Mini VRF SYSTEM
Trouble Diagnosis
3
3-10
3. Mini VRF System Alarm Codes
2
Power on
1-3
Is the central control unit’s powered off?
Is the central control unit connected?
1-1
1-2
Replace all optional control PC board and/or wireless remote control parts including wiring.
Is there a short, miswiring, open, wrong contact or grounding
in the remote control’s wiring?
3-3
3-4
Disconnect the connector mentioned above on the control PC board
of the indoor unit control PC board, and see whether the E03 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.)
3-2
Are all the Main/Sub switches on the connected central control unit
set to Sub?
1-3
Is the indoor/outdoor operations line connected to the central
control unit opened?
1-5
2-2
3-1
Is the indoor unit under group control?
2-1
Correct the setting
3-1
Are the wires 1 (white) & 2 (black) to the remote control group
opened, have wrong contact or grounded?
2-2
3-2
1-2
2-1
1-4
1-5
Correct the setting
2-1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No 3-4
Correct the wiring
Yes
No
Replace the indoor
unit control board
3-3
Yes
No 3-4
Is the wireless remote controller and/or optional control PC board
connected to on the indoor unit’s control PC board?
3-1
Of the central control units that are connected, set only the uppermost central control unit to
Main and the others to Sub. The order from top to bottom is intelligent controller
ON/OFF controller.
system controller
1-4
Remote
controller
3 Indoor
unit
control
PC board
1 Central
control unit
E03 Error in Indoor Unit Receiving Signal from Remote Controller (central)
Error Detection Method
(When indoor unit(s) are connected)
Error Diagnosis
It is judged an error when there is no communication from any remote controller (collectively) in a 3-minute period or if there
is no communication from the central device in a 15-minute period.
When there was once communication, but during use the remote control wiring is opened or miswired.
The line to the central control unit for indoor/outdoor operations is opened.
The power to the central control unit is not on and remote controllers are not being used (or the indoor/outdoor operations
line to the central control unit is opened).
When remote controller are not being used, only the sub remote controller is set up.
•
•
•
•
1.
2.
Settings are made only for sub remote controller.
•
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.
•
ON
1
1
2
3
4
ON
1
2
3
4
5
6
7
7
8
ON
1
2
3
4
4
5
6
7
8
ON Side
OFF Side
ON Side
OFF Side
ON Side
OFF Side
Main: OFF Side
Sub: ON Side
Central Control Main/Sub Switch
Main: OFF Side
Sub: ON Side
Central Control Main/Sub Switch
Main: OFF Side
Sub: ON Side
Central Control Main/Sub Switch
Intelligent Controller
System Controller
ON/OFF Controller
SW1
SM830209-00̲Mini̲VRF SYS.indb 10
SM830209-00̲Mini̲VRF SYS.indb 10
2012/01/11 18:24:32
2012/01/11 18:24:32
