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Appendix
Appendix
Troubleshooting
Check the following before requesting repairs.
Due to the dangers involved, do not perform repairs yourself.
Symptom
Cause and measures
Scheduling isn’t working properly
y
Have you set the calender and time?
Scheduling cannot operate if you set the calender and time but neglect to register the schedule.
y
Are the current settings for the date and time correct?
If the current time is not set properly, the schedule may be starting at another time.
The distribution ratio always becomes 100%
y
Check the distribution group and area group settings.
If you put only one area group in a single distribution group or only one indoor unit in a single area group,
the distribution ratio will always be 100%, and the calculations are meaningless.
The power turns off unexpectedly
y
Has the screen turn off automatically?
The power is still on, so try touching the screen.
y
Irrespective of the set time, the screen may turn off at start up.
The display is taking a long time to update even after
performing operations with the screen.
y
Depending on the communication status of the connected air conditioning units, it may take some time.
The screen will update if you wait a moment.
Screen of the colour liquid crystal display
y
There may be some dots on the screen that do not light or stay lit constantly, but this is not indicative of a
malfunction.
Furthermore, it is characteristic for colour liquid crystal displays to show some discolouration due to
changes in temperature, etc., but this is not indicative of a malfunction.
No operation even after touching buttons
y
After long term use, there may be a shift in the positioning of the operating positions on the touch panel
compared to the screen’s position.
Contact the place of purchase or your servicing agent.
This unit suffers a malfunction while you have
prohibited operations on local remote controllers and
you are unable to change settings on air conditioning
units, such as starting or stopping operation
y
As a stop gap measure until service personnel can visit, turn off this unit and the communication
adaptor, then turn off the indoor units and turn them back on. You will not be able to use the local remote
controllers. You will be unable to operate systems that do not have remote controllers.
There is a power outage and the devices do not
automatically restore themselves after the power has
been restored
y
This unit does not restore itself automatically after power has been restored. When a scheduled time is
reached, the unit will switch to the scheduled setting.
Not even one indoor unit is loaded
y
Conduct a confirmation of the configuration.
The following message appears on the screen
y
If there are changes to the system of air conditioning units, this message is displayed when you touch
[Check configuration].
y
If this message is displayed, contact the place of purchase or your servicing agent.
