Toshiba RAV-HM301MUT-E Service Manual page 55

Trouble mode detected by remote controller or central controller (Link adapter)
Check code
No communication with header indoor unit
Not displayed at all
• Remote controller wiring is not correct.
(Operation on
remote controller
• Power of indoor unit is not turned on.
is impossible.)
• Automatic address cannot be completed.
No communication with header indoor unit
E01
• Disconnection of inter-unit wire between
remote controller and header indoor unit
∗1
(Detected by remote controller side)
Signal send trouble to indoor unit
E02
(Detected by remote controller side)
There are multiple master remote controllers.
E09
(Detected by remote controller side)
L20
Duplicated indoor central addresses on
communication of central control system
Central controller
(Detected by indoor/central controller side)
L20
—
∗2
Communication circuit trouble of central
Central controller
controller
(Send)
(Detected by central controller side)
C05
(Receive)
C06
—
Indoor Gr sub unit trouble
(Detected by central controller side)
Central controller
P30
*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
Cause of operation
Status of
Condition
air conditioner
Stop —
Stop
(Automatic reset)
Displayed when
∗ If central controller
trouble is
detected
exists, operation
continues.
Stop
(Automatic reset)
Displayed when
trouble is
∗ If central controller
detected
exists, operation
continues.
Stop Displayed when
(Follower unit trouble is
detected
continues operation.)
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Continues
trouble is
(By remote controller)
detected
Displayed when
Continuation/Stop
trouble is
(According
detected
to each case)
– 55 –
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.