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(1) 7-segment and operation data retention
(a) 7-segment display
Operation information is displayed for checking various operation data during test run and for helping malfunction
diagnosis at servicing. Input data to microcomputer, contents of outdoor unit control, indoor unit registration
information, or other, are mainly displayed on the 7-segment LED.
(i) Operation information display
➀
Displays each item at 7-segment of 3-digit × 1 on the outdoor unit PCB.
➁
Display is controlled with the following buttons.
SW9: Setting button for order of 10 of display code display
SW8: Setting button for order of 1 of display code display
SW7: Data erase/write button
➂
3 seconds after fixing display code, data are displayed according to the code display.
(During setting buttons, Code No. is displayed)
If SW9 or SW8 is pressed during the data display, it returns to corresponding code display.
If SW9 or SW8 is pressed during the code display, code No. is changed according the button setting.
Example) If it is required to display the data of code [C23] instead of the data of code[C00] displayed,
(i) Press SW9 or SW8 and it turns from data display to code display of [C00]
(ii) Press 2-times of SW9 and 3-times of SW8 in the state of [C00] display, the code display
changes to [C23]
(iii) After 3 seconds passed, the data corresponding to [C23]is dispalyed.
➃
Code [C96]is operable item. It is possible to delete the retained operation data (data of 30 minutes
preceding an anomalous stop) by following resetting procedure.
<Resetting operation>
• Select code [C96]. If any anomalous data is retained, the data display [dEL] is shown 3 seconds
later.
• Pressing SW7 for 3 seconds erases the memory data on RAM.
(EEPROM data are not erased.)
• As the data are erased, the data display shows [- - -].
When no anomalous data are retained, it displays [---] as well.
• Unless the reset operation is performed, data are retained. Therefore, if normal operation is resumed
without the reset operation and an anomalous stop occurs again, no new anomalous data cannot be
retained, but former anomalous data are still retained unchanged.
➄
If you press SW8 (order of 1), the number changes 0
1
2 ... 9
0.
➅
If you press SW9 (order of 10), the number jumps to the leading code of each order of 10.
Data display [Cxx] and setting value display [Pxx] are considered to be continuous.
Example: Pressing SW9 at [C07] it changes to [C10], and press SW9 again, it changes to [C20].
: Pressing SW9 at [C90], it changes to [P00], and press SW9 again, it changes to [P10].
➆
Codes [C44] and [C45] are operable items. With the following reset operation, the cumulative
compressor operation time corresponding to the code No. can be erased (reset). (Reset of operation time
after replacing the compressor)
<Resetting operation>
• Select codes [C44] and [C45]. Cumulative compressor operation time to the present is displayed 3
seconds later.
• Pressing SW7 for 3 seconds erases the memory data.
However, the cumulative compressor operation time data in the 30 minutes log data preceding an
anomalous stop (if this retained log data are not deleted) are not erased by this procedure.
➇
Data display for spare items is left in blank.
(C) Data output
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