Daikin MicroTech MT2300 Operation Manual page 2

TABLE OF CONTENTS
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hazard Identification . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Connections and Terminals . . . . . . . . . . . . . . . . . . . . 4
MT2300 Unit Controller & MT2310 I/O Board
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unit Controller and Control Modules
I/O Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Replacing Unit Controller . . . . . . . . . . . . . . . . . . . . . . 6
Configuration DIP Switches . . . . . . . . . . . . . . . . . . . . 6
Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Safety Inputs (HPS, LPS, SLTS, COS) . . . . . . . . . . . . 8
Control Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fan Speed Selection . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sequence Of Operation . . . . . . . . . . . . . . . . . . . . . . 11
Electric Heat Controls . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Remote Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Heating Source Selection . . . . . . . . . . . . . . . . . . . . . 15
Hydronic Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Two Compressor Option . . . . . . . . . . . . . . . . . . . . . 15
Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Waterside Economizer . . . . . . . . . . . . . . . . . . . . . . . 17
Fault Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Brownout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
High / Low Pressure Faults (HP/LP) . . . . . . . . . . . . . 18
Low Suction Temperature Fault Heating . . . . . . . . . . 18
Low Suction Temperature Fault Cooling /
Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
©2024 Daikin Applied, Minneapolis, MN. All rights reserved throughout the world.This document contains the most current product information as of this
printing. Daikin Applied Americas Inc. has the right to change the information, design, and construction of the product represented within the document
without prior notice. For the most up-to-date product information, please go to www.DaikinApplied.com.
™® MicroTech, SiteLine, SmartSource, and Daikin Applied are trademarks or registered trademarks of Daikin Applied Americas Inc. The following
are trademarks or registered trademarks of their respective companies: BACnet from American Society of Heating, Refrigerating and Air-Conditioning
Engineers, Inc.; Modbus from Schneider Electric; and Windows from Microsoft Corporation.
DAIKIN APPLIED
Condensate Overflow . . . . . . . . . . . . . . . . . . . . . . . . 19
Fan Operation During Most Modes,
Faults and Shutdowns . . . . . . . . . . . . . . . . . . . . . . . . 19
Faults and Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MT2300 Unit Controller LED Faults . . . . . . . . . . . . . 22
A2L Detection and Mitigation . . . . . . . . . . . . . . . . . . 25
A2L Leak Detection System . . . . . . . . . . . . . . . . . . . 25
A2L Leak Mitigation . . . . . . . . . . . . . . . . . . . . . . . . . . 25
A2L Leak Detection Sensor and
Board Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
A2L Leak Detection Sensor and
Board Troubleshooting and Diagnostics . . . . . . . . . . 25
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MICROTECH 2300 UNIT CONTROLLER