Panasonic CZ-256ESMC2 Operation Manual page 45

12 Supplementary Information
Errors occurred while operating during a thunder storm or because of electromagnetic interference.
Power the Intelligent Controller off and then on again. (Refer to "Powering the system off" stated on the
previous page)
As a rule, the Intelligent Controller should be powered off only in cases such as the above.
Correct management of air conditioning is not possible when the Intelligent Controller is powered off.
About distribution ratios and energy usage
The formulas used by the Intelligent Controller to calculate air conditioning distribution ratios and energy
usage are only approximations. They normally do not yield the same amounts that appear on bills from
electric and gas utilities.
Depending on operating conditions, there may be a margin of error between distribution ratios and
actual air conditioning amounts.
There may also be a small margin of error between the following, due to the rounding algorithms used in
distribution ratio calculations.
• "Distribution ratios of tenants in a group" and "100.00%"
• "Total of distribution ratios" and "Overall tenant distribution ratio"
• "Total of usage by each tenant" and "Total usage indicated by pulse meters"
• "Total of usage during regular hour, out of hours, and special days time zones" and "Total of all hours
time zones"
The Intelligent Controller does not measure energy use directly. It calculates energy distribution ratio
based on the inferred load ratio of each indoor unit. The results of the calculations should be regarded
as approximations.
About operating time totals
Air conditioning distributions and air conditioner operating times are calculated only for periods in which
the Intelligent Controller is powered on and in which there are no communications errors between the
Intelligent Controller and the air conditioners.
Therefore, no totals are accumulated for times when the Intelligent Controller is powered off or in which
communications errors occur.
You should be aware that errors in distribution ratios will become larger if conditions like the above
continue for a longer period of time.
Setting the current date and time
The current date and time should be set on a regular basis, since the system clock can gain or lose up
to about two minutes per month.
Touch panel operations are not possible at the following times.
• While the system is booting
• During connection checks
• Under cut-off processing
• During PC Card access (backup, restore)
About passwords
Passwords should be recorded and saved in a safe place. They should never be disclosed to third
parties.
If you forget your password, contact your dealer or service provider.
Flickering on the screen
This may occur occasionally. It is due to data refreshing and is not a malfunction.
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12 Supplementary Information
About Interface adaptors
You can use Interface adaptors to connect equipment that can be turned on and off (fans, room air
conditioners and so on) to the Intelligent Controller.
However, note that the following limitations apply.
For details, refer to the documentation of the equipment or contact your dealer or service provider.
Central control is supported for the following operations only.
• Start/stop
• Remote control prohibition (start/stop only)
Timer settings are supported, but settings other than "start/stop" and "remote control prohibition" are
ignored. Remote control prohibition is possible only when prohibition signal output from the Interface
adaptor has been connected to the equipment. Even in this case, the only operations that can be
prohibited are start and stop.
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For each screen from to , it appears in light purple during the ON operation.
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Alarm display
Alarm details are not shown.
The "C12" code is displayed (meaning Interface adaptor all-unit alarm).
However, this is possible only when a Interface adaptor alarm input signal has been connected.
About air conditioning distribution
1 Indoor unit fan speed data
Total operating times by fan speed are xed at high speed. (Units are treated as if they always
operated at high speed, even if the thermostat ON signal is connected to the unit.)
2 Electric heater ON time
Total electric heater ON time is not displayed.
3 Indoor unit capacity values
These cannot be read automatically. Set them as kW values in the "I/D unit settings" screen
(Distribution is not performed if they are not set.)
4 Product types
When connected via Interface adaptors, the system cannot distinguish PAC and GHP units.
You need to set the type as well when you set the indoor unit capacity.
(Refer to "Tenant name/Distribution group" screen
5 This applicable only to simple distribution. No loaded distribution can be made.
As long as it conforms to the contact speci cations of the Interface adaptors, any type of equipment
can be connected to the Intelligent Controller. However, you should avoid connecting equipment whose
operation can have grave consequences for life or property.
When only one centralized control unit is installed in a system without remote controller, if the centralized
control unit is damaged, the air conditioner(s) may become inoperable, or other troubles may occur. To
avoid this problem, we recommend that you install multiple centralized control units.
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