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9-5. Diagnosis procedure for each check code
Check code
Check code name
Cause
Signal transmission error on the
remote control
Unable to send signals to indoor units
* The check code is not indicated on the central control device or the 7-segment indication on the outdoor unit.
The
communication wiring
between the remote control
and indoor units is
connected properly.
Connect the wiring properly.
The transmission circuit in the remote
control malfunctions.
➝ Replace the remote control.
Check code
Check code name
Cause
Communication error between the
indoor unit and remote control
(detected on the indoor unit)
No communication from the remote control/
communication adapter
The error is detected when the indoor unit cannot receive the signal from the wired remote control.
Check the communication wiring from the remote control A and B.
The check code [E03] is not indicated on the remote control as its communication is down.
However, the code is indicated on the compliant manager of TCC-LINK.
Check code
Check code name
Cause
Is the
inter-unit wire of remote
controls (A/B) normal?
Correct inter-unit cable of
remote control.
Correct connector connection
and check circuit wiring.
Is there no
disconnection or
connector contact error on
harness out of terminal
block of indoor
unit?
Is a group control
operation?
Is power of each indoor
unit turned on?
Is power applied
to remote control?
AB terminals: Approx.
DC18V
Is setup of two
remote controls without
header remote control?
Check power connection
status of indoor unit. (Turn on
power again.)
Check indoor P.C. board.
Defect ➝ Replace
Change one to header/other to
follower. (Remote control
address connector)
Check remote control P.C.
board.
Defect ➝ Replace
Communication error between the
indoor unit and remote control
(detected on the remote control)
1. Remote control inter-unit wire error
2. Indoor power error
3. Indoor P.C. board error
4. Remote control address setup error
5. Remote control P.C. board error
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