Panasonic S-36PU1E5A Service Manual page 583

E18 Faulty Communication in Group Control Wiring
1. Error Detection Method
When the main remote controller cannot communicate with a sub remote controller in the remote control group.
It is judged an error if a sub remote controller in a remote control group fails to communicate with the main remote controller
for a period of three minutes.
An indoor unit within the control group does not have its power on.
•
• The CHK pin and TEXT pin on the indoor unit in the control group are shorted.
•
The DISP pin of an indoor unit sub remote controller in the control group is shorted.
•
Remote control group wiring is opened.
•
More than one indoor unit in the control group is set to Main.
• An indoor unit in the control group is set to Separate.
2. Error Diagnosis
1 Indoor Unit
1-1 Is the indoor unit powered off?
Are the CHK pin, TEST pin and DISP pin on the indoor unit control
1-2
PC board short-circuited?
2 Substitute
2-1 Is the remote control group's wiring opened?
Sub
Remote
Check the group settings (Item Code 14) from the remote control's
Controller
2-2 detailed settings mode. Is the main remote controller (1) set to more
than one remote controller or to separate (0)?
Is the wiring of the remote control group wired according to the
2-3
wiring diagram?
2-4 Run the auto address setting again.
2-5 Run the auto address setting again after correcting the wiring of the remote control group.
3 Indoor
Is the wireless remote controller connected to on the indoor unit's
3-1
unit
control PC board?
control
Disconnect the connector mentioned above on the control PC board
PCB
of the indoor unit control PC board, and see whether the E18 goes off
3-2 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.)
3-3 Replace wireless remote control parts including wiring.
3-4 Replace the indoor unit control PC board.
•
For information on the remote control's detailed settings, refer to the Reference Materials.
•
For information on the procedures for replacing the Indoor unit control PCB, refer to the manual that is packaged with the
indoor unit service board.
A747931 : 4-Way Cassette Type
Ceiling Type (T2 type)
A747336 : 4-Way Cassette 60 x 60 Type
A747938 : Duct Type
EEPROM
TEST pin
CHK pin
OPTION
RC
CHK pin
TEST pin
EEPROM
RC
OPTION
5-27
Yes Power on
No 1-2
Yes Remove the short
No 2-1
Yes Correct the wiring
No 2-2
Yes 2-3
No 3-1
Yes 2-4
No 2-5
Yes 3-2
No 3-4
Yes 3-3
No 3-4
TEST pin
CHK pin
EEPROM
OPTION
RC
5