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How to troubleshoot insufficient cooling or heating in Daikin Controller?
If your Daikin Controller is providing insufficient cooling or heating, start by verifying that the thermostat is properly located. Also, ensure proper airflow by checking for obstructions or a dirty filter.
What to do if Daikin MicroTech III Controller compressor attempts to start but does not?
If your Daikin Controller's compressor attempts to start but fails, inspect the compressor wiring for defects or loose connections. Additionally, use an ohmmeter to check the compressor's internal windings for defects.
What to do if Daikin Controller unit is cycling on the safety?
If your Daikin Controller unit is cycling on the safety, examine the compressor overload to ensure it is closed. Also, check the reversing valve to see if it's stuck or operating incorrectly.
General| Brand | Daikin |
|---|---|
| Model | MicroTech III |
| Category | Controller |
| Language | English |
Provides initial steps for installing and starting up the MicroTech III unit controller.
Explains the components and navigation of the keypad/display interface for unit control.
Details user access, password management, menu navigation, and parameter editing functions.
Features for overriding timers, initiating rapid start, and manual component control for testing.
Access to basic unit status, setpoints, and information via primary menus.
Menus for configuring unit type, cooling, heating, fan settings, and other operational parameters.
Functions for manual control, service diagnostics, network communication, and trending.
Viewing active alarms, logs, and unit specific information.
Detailed descriptions of items within the Quick Menu for unit status and control setpoints.
Summary of basic unit status, operating state, and capacity levels.
Details on occupied, unoccupied, and tenant override modes and their sources.
Displays status information from various unit temperature sensors.
Status of airflow, waterflow, pump, and supply/return/exhaust fans.
Settings for controlling supply air fan speed based on duct pressure, CO2, CFM, or BSP.
Parameters for controlling RF/EF fan speed, building static pressure, and operational modes.
Settings for cooling operation, including occupied, unoccupied, and DAT setpoints.
Parameters for economizer control, including position, status, and setpoints.
Settings for minimum outdoor air damper position and ventilation limits.
Summary of control parameters for units with heating, including setpoints and deadbands.
Settings for dehumidification control, including method, setpoints, and sensor inputs.
Setting the current time and date for unit operation.
Setting start and stop times for daily and holiday operating periods.
Scheduling single events and optimizing start times for unit operation.
Configuration for daylight savings time adjustments.
Configuration of unit type, sensors, units, and special startup sequences.
Adjustable parameters for internal control timers affecting unit operation delays.
Settings for supply fan speed control using DSP, CO2, CFM, or BSP methods.
Parameters for controlling RF/EF fan speed, building static pressure, and operational modes.
Settings for automatic heat/cool changeover based on temperature and control type.
Parameters for cooling operation, including stage timing, deadbands, and lockout setpoints.
Settings for controlling variable speed compressors, including status, circuit, and setup parameters.
Parameters for economizer operation, including changeover temperature, damper limits, and fault detection.
Settings for minimum outdoor air damper position control and reset schedules based on various inputs.
Parameters for heating operation, including stage timing, deadbands, lockout setpoints, and warm-up sequences.
Settings for dehumidification control, including method, setpoints, and sensor inputs.
Parameters for controlling the enthalpy wheel and exhaust fan for energy recovery.
Parameters for maintaining head pressure control via water regulating valve modulation.
Settings for evaporative condenser control, including fan speed and sump temperature management.
Sets limits for discharge and return air temperature sensors for alarm detection.
Configures digital alarm output actions based on alarm groups and priority.
Configures delay times for various alarm conditions to prevent nuisance trips.
Allows manual operation of unit components for service and troubleshooting purposes.
Save/restore parameters, view active alarms, and access historical event logs.
Records and displays the last fifty unit events, including compressor operations.
Displays historical alarm events, including detection and return to normal times.
Provides diagnostic information on the status of unit analog inputs.
Displays status information for universal inputs and outputs, including resistance, mA, or voltage readings.
Shows the current status of the controller's digital inputs.
Shows the current status of the controller's digital outputs.
Displays status information for controller network inputs, such as OAT and occupancy state.
Provides diagnostic information on Modbus communications with various devices.
Displays status of an interface via a D3 gateway, referencing IM 1133.
Allows calibration of various temperature sensor inputs by applying a bias offset.
Summary of operating hours for fans, compressors, heating, and economizer.
Configuration for network communication protocols like LON and BACnet.
Central location for setting up items controlled via a network BMS system.
Configuring the control application by setting variables like unit type, cooling, and heat types.
Setup and management of onboard trending, including fixed data points.
Options for selecting points from primary and secondary lists for trending.
Selecting points by ID, type, and member numbers for trending.
Selecting points by ID, type, and member numbers for trending.
