or theDanfoss Service Department.1299 Option SW in slot A is too old1300 Option SW in slot B is too old1302 Option SW in slot C1 is too old1315 Option SW in slot A is not supported (not allowed)1316 Option SW in slot B is not supported (not allowed)1318 Option SW in slot C1 is not supported (notallowed)1379-2819 Internal fault. Contact your Danfoss supplier orDanfoss Service Department.2820 LCP stack overflow2821 Serial port overflow2822 USB port overflow3072-5122 Parameter value is outside its limits5123 Option in slot A: Hardware incompatible withcontrol board hardware5124 Option in slot B: Hardware incompatible withcontrol board hardware5125 Option in slot C0: Hardware incompatible withcontrol board hardware5126 Option in slot C1: Hardware incompatible withcontrol board hardware5376-6231 Internal fault. Contact your Danfoss supplier orDanfoss Service Department.Table 8.3 Internal Fault CodesALARM 39, Heatsink sensorNo feedback from the heatsink temperature sensor.The signal from the IGBT thermal sensor is not available onthe power card. The problem could be on the power card,on the gate drive card, or the ribbon cable between thepower card and gate drive card.WARNING 40, Overload of digital output terminal 27Check the load connected to terminal 27 or remove short-circuit connection. Check 5-00 Digital I/O Mode and5-01 Terminal 27 Mode.WARNING 41, Overload of digital output terminal 29Check the load connected to terminal 29 or remove short-circuit connection. Check 5-00 Digital I/O Mode and5-02 Terminal 29 Mode.WARNING 42, Overload of digital output on X30/6 oroverload of digital output on X30/7For X30/6, check the load connected to X30/6 or removethe short-circuit connection. Check 5-32 Term X30/6 DigiOut (MCB 101).For X30/7, check the load connected to X30/7 or removethe short-circuit connection. Check 5-33 Term X30/7 DigiOut (MCB 101).ALARM 45, Earth fault 2Earth (ground) fault on start up.TroubleshootingCheck for proper earthing (grounding) and looseconnections.Check for proper wire size.Check motor cables for short-circuits or leakagecurrents.ALARM 46, Power card supplyThe supply on the power card is out of range.There are three power supplies generated by the switchmode power supply (SMPS) on the power card: 24 V, 5 V,+/- 18 V. When powered with 24 V DC with the MCB 107option, only the 24 V and 5 V supplies are monitored.When powered with three phase mains voltage, all threesupplies are monitored.TroubleshootingCheck for a defective power card.Check for a defective control card.Check for a defective option card.If a 24 V DC power supply is used, verify propersupply power.WARNING 47, 24V supply lowThe 24 V DC is measured on the control card. The external24 V DC backup power supply may be overloaded,otherwise contact your Danfoss supplier.WARNING 48, 1.8V supply lowThe 1.8 V DC supply used on the control card is outside ofallowable limits. The power supply is measured on thecontrol card. Check for a defective control card. If anoption card is present, check for an overvoltage condition.Warnings and Alarms VLT® HVAC Drive Operating InstructionsMG11AH02 - VLT® is a registered Danfoss trademark 598 8