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13Troubleshooting
About the check codes
If there is a problem with the air handling unit or if the controller detects anything unusual with the system, a check
code is displayed in the warning list on the computer screen or the LCD of the controller.
Check code Description Action
C06 Communication error with the air handling unit Check the communication status of TCC-Link.
S06 Communication error with BMS-IFWH Check the communication status of RS-485.
S07 Communication error with BMS-IFDD Check the communication status of RS-485.
S15 File access error Check the SD card.
S17 File load error Check the main file.
S21 Mail transmission error Check the settings of the e-mail.
S22 Internal communication error Check the internal wiring and the main file.
Code other than the above Error detected in the air handling unit Check the air handling unit.
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