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Outdoor Unit Functions
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Fault Detection Diagnosis (FDD) Checklist
1. A test run must be performed before running the automatic address procedure. After installation, recheck the auto addressing.
2. To start at one point after three (3) minutes when the initial power is turned on for the test run: After power is turned on, the MICOM data
is reset, and communications with the indoor units will start within three (3) minutes.
3. Indoor units must be series seven (7) and higher.
4. For the FDD test run, the results and errors of the test run are displayed only on the Master outdoor unit Main PCB SSD.
5. If the error occurred during the test tun, the system will operate following the last step after the test run is turned off. Change the DIP
switch to OFF, and then press and hold the SW01D reset button for two (2) seconds to reset all data and return to operation standby.
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simultaneously for more than five (5) seconds.
7. All indoor units are turned off, or the results are displayed for ninety (90) seconds after the test run is finished.
8. If all FDD functions wish to be used, first press the main PCB SW01D reset button for three (3) minutes.
9. A normal test run operates if LGMV version 7.1.1 or later is used.
OTHER CONTROLS
Setting Optional Modes
Fault Detection Diagnosis (FDD) Codes
Error Codes Display Problem
E01 Indoor unit combination capacity is >130% or <80% less than outdoor unit rated capacity.
E02 System is unstable.
E03 Temperature range error.
E04 Can’t operate FDD function for defrost.
E05 Sensor check function error.
E06 Only one indoor unit is present.
E07 Button was not pressed for auto refrigerant charge function.
E08 FDD was forced to terminate, or refrigerant auto charge terminated normally.
E09 System off / wait to operate FDD function.
E10 Need additional refrigerant.
System Error Same as Normal Operation System error has occurred
Table 21: FDD Error Codes.
E01
E02
E03
E04
E05
E06
E07
E08
E09
E10
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