Daikin FTX25JVEA9 Service Manual page 307

Troubleshooting - Outdoor Unit Related
3.3.30 Transmission Error of DC Fan
U7
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When transmission error with DC fan microcomputer continued for 60 seconds
Decision
Conditions
"
Supposed
"
Causes
"
"
Troubleshooting
294
Incorrect connectors connection
DC fan microcomputer malfunction
Outside causes (noise, etc.)
Malfunction of control PC board receiving circuit
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
Are DC fan
PC board and control
PC board correctly
connected?
YES
NO
NO
Si18-201
Could be outside causes
including noise, etc.
Correct the connection to
restart.
Replace fan PC board.
(MF050)
Service Diagnosis