List of primary points available for selection in the trending menu.
List of secondary points available for selection in the trending menu.
Displays unit identification, serial number, and software versions.
Information about abnormal conditions affecting unit operation, categorized by Faults, Problems, and Warnings.
Procedures for clearing active alarms via keypad or network interface.
Alarms related to economizer operation issues like over/under economizing or excess OA.
Alarms for stuck outdoor air dampers and dirty filters.
Warnings related to airflow switch, conductivity, and return/exhaust fan communication.
Alarms related to compressor operation and sensor failures (DRT2, PTD2, PTD1).
Alarms indicating high/low discharge pressure and superheat issues affecting compressor control.
Problems related to compressor oil, high/low pressure, water flow, and regulating valves.
Alarms related to low pressure conditions on compressor circuits 1 through 6.
Alarms for high pressure conditions on compressor circuits, disabling cooling.
Alarms for issues with EFT/LCT, RAT, Space, OAT, EWT, and MAT sensors.
Problem when sump water level input remains in the open position.
Fault occurs when freezestat contacts open due to low coil temperature with fans running.
Faults related to airflow detection, and low/high discharge air temperatures.
Faults for high return air temperature and duct high limit conditions.
Faults related to discharge air sensor, control temperature, emergency stop, and freeze conditions.
Explains the different operating states of the unit (OFF, Start Up, Recirculating, Fan Only, Min DAT, Heating, Economizer, Cooling).
How to determine unit status and select control modes (Auto, Heat/Cool, Cool Only, Heat Only, Fan Only, Off).
Setting unit heating/cooling based on network signals (Auto mode).
Identifying if the unit is in occupied, unoccupied, or tenant override mode.
Identifies the function responsible for placing the unit into occupied mode.
Adjustable item to set the unit for manual or automatic occupied, unoccupied, or tenant override operation.
Normal operation during unoccupied periods, including settings for dehumidification, cooling, and heating.
Internal and network optimal start schedules for enabling unoccupied operation.
Unit scheduling methods including internal, external, and network functions.
How temperature control is based on Zone, DAT, or Single Zone VAV configurations.
How the unit operates to deliver cooling or heating discharge temperature setpoints.
Graphical illustration of the heat/cool changeover sequence based on temperature.
Selecting the temperature input for heat/cool changeover decisions and setting occupied temperature setpoints.
Disables heating/cooling based on outdoor/entering water temperatures.
Features for overriding operation for tenant events and morning warm-up sequences.
Operation sequence after leaving heating states to prevent duct over-pressurization.
Process for starting and stopping dehumidification based on humidity setpoints and conditions.
Controlling mechanical cooling during dehumidification based on leaving coil temperature.
Control of the HGBP valve for modulating hot gas reheat and ensuring proper hot gas flow.
Methods for controlling reheat using analog or digital outputs to maintain setpoints.
Function to reduce cooling capacity to increase leaving coil temperature during dehumidification.
How energy recovery works by transferring heat between air streams using an enthalpy wheel.
Methods to prevent frost or condensation on the enthalpy wheel using speed control or defrost.
Strategies for preventing frost on constant and variable speed enthalpy wheels.
Timely defrost control and capacity limiting for energy recovery wheels.
How the energy recovery wheel operates in heating and cooling states under capacity limiting.
Control of variable speed wheels and exhaust fans, including operational conditions.
Control of bypass dampers based on OA damper position.
Managing minimum outdoor air damper position during various operating states and cold starts.
Special sequence to slow damper opening in cold conditions to prevent freezestat trips.
Options for resetting minimum OA damper position based on None, Network, External, or IAQ inputs.
Illustrative examples of Min OA reset schedules for IAQ VDC and EXT VDC inputs.
Overrides minimum OA damper setpoint based on temperature inputs.
Adjusting minimum OA position based on measured outdoor air from a field station.
Controlling minimum OA damper position to maintain minimum OA flow setpoint for specific units.
Operation of two-position OA actuators and ventilation limits for 0-30% OA units.
Overriding minimum OA position based on return fan speed for economizer units.
Overriding minimum OA position based on building static pressure for economizer units.
Control of 100% OA dampers using digital or analog outputs.
Unit attempts to satisfy cooling load using outdoor air before mechanical cooling.
Transitioning from economizer to cooling state when economizer cannot satisfy load.
Unit attempts to satisfy cooling load using waterside economizer before mechanical cooling.
Provides warning alarms for economizer operation faults like over/under economizing or stuck dampers.
Calibrates outdoor air damper end switch inputs to capture command positions.
Describes Slave Control and Bypass Control methods for managing bypass valves.
Control logic for water regulating valve during cooling and fan only states.
Logic for activating the sump pump based on various conditions and Dolphin system settings.
