Daikin FTX25JVEA9 Service Manual page 302

Si18-201
3.3.26 Transmission Error between Microcomputers
LC
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the transmission error with INV fan microcomputer continues for 60 seconds
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
Service Diagnosis
Faulty fan PC board
Outside causes (noise, etc.)
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the error
re-generated when turning
the power supply
on again?
YES
Note: If the error should be caused by wiring connection, etc., fan transmission error (U7) is generated,
immediately replace the control PC board.
Troubleshooting - Outdoor Unit Related
NO
Could be outside causes
(noise, etc.)
Replace control PC board.
(MF045)
289