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Appendix
Appendix
Settings related
Limitations on changes to settings
There may be limitations on the changes you can make to settings depending on the model of air conditioning unit.
For example:
y You cannot make changes to “Heat” when the unit is a specialised cooling machine
y With the exception of some models, oor mounted units do not allow you to change the fan speed from “High”.
y You will not be able to change the airow direction on ceiling embedded types if they don’t have aps
So please use this unit with consideration for the peculiarities of each of the units.
Contact the place of purchase or your servicing agent for details.
Standby power (with time distribution)
This unit calculates distribution based on the operating times of the indoor units. The electricity and gas consumed while stopped (standby
power) is not distributed.
For example, if no air conditioners operate for a month, the standby power is not distributed to any distribution group. If an indoor unit operates
for even a minute, however, all of the standby power is distributed to the distribution group to which the indoor unit belongs.
With load distribution the standby power is included in the distribution.
The display on the screen when making changes
When you have made changes to the settings for indoor units on this unit, you may see the display returning temporarily (especially when
performing batch operations). This is just a delay caused by communication and is not indicative of a malfunction.
Air conditioning distribution ratios and air conditioning usage
The methodology adopted on this unit for calculating air conditioning distribution ratios and air conditioning usage is only a simplied one. There
will be differences from the usage volumes billed by the electricity and gas providers.
Depending on operating conditions, there will be differences from the actual air conditioning volumes and the distribution ratios.
Due to the rounding of fractions when calculating distribution ratios, you will observe differences arising between the following pairs of data.
y “Distribution rates of areas within a distribution group” and “100.00%”
y “Total of the distribution rate breakdown” and “distribution rate of the entire area”
y “Total of usage in each area” and “total usage according to the pulse meter”
y “Total of usages for in hours, out of hours, and cut-off days” and “usage for the whole time”
As this unit calculates distributions (proportional allocation) through a comparison of load estimated for each indoor unit rather than measuring
energy directly, please use the calculations only as a guide.
The current time and date settings
The unit’s clock is accurate to ±30 seconds per month (at a normal temperature of 25 °C), regularly adjust the time and date against a reliable
source.
About distribution data
If you remove an air conditioning unit after accumulating distribution data, all accumulated values for that air conditioning unit are deleted, so it
will not be possible to view distribution data that includes that air conditioning unit after it is removed.
Before removing the unit, output (save) the distribution data as a CSV le to a USB memory device.
The output method for CSV les is the same as for outputting histories. (→ “Outputting (saving) logs as a CSV le” (P.60))
Things you should know
197
Appendix
Appendix
Miscellaneous
Indemnity
This company shall not compensate in the following cases.
y If the password is found out by a third party and problems result
y If a USB memory device malfunctions and backed up data (accumulated data, distribution data) is lost
Where large errors can occur in calculation
Some models (semi-centralised models, oor mounted models, etc.) and old models with electric heaters for example, may show large
differences in calculations of air conditioning distribution ratios. Furthermore, if you use large pan type humidiers that use a lot of power, the
operating times of the humidiers will not be reected in the calculation of the distributions, leading to a large difference.
Contact the place of purchase or your servicing agent for details.
Remote control-less systems
In a system without remote controllers where only one centralised device has been installed, if that device breaks down then you may be faced
with the problem of not being able to run the air conditioning units. It is our recommendation to install multiple centralised devices for safety
purposes.
The identication number
You should take a note of the identication number and keep it in your records. You should also take care not to reveal the number to a third
party.
Contact the place of purchase or your servicing agent if you forget the number.
Screen disruptions
There may be some disruption to the screen when it is refreshing, but this is not indicative of a malfunction.
Things you should know
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