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ESiEN02–01A Troubleshooting

Part 3 – Troubleshooting 3–5

Abnormal operating

noise and

vibrations

Make sure the required space for installation is provided. See chapters “General Outline: Indoor Units”

and “General Outline: Outdoor Units”.

Equipment does

not operate

(operation light

OFF)

To troubleshoot, check the following:

■ Check if the breaker has switched OFF or the fuse has blown.

■ Check if the batteries are placed in the remote control.

■ Check if the address switch is set correctly. See page 4–5.

■ Check if the timer is set correctly.

Poor cooling or

heating

To troubleshoot, check the following:

■ Check if the filters are clean.

■ Check if there is no obstruction of the air inlet or outlet of the indoor and outdoor units.

■ Check if the temperature settings are correct.

■ Check if all windows and doors are closed.

■ Check if the air flow and air direction are set correctly.

■ Check if there is no ventilation operation.

Operation stops

suddenly

(operation light

flashes)

To troubleshoot, check the following:

■ Check if the air filters are clean.

■ Check if there is no obstruction of the air inlet or outlet of the indoor and outdoor units.

The operation light flashes when the following errors are detected:

■ Activation of a safety device or malfunctioning thermistors.

■ Transmission error between the indoor and the outdoor unit.

Abnormal

functioning

The air conditioner may malfunction due to lightning or radio waves. To check, proceed as follows:

Step Action

1 Switch OFF the breaker.

2 Switch it back ON.

3 Check the operation by trying to operate with the remote control.