The mode of a ceiling mounted air conditioner that uses multiple units at the same time must be matched to
either cooling or heating.
The inability to select either cooling or heating is a symptom that occurs because all air conditioners in
use are not matched to either cooling or heating.
Rest assured, it is not a product defect, so it will operate normally if you do as follows:
Try this
How to solve the problem when using the wireless remote control
Press the Start/Stop button on the remote control to turn off all indoor units of the air conditioner.
Wait approximately 5 minutes and then set either cooling or heating operation on all indoor units in order
to ensure normal operation.
※ If all relevant indoor units are not set to either cooling or heating when you switch to cooling using the wireless remote control, a buzzer will sound 5 times.
How to solve the problem when using the wired remote control
Press the Start/Stop button on the remote control to turn off all indoor units of the air conditioner.
Stop all air conditioners, then turn on all air conditioners, starting from an air conditioner where cooling
could not be selected.
If a central controller is used
Check if the central controller is partly or wholly locked.
Unlock the central controller functions individually or wholly. (Ask the person in charge to unlock the
central controller of the PC.)
If you set the central controller not to control each room separately, a warning message [HL] will appear on
the wired remote control of the indoor unit.
※ Central controller: A device that allows the management office to remotely control cooling/heating devices in buildings such as schools or places of business.
This guide was created for all models, so the images or content may be different from your product.
