Service manual

ESIE03–01 Troubleshooting
Part 3 – Troubleshooting 3–5
3
3
4
5
1
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:
P Check if the breaker has switched OFF or the fuse has blown.
P Check if the batteries are placed in the remote controller.
P Check if the address switch is set correctly. See page 4–5.
P Check if the timer is set correctly.
Poor cooling or
heating
To troubleshoot, check the following:
P Check if the filters are clean.
P Check if there is no obstruction of the air inlet or outlet of the indoor and outdoor units.
P Check if the temperature settings are correct.
P Check if all windows and doors are closed.
P Check if the air flow and air direction are set correctly.
P Check if there is no ventilation operation.
Operation stops
suddenly
(operation light
flashes)
To troubleshoot, check the following:
P Check if the air filters are clean.
P 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:
P Activation of a safety device or malfunctioning thermistors.
P 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 controller.