Transmission Error Between Outdoor Unit And Bp Unit - Daikin FTX25JVEA9 Service Manual

Si18-201
3.3.28

Transmission Error between Outdoor Unit and BP Unit

U4
Outdoor Unit
Indication
Method of Transmission error is detected when the data from BP unit could not be correctly received.
Malfunction
Detection
Malfunction When the data from BP unit could not be correctly received continuously for 15 seconds
Decision
Conditions
"
Supposed
"
Causes
"
"
Troubleshooting
Service Diagnosis
Incorrect connection of transmission wire
Connection from Side-A of BP is not carried out.
BP determined numbers are different from actual BP numbers.
Distortion of power supply wave
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn the power supply off.
Check the transmission wire
between outdoor unit - BP
unit
Is it normal?
YES
Is filter PC board normal?
YES
Turn the power supply back
on.
Are the
connection BP numbers
lit on after displaying
YES
888?
NO (blinking)
Set the numbers again.
Turn the power supply on
again.
Display mode completed
1
2
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Troubleshooting - Outdoor Unit Related
NO
NO
Check the transmission
wire and the connection
orders.
Replace filter PC board.
(MF047)
291