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The contents of trouble detected by remote controller or central controller (TCC-LINK)
∗
2 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.
∗
3 This trouble is related to communication of remote controller (A, B), central system (TCC-LINK U3, U4),
and [E01], [E02], [E03], [E09] or [E18] is displayed or no check display on the remote controller according
to the contents.
Operation of diagnostic function
Status of
air conditioner
Condition
Cause of operation
Check code
Judgment and measures
Not displayed
at all
(Operation
on remote
controller is
impossible.)
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.
Stop
—
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 phenomenon
generates.
E01
∗
2
No communication with header indoor unit
• Disconnection of inter-unit wire between
remote controller and header indoor unit
(Detected by remote controller side)
Stop
(Automatic reset)
∗
If center exists,
operation continues.
Displayed
when trouble
is detected
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.
E02
Signal send trouble to indoor unit
(Detected by remote controller side)
Stop
(Automatic reset)
∗
If center exists,
operation continues.
Displayed
when trouble
is detected
Sending trouble of remote controller
1. Check sending circuit inside of remote
controller.
→
Replace remote controller.
E09
There are multiple main remote controllers.
(Detected by remote controller side)
Stop
(Sub unit
continues operation.)
Displayed
when trouble
is detected
1. In 2-remote controllers (including wireless),
there are multiple main units.
Check that there are 1 main remote
controller and other sub remote controllers.
L20
Central
controller
L20
Stop
(Automatic reset)
Displayed
when trouble
is detected
1. Check setting of central control system
network address. (Network adapter SW01)
2. Check network adapter P.C. board.
Duplicated indoor central addresses on
communication of central control system
(Detected by indoor/central controller side)
—
∗
3
Central
controller
(Send)
C05
(Receive)
C06
Continues
(By remote controller)
Displayed
when trouble
is detected
1. Check communication wire / miss-wiring.
2. Check communication (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. (TCC-LINK)
Communication circuit trouble of central
control system
(Detected by central controller side)
—
Central
controller
P30
Continuation/Stop
(According
to each case)
Displayed
when trouble
is detected
Check the check code of the corresponding
unit from remote controller.
Indoor Gr sub unit trouble
(Detected by central controller side)
