Mini VRF SYSTEM
Trouble Diagnosis
3
3-7
3. Mini VRF System Alarm Codes
E01 Remote Controller Reception Error
(When indoor unit(s) are connected)
Error Detection Method
Error Diagnosis
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.
The nonvolatile memory (EEPROM) is not installed or faulty when turning on the power.
Remote controller check mode
Malfunctions of the remote controller itself (reception circuit error)
•
•
•
•
•
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.
•
1.
2.
When the CHK (check pin) and/or TEST (test pin) on the indoor unit control PC board are short circuited.
•
Indoor unit control PC board error
•
2
3
2-2
3-1
Is that indoor unit under group control?
Is auto address setting complete?
1-1
Is there an auto address setting error (Is the outdoor unit showing
an alarm)?
1-2
Conduct checks prior to auto address setting.
1-3
2-1
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
replacing the nonvolatile memory, write model data to it in the remote control detailed
settings mode.
3-6
Is there a short, miswiring, disconnection, wrong contact or
grounding in the remote control’s wiring?
3-7
Is the LED blinking on the indoor unit’s control PC board?
3-5
Are there any indoor units with their power off in the remote
control group’s wiring?
2-2
Are the CHK pin and/or TEST pin on the indoor unit control board
short-circuited?
3-1
3-3
3-5
Is the wireless remote controller and/or optional control PC board
connected to on the indoor unit’s control PC board?
3-2
3-4
3-5
Disconnect the connector mentioned above on the PC board of the
indoor unit control PC board, and see whether the E01 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.)
3-3
3-7
3-6
1-2
1-3
1-3
2-1
Power on
2-3
Remove the short
3-2
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Correct the wiring
2-4
Are nine or more indoor units connected in one remote control
group’s wiring?
2-3
Was the remote control group’s wiring changed after auto address
setting was complete? Alternatively, were group settings changed
in the remote control detailed settings mode?
2-4
2-5
3-1
Yes
Yes
No
No
No
No
No
Yes
No
Replace all optional control PC board and/or wireless remote control parts including wiring.
3-4
No main unit in the remote control group's wiring? Re-execute auto address setting.
2-5
Installation
or setting
related
Group
Control
Wiring
1 Auto
Address
Yes
No
Replace the indoor
unit’s control board.
Correct the wiring
Yes
No
SM830209-00̲Mini̲VRF SYS.indb 7
SM830209-00̲Mini̲VRF SYS.indb 7
2012/01/11 18:24:31
2012/01/11 18:24:31
