Panasonic U-4LE1E5 Service Manual page 97

4. Mini VRF System Alarm Codes
3. Mini VRF System Alarm Codes
E02 Remote Controller Transmission Error
1. Error Detection Method
When the remote controller itself cannot transmit. Or when it cannot receive the signal it transmitted itself, or when they are
different and judged an error.
• Malfunction of the remote controller itself (transmit circuit error)
2. Error Diagnosis
1 Remote
1-1 Is the indoor unit under group control?
Control
Group
Are the wires 1 (white) & 2 (black) to the remote control group
1-2
Wiring
shorted or opened?
Group
2
Is the wireless remote controller and/or optional control PC board
2-1
Control
connected to on the indoor unit's control PC board?
Wiring
Disconnect the connector mentioned above on the board of the
indoor unit control PC board, and see whether the E02 goes off after
2-2 several minutes. (When doing so, if two remote controllers are
being used and the wireless remote controller is the main remote
controller, set the other remote controller as the main.)
2-3 Replace all optional control PC board and/or wireless remote control parts including wiring.
Is there a short, miswiring, open, wrong contact or grounding
2-4
in the remote control's wiring?
• The '/' in the table indicates the DC motor's indoor unit board/AC motor's indoor unit board.
• There is no TEST pin on the AC motor's indoor unit board.
•
Regarding the remote controller check, refer to the Reference Materials.
• For information on the procedures for replacing the nonvolatile memory (EEPROM) of the indoor unit and/or replacing the
indoor unit's control board, refer to the manual that is packaged with the indoor unit service board.
NOTE
Regarding the PCB photos for individual indoor units, refer to the Section "PCB AND FUNCTIONS" in the
TECHNICAL DATA.
OPTION
DC Motor Model Indoor unit Control Board AC Motor Model Indoor unit Control Board
5 - 9
Mini VRF SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
Yes 1-2
No 2-1
Yes Correct the wiring
No 2-1
Yes 2-2
No 2-4
Yes 2-3
No 2-4
Yes Correct the wiring
Replace the indoor
No unit's control PC
board
OPTION
5