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Operating Instructions
Intelligent Controller
200
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 of
f unexpectedly
y
Has the screen turn of
f automatically?
The power is still on, so try touching the screen.
y
Irrespective of the set time, the screen may turn of
f 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 suf
fers 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 of
f this unit and the communication
adaptor
, then turn of
f 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.
201
Appendix
Appendix
Cautions when cleaning and maintaining
Take care of the following when cleaning and maintaining the unit.
Unplug the power cord when cleaning.
The power connections of the unit include parts with very high voltage which can be extremely dangerous, so take care when clea
ning. Before
cleaning make sure you stop the system and unplug the power plug from the power outlet.
Use a neutral detergent
When removing dirt from the main unit and the surface of the touch panel, use a soft cloth dampened with warm water or a neutra
l detergent
solution, then wring well before wiping.
Avoid using volatile chemicals, such as benzene or thinners, abr
asive powders, or liquid pest sprays, as these can damage the u
nit’
s finish and
the touch panel.
Do not let water get on the unit directly
Take care not to get water directly on the unit. Electric insulation may worsen leading to possible malfunction and electric shock.
Do not disassemble.
Do not disassemble this unit. This may cause malfunctions which may lead to extremely dangerous electrocution.
Checking the fixtures
You should check the fixtures for rust and corrosion a few times
a year to ensure the control panel is still firmly attached.
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