Daikin Thermostat BRC1E73 Manual

The Daikin BRC1E73 is a wired remote controller (thermostat) designed for use with compatible Daikin air conditioning systems. It features a clear LCD display, intuitive button controls, multiple operation modes (Cool, Heat, Fan, Dry, Auto), temperature setting, fan speed control, timer functions, and system status indicators. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to AC System 7. Operation Modes 8. Timer Functions 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD display, Control buttons, Wired connection terminal block, Mounting plate, Battery compartment (for backup).

FeatureDescription
LCD DisplayShows set temperature, mode, fan speed, timer, and system status
Operation ModesCool, Heat, Fan, Dry, Auto
Fan Speed ControlAuto, Low, Medium, High, Quiet (if supported)
Temperature SettingAdjustable in 1°C/1°F increments (range typically 16°C-30°C / 61°F-86°F)
Timer FunctionsOn/Off timer, Weekly timer (programmable)
Wired ConnectionTerminal block for connecting to indoor unit via communication cable
Power SourcePowered from indoor unit; CR2032 backup battery for clock/timer memory
Filter SignIndicator to remind user to clean the air filter
Child LockPrevents unintended operation
Self-DiagnosisDisplays error codes for system faults

Installation

Unpack and inspect contents. Ensure compatibility with your Daikin indoor unit.

  1. Turn off power to the indoor unit at the circuit breaker.
  2. Remove the front cover of the thermostat by gently pulling from the bottom.
  3. Mount the base plate to the wall using provided screws (ensure level).
  4. Connect communication wires from the indoor unit to the terminal block on the base plate as per wiring diagram (typically 2-wire connection).
  5. Snap the thermostat body onto the base plate.
  6. Insert backup battery (CR2032) into compartment.
  7. Restore power to the indoor unit.

WARNING! Installation must be performed by a qualified technician. Incorrect wiring can damage the unit or cause safety hazards. Ensure power is OFF during installation.

First-Time Setup

After installation and power restoration, the thermostat will initialize.

  1. Set Clock: Press CLOCK button, use ▲/▼ to set time, press CLOCK again to confirm.
  2. Select Temperature Unit: In installer settings (accessible by holding buttons), choose °C or °F.
  3. Test Operation: Select a mode (e.g., Cool), set a temperature, and verify the indoor unit responds.
  4. Configure Weekly Timer (Optional): Use TIMER button to program on/off schedules for different days.

CAUTION! Do not expose the thermostat to direct sunlight, heat sources, or excessive moisture, as this may affect temperature sensing accuracy.

Specifications

Controls and Settings

Front Panel Buttons: ON/OFF, MODE, FAN SPEED, TEMP ▲/▼, TIMER, CLOCK, FILTER RESET, (possibly SWING, LOCK).

Basic Operation: Press ON/OFF to start/stop. Press MODE to cycle through Cool, Heat, Dry, Fan, Auto. Use TEMP ▲/▼ to set desired temperature. Press FAN SPEED to cycle through available fan speeds.

Advanced Settings (Installer Settings): Accessed by specific button combinations (e.g., hold MODE and FAN for 5 seconds). Includes temperature unit, temperature correction, function settings (e.g., beep on/off). Refer to installer manual for details.

Filter Reset: Press and hold FILTER button for 3 seconds to reset the filter cleaning reminder after maintenance.

Child Lock: Press and hold LOCK (or specific combination) for 3 seconds to enable/disable, preventing button presses.

Connecting to AC System

The BRC1E73 communicates with a compatible Daikin indoor unit via a 2-wire cable.

  1. Ensure indoor unit power is OFF.
  2. Locate the remote controller terminal block on the indoor unit's PCB (labeled CN41/CNRC or similar).
  3. Run a 2-core shielded communication cable (recommended by Daikin) from the indoor unit terminal to the thermostat location.
  4. Connect wires to terminals 1 and 2 on both the indoor unit and the thermostat base plate. Polarity may be important; follow wiring diagram exactly.
  5. Secure connections and restore power.

Tip: Use the correct gauge and type of wire. Avoid running communication cable parallel to power lines to prevent interference.

Operation Modes

Select mode by pressing the MODE button.

  1. Cool Mode: For cooling. Set desired temperature. Fan runs to cool room to set point.
  2. Heat Mode: For heating (requires heat pump system). Set desired temperature.
  3. Dry Mode: For dehumidification. Operates at low fan speed to remove moisture with minimal cooling.
  4. Fan Mode: Only the indoor unit fan operates. No cooling/heating. Fan speed adjustable.
  5. Auto Mode: Thermostat automatically selects Cool or Heat based on room temperature versus set point.

WARNING! In Heat mode, allow time for the system to start (defrost cycle may delay heating). Do not set heating temperature too high for efficiency.

Timer Functions

Use the TIMER button to access timer settings.

  1. On Timer: Set the time you want the system to turn ON.
  2. Off Timer: Set the time you want the system to turn OFF.
  3. Weekly Timer (Program Timer): Allows setting different ON/OFF schedules for each day of the week.
    • Press TIMER multiple times to enter program mode.
    • Select day (MON, TUE...), then set ON time, OFF time, mode, temperature, and fan speed for that period.
    • Repeat for other time periods and days.
    • Press TIMER to save and activate.

Note: The clock must be set correctly for timers to work. Backup battery maintains clock during power outages.

Care & Cleaning

Turn off power before cleaning. Use a soft, dry cloth to wipe the display and casing. For stubborn marks, dampen cloth slightly with water. Do not use abrasive cleaners, solvents, or sprays.

CAUTION! Never allow water or liquid to enter the unit through openings. Do not use compressed air to clean.

Regulatory Information

This device complies with relevant CE, RoHS, and other applicable directives. The BRC1E73 is a component of a Daikin air conditioning system and should be disposed of according to local electronic waste (WEEE) regulations. For technical support or to locate a certified Daikin dealer, visit www.daikin.com or contact your local Daikin office.

Troubleshooting

SymptomPossible CauseCorrective Action
Display is blankNo power from indoor unit; dead backup batteryCheck circuit breaker and indoor unit power. Check/replace CR2032 battery. Verify wiring connections.
"--" shown for temperatureRoom temperature sensor faultCheck sensor connection at indoor unit. May require technician service.
Error code displayed (e.g., A1, E5)System fault detectedRefer to indoor unit service manual for error code meaning. Contact qualified technician.
Buttons do not respondChild lock enabled; system in safety delayDisable child lock. Wait a few minutes (compressor restart protection).
Indoor unit does not startWrong mode selected; set temp close to room temp; timer activeSelect correct mode (Cool/Heat). Adjust set temperature. Check/cancel timer settings.
Filter indicator litFilter cleaning reminder activeClean the indoor unit air filter. Press and hold FILTER button for 3 seconds to reset.
Timer not workingIncorrect clock time; timer not activatedSet the correct clock. Ensure timer is set to "ON" in timer menu.

Reset: To reset all user settings (not installer settings), you may remove the backup battery for 1 minute while main power is on, then reinsert. This will reset clock and timers.

Service: For repairs, contact an authorized Daikin service provider. Do not attempt to disassemble the thermostat.

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