Daikin BRC1E73 Installation Manual

The Daikin BRC1E73 is a wired remote controller designed for use with compatible Daikin air conditioning systems. It provides centralized control of air conditioning functions, including temperature setting, mode selection, fan speed adjustment, timer settings, and system monitoring. 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 the System 7. Operation 8. Advanced Functions 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD display, control buttons, communication terminal block, mounting plate.

Feature	Description
LCD Display	Shows temperature, mode, fan speed, timer, and system status
Control Buttons	For mode selection, temperature adjustment, fan speed, and timer settings
Communication Terminal	For wired connection to the indoor unit(s)
Mounting Plate	For secure wall mounting
Temperature Sensor	Built-in sensor for ambient temperature measurement
Backlight	Illuminates display for visibility in low light
Mode Selection	Auto, Cool, Dry, Heat, Fan Only
Fan Speed Control	Auto, Low, Medium, High
Timer Functions	On/Off timer and weekly timer programming
Filter Sign	Indicates when air filter cleaning is required

Installation

Unpack and inspect contents. Ensure compatibility with your Daikin system.

Select Location: Choose an interior wall away from direct sunlight, heat sources, and moisture.
Mount Plate: Use the mounting plate as a template to mark and drill holes. Secure plate to wall.
Connect Wires: Turn off power to the indoor unit. Connect communication wires from the controller to the terminal block on the indoor unit as per wiring diagram.
Attach Controller: Align the controller with the mounting plate and snap into place.
Restore Power: Turn power back on to the indoor unit.

WARNING! Installation must be performed by a qualified technician. Ensure power is OFF during wiring to prevent electric shock.

First-Time Setup

Power on the system; the controller will initialize.

System Check: Ensure the controller displays the indoor unit model and communication is established.
Set Clock: Access the clock setting menu to set the current time and date.
Configure Options: Set temperature units (°C/°F), beeper sound, backlight duration, and other user preferences.
Test Functions: Test each operating mode (Cool, Heat, etc.) to ensure proper response from the indoor unit.

CAUTION! Do not force the controller onto the mounting plate. Ensure all wiring connections are secure and correct.

Specifications

Model: BRC1E73
Power Supply: Powered via communication line from indoor unit (DC 12V).
Display: LCD with backlight.
Control Range: Temperature setting range: 16°C ~ 30°C (60°F ~ 86°F).
Communication: Wired, 2-wire system.
Operating Environment: 0°C ~ 50°C (32°F ~ 122°F), ≤85% RH.
Dimensions: Approximately 86mm (W) x 86mm (H) x 15mm (D).
Weight: Approximately 100g.
Compatible Systems: Refer to Daikin compatibility list for specific indoor unit models.

Controls and Settings

Access functions via front panel buttons. Main Screen: Displays set temperature, room temperature, mode, fan speed, and timer status.

Buttons: ON/OFF, MODE, FAN SPEED, TEMP ▲/▼, TIMER, CLOCK/SET, FILTER RESET.

Basic Settings: Use MODE to select operation mode. Use TEMP buttons to adjust set temperature. Use FAN button to cycle through fan speeds. Advanced Settings: Press and hold CLOCK/SET to enter setting menu for clock, beeper, backlight, temperature calibration, and system configuration.

Connecting to the System

Wired connection to indoor unit communication terminals (TB7).

Turn OFF power to the indoor unit at the circuit breaker.
Remove the front cover of the indoor unit to access the terminal block.
Connect the two communication wires from the BRC1E73 to terminals TB7 (1 and 2) on the indoor unit. Observe polarity if specified.
Secure wires and replace the indoor unit cover.
Route the communication cable through the wall to the controller location, avoiding interference with power lines.

Tip: Use shielded cable for communication and ensure maximum cable length does not exceed specifications (typically 500m).

Operation

Controls air conditioning system functions.

Power: Press ON/OFF to start or stop the system.
Mode Selection: Press MODE repeatedly to cycle through Auto, Cool, Dry, Heat, Fan.
Temperature: Press TEMP ▲ or ▼ to adjust the desired room temperature.
Fan Speed: Press FAN to cycle through Auto, Low, Medium, High speeds.
Timer: Press TIMER to set automatic ON or OFF time. Use ▲/▼ to adjust hours and minutes.
Filter Reset: Press and hold FILTER RESET for 3 seconds to reset the filter cleaning reminder after maintenance.

WARNING! Do not operate the system in Heating mode if outdoor temperature is very low without checking system limitations.

Advanced Functions

Weekly Timer: Program different ON/OFF times and temperatures for each day of the week. Temperature Limit: Set maximum/minimum allowable temperature settings (requires installer settings). Fault Display: Error codes appear on display to indicate system malfunctions (e.g., U0, E5). Refer to service manual for code meanings.

Care & Maintenance

Turn off power before cleaning. Use a soft, dry cloth to wipe the display and casing. Do not use abrasive cleaners, solvents, or water.

CAUTION! Do not disassemble the controller. Internal components contain no user-serviceable parts.

Regulatory Information

This device complies with relevant CE directives and RoHS requirements. The Daikin logo and BRC1E73 are trademarks of Daikin Industries, Ltd. For technical support, installation queries, or to download the latest manual, visit the official Daikin website or contact your local Daikin distributor.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display/power	Power loss / Wiring	Check indoor unit power. Verify communication wire connections at TB7.
Display shows "---" for temp	Sensor fault / Communication	Check wiring. Power cycle the system. If persistent, contact service.
Controller does not respond	Wrong mode / System lock	Ensure indoor unit is not in TEST mode. Check for system error codes on indoor unit.
Buttons not working	Child lock / Key lock	Press and hold specific buttons (e.g., TEMP ▲ and ▼) for 5 sec to unlock. Refer to manual.
Incorrect temperature reading	Location / Calibration	Relocate controller away from heat sources. Enter setting menu to calibrate temperature sensor offset.
Error code displayed	System malfunction	Note the error code (e.g., E0, U4). Turn system OFF and ON. If code remains, contact qualified technician.

Reset: To reset to default settings, press and hold CLOCK/SET and MODE simultaneously for 10 seconds (may require installer mode).

Service: Contact authorized Daikin service center. Do not attempt to repair yourself.