Panasonic S-36PU1E5A Service Manual page 576

E06 Outdoor Unit Failed to Receive Serial Communication Signals from Indoor Unit
(When indoor unit(s) are connected)
1. Error Detection Method
It is judged an error when there is no transmission (reply) from the indoor unit to the outdoor unit for a period of three minutes.
The indoor unit is not turned on.
•
• The DISP pin of the indoor unit is shorted.
•
There is a short, open, wrong contact or grounding of the indoor/outdoor operation line.
•
The signal output control PC board (optional control PC board) inside the indoor unit has failed.
•
The thermistor inside the indoor unit is grounded.
2. Error Diagnosis
1 Indoor unit
1-1
power
2 Indoor/
outdoor
2-1
operation
line
3 Indoor
3-1
units
control
PC board
3-2
5
3-3
3-4
3-5
•
For information on the procedures for replacing the indoor unit's control board, refer to the manual that is packaged with
the indoor unit control PCB.
A747931 : 4-Way Cassette Type
Ceiling Type (T2 type)
EEPROM TEST pin
OPTION
A747336 : 4-Way Cassette 60 x 60 Type
RC
Is the indoor unit powered off?
Is the indoor/outdoor operation line shorted, opened,
grounded or has a wrong contact?
Are the DISP pin and CHK pin on the indoor unit control PC board
short-circuited?
Is the wireless remote controller connected to on the indoor unit's
control PC board?
Disconnect the connector mentioned above on the control PC board
of the indoor unit control PC board, and see whether the E06 goes off
after 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.)
Replace wireless remote control parts including wiring.
Indoor unit control PC board failure
RC
CHK pin
CHK pin
OPTION
EEPROM
TEST pin
Replace board.
A747938 : Duct Type
EEPROM TEST pin
OPTION
5-20
Yes Power on
No 2-1
Yes Correct the wiring
No 3-1
Yes Remove the short
No 3-2
Yes 3-3
No 3-5
Yes 3-4
No 3-5
RC
CHK pin