MITSUBISHI ELECTRIC TG-2000A - Manual (Page 97)

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This chapter describes the correction work required for replacing the G-50A due to fault while the charge
calculation function is used.
When the charge calculation function is used, it is not necessary to read the contents shown in this
attached sheet.
Example of performing Charge calculation data maintenance in the event of a G-50A fault
(For charge calculation (Without WHM connection))
The following shows an example of the correction method.
[Procedure]
1) Select the [Charge calculation data mainte-
nance] button.
Click the [Charge calculation data mainte-
nance] button, a maintenance group, on the
initial screen.
2) Select the G-50A to be corrected.
Select the G-50A replaced from Select from
G-50A.
3) Select the indoor unit icon.
When the indoor unit icon to be corrected is
clicked, the Unit charge calculation data main-
tenance screen is displayed.
4) Correct the charge calculation data.
Correct the charge calculation parameter for
the fault period to the value of "0". After
correction, the value is changed to blue.
* The correction is made from the day the fault occurred to the day of restoration.
5) Correct the indoor unit connected to the G-50A to replace.
Correct the charge calculation parameter (fault period only) of all indoor units to control within all
indoor units to the contents shown in 4) above.
6) Select the correction method for the fault period from the following plans.
To execute the charge calculation parameter for the fault period using the special method, examine
the correction method suitable to the system. As an example, the following plans are given.
P lan 1: Correction method using average value for one week before the fault
à to calculate the charge calculation parameter by multiplying the fault period (number of days)
using the average value for one week before the fault as the charge calculation parameter for
a day, and input it as the charge calculation parameter for the restoration date.
Plan 2: Correction method using only the value for the normal period
à to use only the normal period without using the charge calculation parameter for all indoor
units during the fault period. Consequently, the charge calculation parameter for all indoor
units during the fault period is corrected to "0".
7) Correct the charge calculation parameter in accordance with item 6) above.
Correct the charge calculation parameter for the indoor unit and date concerned using the
correction method for the fault period examined.
8) Select the re-calculation.
When the value has already been reset, select the Re-calculation to calculate the value again for
the month concerned.
Appendix 3: Correction to Charge Calculation in the Event of G-50A Replacement due to Fault
Note:
• It is necessary to perform the maintenance of the charge calculation data for the day of the
G-50A replacement on the next day after replacing the G-50A .
On the day of the G-50A replacement, the extraordinary charge calculation parameter value may
be calculated.
(The operation parameter for the last day is collected in the morning of the next day to calculate
the charge calculation.)
• Since it is unable to calculate the charge for the fault period when the G-50A is replaced, it is
necessary to take one of the following corrective measures in the event of a fault.
Note:
• When the charge calculation parameter is corrected using the Charge calculation data
maintenance function, the message "Execute re-calculation?" is displayed at the end of
Charge calculation data maintenance. In this case, execute the calculation again as required.
Unit charge calculation data maintenance screen