Trouble mode detected by remote controller or central controller (Link adapter)
*1 The check code cannot be displayed by the wired remote controller.
(Usual operation of air conditioner becomes unavailable.)
For the wireless models, a trouble is notified with indication lamp.
*2 This trouble is related to communication of remote controller (A, B), central system (Uh (U3,U4)), and [E01],
[E02], [E03], [E09] or [E18] is displayed or no check display on the wired remote controller according to the
contents.
Operation of diagnostic function
Check code
Not displayed at all
(Operation on
remote controller
is impossible.)
E01
∗
1
E02
E09
L20
Central controller
L20
—
∗
2
Central controller
(Send)
C05
(Receive)
C06
—
Central controller
P30
Cause of operation
No communication with header indoor unit
• Remote controller wiring is not correct.
• Power of indoor unit is not turned on.
• Automatic address cannot be completed.
No communication with header indoor unit
• Disconnection of inter-unit wire between
remote controller and header indoor unit
(Detected by remote controller side)
Signal send trouble to indoor unit
(Detected by remote controller side)
There are multiple master remote controllers.
(Detected by remote controller side)
Duplicated indoor central addresses on
communication of central control system
(Detected by indoor/central controller side)
Communication circuit trouble of central
controller
(Detected by central controller side)
Indoor Gr sub unit trouble
(Detected by central controller side)
Status of
air conditioner
Stop
Stop
(Automatic reset)
∗
If central controller
exists, operation
continues.
Stop
(Automatic reset)
∗
If central controller
exists, operation
continues.
Stop
(Follower unit
continues operation.)
Stop
(Automatic reset)
Continues
(By remote controller)
Continuation/Stop
(According
to each case)
Condition
—
Judgment and measures
Power supply trouble of remote controller,
Indoor
EEPROM trouble
1. Check remote controller inter-unit wiring.
2. Check remote controller.
3. Check indoor power wiring.
4. Check indoor P.C. board.
5. Check indoor EEPROM.
(including socket insertion)
Automatic address repeating phenom-
enon generates.
Receiving trouble from remote controller
1. Check remote controller inter-unit wiring.
2. Check remote controller.
3. Check indoor power wiring.
4. Check indoor P.C. board.
Sending trouble of remote controller
1. Check sending circuit inside of remote
controller.
→
Replace remote controller.
1. In 2-remote controllers (including wireless),
there are multiple header units.
Check that there are 1 master remote
controller and other sub remote controllers.
1. Check setting of central control system
network address. (Network adapter SW01)
2. Check network adapter P.C. board.
1. Check communication wire / miswiring
2. Check communication (Uh (U3,U4) terminals)
3. Check network adapter P.C. board.
4. Check central controller (such as central
control remote controller, etc.)
5. Check terminal resistance. (”1 : 1 Model”
Connection Interface P.C. board or indoor
P.C. board)
Check the check code of the corresponding
unit from remote controller.
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
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