McQuay MicroTech III Guia de Resolução de Problemas

Operation & Maintenance DataMicroTech® III Unit Controller for Water Source Heat Pump Units Group: WSHP Part Number:

Page 10 of 28 / OM 931-3Low Pressure ResetThe low pressure switch fault is subject to intelligent reset. If the pressure recovers, it resets three tim

OM 931-3 / Page 11 of 28Tenant OverrideNote: It is recommended that the "Occupied Operation" and "Unoccupied Operation – Stand Alone T

Page 12 of 28 / OM 931-3Fan Operation during most Modes, Faults and ShutdownsThe MicroTech III unit controller allows fan operation during most modes,

OM 931-3 / Page 13 of 28Figure 6: MicroTech III Unit Controller LED Status and Faults Troubleshooting ReferenceFlash Yellow LEDRead OutputsCheck Time

Page 14 of 28 / OM 931-3Troubleshooting the Water Source Heat Pump UnitFigure 7: Troubleshooting Guide - Unit OperationUnitLow voltage, check power s

OM 931-3 / Page 15 of 28Microtech® III Unit Controller Interface to External Equipment The MicroTech III unit controller’s thermostat input terminal

Page 16 of 28 / OM 931-3Initial Power upFigure 8: I/O Expansion Board Configuration Jumper TerminalsTable 6: I/O Expansion Board Configuration Jumpe

OM 931-3 / Page 17 of 28Three-Speed Fan OperationsTable 7: Three-Speed Fan Continuous Fan Compressor On Electric Heat Space Temp Satised Low Speed

Page 18 of 28 / OM 931-3Second Circuit FaultsWith the addition of the second circuit the fault recovery and reset table has new faults for the second

OM 931-3 / Page 19 of 28Appendix B MicroTech III Unit Controller with LonWorks® Communication ModuleFor installation and operation information on LonW

Page 20 of 28 / OM 931-3MicroTech III Controller with BACnet® Communication ModuleFor installation and operation information on MicroTech III unit con

OM 931-3 / Page 21 of 28Appendix C – Typical Wiring DiagramsMicroTech III Unit Controller (Standalone) – 208/230/460/575/60Hz/3-Phase Table B 208V

Page 22 of 28 / OM 931-3MicroTech III Unit Controller with Optional ECM Motor, Desuperheater and I/O Expansion Module – 208/230/265/277/60 Hz/1-Phase

OM 931-3 / Page 23 of 28MicroTech III Unit Controller with Optional ECM Motor, Desuperheater, Electric Heat Coil and I/O Expansion Module – 208/230/46

Page 24 of 28 / OM 931-3MicroTech III Unit Controller with Optional ECM Motor, Desuperheater, and I/O Expansion Module 208/230/460/60/3-Phase*Drawing

OM 931-3 / Page 25 of 28MicroTech III Unit Controller with PSC Motor, Desuperheater and I/O Expansion Module for Hot Gas Reheat Control (Unit Sizes 01

Page 26 of 28 / OM 931-3Controller ComparisonNote: The Mark IV, MicroTech 2000, Alerton and MicroTech III boards are NOT interchangeable.Table 12: Con

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©2012 McQuay International • www.daikinmcquay.com • 800.432.1342 OM 931-3 Page 28 of 28 (5/12)Daikin McQuay Training and DevelopmentNow

OM 931-3 / Page 3 of 28IntroductionThis installation and operation manual covers the Micro-Tech® III unit controller for Daikin McQuay Water Source He

Page 4 of 28 / OM 931-3Table 1: MicroTech III Unit Controller Terminals & Descriptions H1 - 1 24 24 VAC Power Input H1 - 2 C 24 VAC Common

OM 931-3 / Page 5 of 28Figure 1: MicroTech III Unit Controller Terminal Locations

Page 6 of 28 / OM 931-3Initial Power-UpPre start check list:A random start delay time between 180 and 240 seconds is generated at power up.Figure 2:

OM 931-3 / Page 7 of 28General Use and InformationThe MicroTech III unit controller is provided with two drive terminals, R (24VAC), and C (0VAC) that

Page 8 of 28 / OM 931-3Control Outputs {A and IV/PR (H8)}The control outputs are Alarm Fault (A) and Isolation Valve / Pump Request {IV/PR (H8)}. The

OM 931-3 / Page 9 of 28Control Inputs (HP, LP, SLTS, COF, U, E, O)The control inputs are High Pressure (HP), Low Pressure (LP), Suction Line Temperatu