Fault Detection Diagnosis (Fdd) Checklist; Fault Detection Diagnosis (Fdd) Codes - LG Multi V5 Service Manual

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.
6.
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.

Fault Detection Diagnosis (FDD) Codes

Table 21: FDD Error Codes.
Error Codes
E01
E02
E03
E04
E05
E06
E07
E08
E09
E10
System Error Same as Normal Operation
Display
E01
Indoor unit combination capacity is >130% or <80% less than outdoor unit rated capacity.
E02
E03
E04
E05
E06
E07
FDD was forced to terminate, or refrigerant auto charge terminated normally.
E08
E09
E10
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OTHER CONTROLS
Problem
System is unstable.
Temperature range error.
Can't operate FDD function for defrost.
Sensor check function error.
Only one indoor unit is present.
Button was not pressed for auto refrigerant charge function.
System off / wait to operate FDD function.
Need additional refrigerant.
System error has occurred
Setting Optional Modes
57