Panasonic U-4LE1E5 Service Manual page 99

3. Mini VRF System Alarm Codes
E12 Start of Auto Address Setting Prohibited Due to Auto Address Setting Being in
Progress
1. Error Detection Method
It is judged an error if a command to start auto address setting comes from another controller during auto address setting.
This occurs in a system that has more than one outdoor unit and operating lines among the indoor/outdoor units
•
(networked wiring), when an instruction to start auto address setting is given from another controller during the auto
address setting process.
2. Error Diagnosis
1 Auto When one controller in a networked system is running auto address setting, it is not possible
Address 1-1 to start auto address setting from another controller.
Wait until the auto address setting in progress finishes.
E13 Error in Indoor Unit Transmitting Signal to Remote Controller
1. Error Detection Method
It is judged an error when an indoor unit cannot itself receive a signal that it sent to its remote controller(s).
• Indoor unit control PC board faulty
The remote control's wires 1(white) and 2(black) are shorted or opened.
•
2. Error Diagnosis
1 Indoor unit Are the remote control's wires 1(white) and 2(black) are shorted or
1-1
control opened?
PCB
1-2 Replace the indoor unit control PC board.
•
For information on the procedures for replacing the Indoor unit control PC board, refer to the manual that is packaged with the
indoor unit service board.
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Mini VRF SYSTEM
Trouble Diagnosis
Yes Correct the wiring
No 1-2
5