How the unit transitions into the cooling state from Fan Only or other states.
Strategies for staging compressors in cooling mode for DAT control.
Describes the four possible staging transitions for cooling capacity adjustment.
Illustration of compressor staging using the "Degree Time" method.
How compressor stages are controlled to maintain zone temperature setpoints.
Describes the Projected Control Temperature used for staging heating and cooling.
Control methods for modulating cooling using chilled water or face & bypass dampers.
Resets the cooling DAT setpoint based on various inputs like Return Air, Space, OAT, or Airflow.
Details VFD compressor operation, modulation, and staging for Maverick II units.
Unloading control based on high discharge line temperature to protect the compressor.
Protection against low or high discharge superheat conditions by adjusting compressor speed.
Manual operations for VFD compressors, including start/stop, speed modulation, and oil boost.
Controls splitter valves based on average discharge pressure temperature for head pressure management.
Emergency stop function for VFD compressors triggered by lack of run verification signal.
Head pressure control modulating condenser fan speed based on pressure and ambient conditions.
Details VFD compressor operation, modulation, and start-up sequences.
Lists available compressor drive models and their corresponding frame sizes.
Explains Daikin units with variable speed compressors for energy savings and comfort.
Information on compressor identification from the nameplate and key components.
Controls oil injection valve and solenoid for scroll set lubrication under low speed conditions.
Monitors oil level in VFD compressor sump using an optical sensor.
Details basic electrical connections and wiring for frequency converters and compressors.
Describes condenser fan control for RPS units based on OAT and compressor status.
Default condenser fan setpoints vary by unit size for different refrigerant types.
Controls two, three, or four condenser fans based on OAT and compressor status.
Explains fan staging methods for units with four condenser fans.
Default condenser fan setpoints for MPS units based on unit size and control method.
How evaporative condensing uses heat absorbed by evaporating water to cool refrigerant.
Two cooling staging configurations for evaporative condenser units, Standard and Alternate.
Tables showing dehumidification staging for two compressor and four compressor configurations.
Process of pumping down refrigerant into the condenser when a circuit is shut off.
Logic for activating the sump pump based on various conditions and Dolphin system settings.
Controls the sump drain valve to empty the sump when temperatures get too cold.
Flushes the separator of collected solids using an ON/OFF flush valve actuator.
Controls sump temperature and condenser fan operation based on sump temperature.
How the unit enters heating state from Fan Only based on control temperature and deadbands.
Strategies for morning warmup and heating control in Zone Control and DAT Control units.
How heating stages are controlled based on time, temperature, and setpoints for Zone and DAT control.
How the unit enters and modulates heating capacity based on operating state and temperature.
Control methods for steam or hot water heating using face/bypass dampers.
Modulating gas valve control to maintain discharge air temperature, considering heat exchanger limits.
Using Min DAT Limit to prevent cold discharge air during normal operation.
Sequence of operation for a 20-1 gas burner, including prepurge and ignition.
Detailed sequences of operation for 5-1 and 10-1 gas burners.
Resets the heating DAT setpoint based on various inputs like Return Air, Space, OAT, or Ext signals.
Special startup sequence for 100% OA units with gas heat for tempered air delivery.
Heating operation for return air units, modulating gas valve to maintain discharge temperature.
Sequence of operation for MPS gas heating, covering 2-stage and 4-stage control.
Basic ON/OFF control for supply, return, and exhaust fans.
Modulating supply fan speed for VAV systems to maintain duct static pressure or fixed speed.
Controlling fan speed based on duct static pressure or network signals.
PI loop control for supply fan VFD to maintain zone temperature setpoints in VAV applications.
Modulating supply fan VFD to maintain zone temperature in cooling/economizer modes.
Modulating supply fan VFD to maintain zone temperature in heating mode.
Fixed supply fan speed when unit is in FanOnly or MinDat state.
Fan control based on building static pressure, CO2 levels, or airflow (CFM).
Approaches to maintain building static pressure using RF/EF fans.
Controlling return fan speed to track supply fan and managing fan speed differentials.
Controlling fan speed via building static pressure, network signals, or single zone VAV.
Logic for turning exhaust fans ON/OFF based on OA damper position and supply fan status.
Control of propeller exhaust fans based on OA damper position.
Controlling exhaust fans based on building static pressure or speed.
Fan configuration and settings for staged exhaust fans based on OA damper position.
Diagnosing and resolving Hall Sensor errors in fan motors.
Troubleshooting issues related to electronics overheating in fan motors.
Diagnosing and resolving motor overheating problems, including load and voltage checks.
Troubleshooting power modulation overheating issues in fan motors.
Diagnosing and resolving locked motor issues and communication errors.
Diagnosing and resolving phase failure and voltage issues affecting fans.
