Toshiba RAV-GM 801UT-E Service Manual page 68

Failure mode detected by remote controller or central controller (TCC-LINK)
Operation of diagnostic function
Check code Cause of operation
Not displayed
No communication with header indoor unit
at all
• Remote controller wiring is not correct.
(Operation
• Power of indoor unit is not turned on.
on remote
• Automatic address cannot be completed.
controller is
impossible.)
No communication with header indoor unit
E01
• Disconnection of inter-unit wire between
∗2
remote controller and header indoor unit
(Detected by remote controller side)
Signal send trouble to indoor unit
E02
(Detected by remote controller side)
There are multiple main remote controllers.
E09
(Detected by remote controller side)
L20
Duplicated indoor central addresses on
communication of central control system
Central
(Detected by indoor/central controller side)
controller
L20
—
∗3
Central Communication circuit trouble of central
controller control system
(Send) (Detected by central controller side)
C05
(Receive)
C06
—
Indoor Gr sub unit trouble
Central
(Detected by central controller side)
controller
P30
∗2 The check code cannot be displayed by the wired remote controller.
(Usual operation of air conditioner becomes unavailable.)
For the wireless models, an 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.
Status of
Condition
air conditioner
Stop —
Stop
Displayed
(Automatic reset)
when trouble
∗ If center exists,
is detected
operation continues.
Stop
Displayed
(Automatic reset)
when trouble
∗ If center exists,
is detected
operation continues.
Stop Displayed
(Sub unit
when trouble
continues operation.)
is detected
Displayed
Stop
when trouble
(Automatic reset)
is detected
Displayed
Continues
when trouble
(By remote controller)
is detected
Continuation/Stop
Displayed
(According
when trouble
to each case)
is detected
– 68 –
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 phenomenon
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 main units.
Check that there are 1 main 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 (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)
Check the check code of the corresponding
unit from remote controller.