137
Error Codes
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. Description Details Causes
03
Communication error between zone
controller and indoor unit
Indoor unit PCB has not received com-
munications signal from zone controller.
1. Zone controller error.
2. Indoor unit PCB error.
3. Connection error or connection
wrong.
4. Transmission cable error.
1
If there isn't a controller to replace, use an operating controller from another indoor unit.
2
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.
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.
3
After replacing the indoor unit PCB, perform the auto addressing procedure, and input unit address if system includes a controller. (All
connected indoor units must be turned ON before initiating the auto addressing procedure.)
Does the error happen again after
the controller is replaced?
1
Does the error occur after the con-
troller cable is replaced?
Replace the indoor unit PCB.
3
Replace the controller.
Check the communications cable and the
connection.
2
No
No
Yes
Yes
CN-REMO: Remote controller connection
The PCB can differ from model to model.
Checking communication cable connection
Error No. 03
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
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