Toshiba BMS-SM1280HTLE Service Manual page 50

No.
2 Check the RS-485 send circuit of the interface.
Enable the test mode 2 at the interface, and check that communication waveform is output between A and B of the
RS-485 terminal block of the interface.
OK:
The RS-485 send circuit of the interface is normal.
3 Check the RS-485 send circuit of the controller.
After checking that the Digital Input / Output Relay Interface or the Energy Monitoring Relay Interface is set in the
setting file, check that communication waveform is output between A and B of the RS-485 terminal block of the
controller.
OK:
The RS-485 send circuit of the controller is normal.
15-8.How to Identify Defective Part at C06 (Receive Failure
with TCC-LINK Central Management Device)
Occurrence
No.
Check with the handy remote controller if E04 (Indoor and outdoor communication circuit failure) has occurred.
(If E04 has occurred)
1
(If no E04 has occurred)
Check if the C06 occurred on all the air conditioners or on some of them.
(When occurred on some of the air
conditioners)
2
(When occurred on all of the air
conditioners)
Check if the address setting in the setting file matches that of the air conditioner.
• Defective part:
3
The address setting in the setting file or the air conditioner.
• Solution:
Change the address in the setting file or the air conditioner.
Check point
Error message
Error message
Check point
Error message
• Defective part:
TCC-LINK wiring
• Solution:
Check the connection for each outdoor unit system, and identify the
defective part (the outdoor system) in the communication wiring.
• Defective part:
TCC-LINK wiring between the indoor unit and the controller.
• Solution:
Perform the following checks.
Error message
• Defective part:
TCC-LINK wiring on the air conditioners
• Solution:
Identify the defective part of the communication wiring based on the
C06 occurrence location and the schematic, and check the wiring
connection state and the continuity.
• Defective part:
TCC-LINK wiring on the controller
• Solution:
Check the communication wiring continuity.
Error message
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