Error No. 03; Error Codes - LG Multi V5 Service Manual

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
Communication error between zone
03
controller and indoor unit
Does the error happen again after
the controller is replaced?
Does the error occur after the con-
troller cable is replaced?
Replace the indoor unit PCB.
If there isn't a controller to replace, use an operating controller from another indoor unit.
1
Plug the controller directly into the indoor unit PCB. If the error code does not come back after several minutes, the cable needs to be replaced.
2
Check the cable because the connection could be in error. Check for cable extensions. Check distances between the communication cable and main
electrical wiring. Ensure that the cable and wiring are at safe distances from one another to avoid being affected by electromagnetic waves.
After replacing the indoor unit PCB, perform the auto addressing procedure, and input unit address if system includes a controller. (All
3
connected indoor units must be turned ON before initiating the auto addressing procedure.)
Indoor unit PCB has not received com-
munications signal from zone controller.
1
Yes
Yes
3
CN-REMO: Remote controller connection
The PCB can differ from model to model.
Checking communication cable connection
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES

Details
1. Zone controller error.
2. Indoor unit PCB error.
3. Connection error or connection
4. Transmission cable error.
No
Replace the controller.
No
Check the communications cable and the
connection.

Error No. 03

Causes
wrong.
2
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
137