Introduction
This manual provides detailed information on the MicroTech® II control system utilized in the Daikin Applied Unit Ventilator product line. It covers the MicroTech II components, input/output configurations, field wiring requirements, and essential service procedures.
For specific installation and general information regarding the MicroTech II Unit Ventilator Controller, please refer to IM 747. For installation, commissioning, and general details pertinent to individual unit ventilator models, consult the relevant manual (Table 1), the accompanying software operating instruction manual (Table 4), and any applicable accessory manuals (Table 3).
Installation and maintenance instructions for plug-in communication cards can be found in the respective protocol-specific manuals (Table 2). For a comprehensive description of supported network variables for each protocol, refer to Protocol Data Packet bulletin ED 15065.
The latest versions of these manuals are accessible for download on the Daikin Applied website at www.DaikinApplied.com or through your local Daikin Representative.
Key Features and Operation
The MicroTech II Unit Vent Controller (UVC) is a self-contained device designed for complete, stand-alone operation. Users can access and modify controller information via the keypad/display (local user interface). This manual details how to use the keypad/display for monitoring operating conditions, system alarms, and control parameters, as well as modifying set points.
The keypad/display features a 2-digit, 7-segment display that typically shows the effective heating or cooling temperature set point. It also facilitates viewing and adjusting UVC parameters. Security levels are implemented to restrict access, with four levels available, starting from level 0 (default) which grants full access.
State Programming
The MicroTech II UVC employs "state" machine programming to define and manage unit ventilator operation. Each "State" represents a specific mode, incorporating decision logic and operational sequences for functions like heating, cooling, and fan operation. This approach helps prevent common control issues such as simultaneous heating and cooling or rapid cycling.
The UVC utilizes states and super states to define normal unit modes (e.g., Off, Night Purge, Fan Only, Emergency Heat, Auto, Cool, Heat, Active Dehum) and special purpose modes (e.g., Purge, Pressurize, Shutdown). Transition logic, presented in state diagrams, guides the UVC in determining the active state based on monitored conditions and inputs.
