Daikin

Daikin BRC1D52

Answers and step-by-step fixes from the official Daikin manual.

What does the display show?

• FILTER: Time to clean the filter. The filter of the ventilation unit needs cleaning.
• 64: Indoor air sensor problem. The indoor air thermistor has failed.
• 65: Outdoor air sensor problem. The outdoor air thermistor has failed.
• 6A: Damper problem. There is a fault with the air damper.
• 6A: Damper and sensor problem. There is a fault with the damper and a thermistor.
• A6: Fan motor locked. The fan motor rotor is locked and cannot turn.
• C1: Fan communication problem. The fan is not communicating correctly.
• U5: Remote controller link problem. There is a transmission error between the unit and the remote controller.
• U5: Remote controller board problem. There is a circuit board fault or a wrong setting on the remote controller.
• U8: Main and sub controller link problem. There is a transmission error between the main and sub remote controllers.
• UA: Wrong controller type. The wrong type of remote controller has been installed for this unit.
• UE: Centralized controller link problem. There is a transmission error between the unit and the centralized controller.

Common problems

The unit will not turn on

1. Is there a power failure? Wait for power to be restored, then start the unit again.
2. Has a fuse blown or a breaker tripped? Change the fuse or reset the breaker.
3. Does the remote control show the operation control method indication? This is normal. Operate the unit from the air conditioner remote control or the centralized controller instead.
4. Does the remote control show operation standby? The unit is waiting out a precooling or preheating period and will start once that is finished.

Airflow is too weak or too strong

1. Is the airflow weak with a high sound? Check whether the air filter and heat exchange element are clogged, then clean them.
2. Is the airflow and sound too strong? Check that the air filter and heat exchange element are correctly installed.

The FILTER indication stays on

1. Does the display show FILTER? Clean the air filter of the unit.
2. Has it been about two years since the last cleaning? Clean the filter and heat exchange element at least every two years for general office use, more often if needed.

The remote control shows a malfunction code

1. Is the code shown in white letters on a black background? The unit can keep running, but have it inspected and repaired as soon as possible.
2. Look up the code against the malfunction list. Match the code to the list of malfunction codes, then contact the dealer where the unit was purchased.

Step-by-step guides

Clean the filter and heat exchange element

1. Turn off the operation switch and disconnect the power.
2. Go into the ceiling through the inspection hole and take off the maintenance cover.
3. Take out the heat exchange elements from the unit body.
4. Clean the air filter by patting it or vacuuming it.
5. If you washed the filter, let it dry fully in the shade before refitting.
6. Vacuum dust off the surface of the heat exchange element with a brush nozzle.
7. Install the air filter securely in place.
8. Put the heat exchange element back on the rail and insert it securely.
9. Install the maintenance cover securely in place.