Panasonic U-4LE1E5 Service Manual page 87

3. Mini VRF System Alarm Codes
E01 Remote Controller Reception Error
1. Error Detection Method
It is judged an error if no self-addressed communication is sent to the remote controller in a 3-minute period.
When a remote controller is set to sub remote controller.
•
•
When there are nine or more indoor units in a remote control group's wiring.
•
When the CHK (check pin) and/or TEST (test pin) on the indoor unit control PC board are short circuited.
•
The nonvolatile memory (EEPROM) is not installed or faulty when turning on the power.
•
Indoor unit control PC board error
•
Remote controller check mode
•
Malfunctions of the remote controller itself (reception circuit error)
2. Error Diagnosis
1 Auto
1-1 Is auto address setting complete?
Address
Is there an auto address setting error (Is the outdoor unit showing
1-2
an alarm)?
1-3 Conduct checks prior to auto address setting.
Group
2
2-1 Is that indoor unit under group control?
Control
Wiring
Are there any indoor units with their power off in the remote
2-2
control group's wiring?
Are nine or more indoor units connected in one remote control
2-3
group's wiring?
Was the remote control group's wiring changed after auto address
2-4 setting was complete? Alternatively, were group settings changed
in the remote control detailed settings mode?
2-5 No main unit in the remote control group's wiring? Re-execute auto address setting.
3 Installation
Are the CHK pin and/or TEST pin on the indoor unit control board
3-1
or setting
short-circuited?
related
Is the wireless remote controller and/or optional control PC board
3-2
connected to on the indoor unit's control PC board?
Disconnect the connector mentioned above on the PC board of the
indoor unit control PC board, and see whether the E01 goes off after
3-3 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.)
3-4 Replace all optional control PC board and/or wireless remote control parts including wiring.
3-5 Is the LED blinking on the indoor unit's control PC board?
The nonvolatile memory (EEPROM) on the indoor unit's control PC board is either not
installed, improperly installed or the nonvolatile memory is faulty. Correct this or after
3-6
replacing the nonvolatile memory, write model data to it in the remote control detailed
settings mode.
Is there a short, miswiring, disconnection, wrong contact or
3-7
grounding 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.
(When indoor unit(s) are connected)
5 - 7
Mini VRF SYSTEM
Trouble Diagnosis
Yes 1-2
No 1-3
Yes 1-3
No 2-1
Yes 2-2
No 3-1
Yes Power on
No 2-3
Yes Correct the wiring
No 2-4
Yes 2-5
No 3-1
Yes Remove the short
No 3-2
Yes 3-3
No 3-5
Yes 3-4
No 3-5
Yes 3-6
No 3-7
Yes Correct the wiring
Replace the indoor
No
unit's control board.
5