Daikin MicroTech III Operation & Maintenance Manual

OM 931-6 • MicroTech III Unit Controller for WSHP 2 www.DaikinApplied.com
Introduction..................................3
MicroTech III Unit Controller ....................4
Control Boards Terminals and Connectors
Descriptions ................................4
MicroTech III Unit Controller Connections ..........5
Replacing A MicroTech III Circuit Board: ..........6
Initial Power-Up ..............................6
Pre start check list: ...........................6
General Use and Information ...................7
Occupied Operation ..........................7
Thermostat Inputs (G, Y1, Y2, W1 and W2) ........7
Control Inputs (HP, LP, SLTS, COF, U, E, O) .......7
Control Outputs {A and IV/PR (H8)} ..............8
Fan Operation ...............................8
Unoccupied Operation – Stand Alone Thermostat
Control.....................................9
Thermostat Inputs (G, Y1, Y2, W1, and W2)........9
Additional Operating Modes ....................9
Remote Shutdown Mode.......................9
High / Low Pressure Faults (HP/LP) .............10
Condensate Overow ........................11
Fan Operation during most Modes, Faults and
Shutdowns .................................12
Troubleshooting .............................13
Troubleshooting the MicroTech III Unit Controller ...13
Troubleshooting the Water Source Heat Pump Unit 14
Microtech
®
III Unit Controller Interface to External
Equipment..................................15
Appendix A .................................15
Operation and Maintenance of I/O
Expansion Module...........................15
Start-up ....................................16
Initial Power up .............................16
Operation...................................17
Electric Heat Controls ........................17
Multiple Speed Fan Control....................17
Circuit Two, Additional Operating Modes .........17
Second Circuit Faults ........................18
Appendix B .................................19
MicroTech III Unit Controller with LonWorks
®
Communication Module ......................19
MicroTech III Controller with BACnet
®
Communication
Module ...................................20
Appendix C – Typical Wiring Diagrams ..........21
MicroTech III Unit Controller (Standalone) –
208/230/460/575/60Hz/3-Phase ................21
MicroTech III Unit Controller with Optional ECM
Motor, Desuperheater and I/O Expansion Module –
208/230/265/277/60 Hz/1-Phase ...............22
MicroTech III Unit Controller with Optional ECM Motor,
Desuperheater, Electric Heat Coil and I/O Expansion
Module – 208/230/460/60 Hz/3-Phase ...........23
MicroTech III Unit Controller with Optional ECM
Motor, Desuperheater, and I/O Expansion Module
208/230/460/60/3-Phase......................24
MicroTech III Unit Controller with PSC Motor,
Desuperheater and I/O Expansion Module for
Hot Gas Reheat Control (Unit Sizes 019-070)
208/230/60/1-Phase .........................25
Controller Comparison .......................26
Controller Comparison Table...................26
Contents

Daikin MicroTech III Specifications

General

Brand	Daikin
Model	MicroTech III
Category	Controller
Language	English