Daikin 10 - Page 112

●Troubleshooting
109
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
Master unit side of model using
the communication board
(optional)
2
Methods of Malfunction Detection
Check with the microcomputer
whether or not the transmission
with the slave unit is normally
performed.
3
Malfunction Decision Conditions
Class Conditions
10
When the transmission
between the master unit
and the slave unit is not
performed normally for
a period of given time or
more.
4
Supposed Causes
1Faulty control board (A1P)
1Faulty connection in the
transmission line
1Faulty communication board
1External noises or else
Control panel display
U9
Malfunction of Transmission with Slave Unit
Correct the connections.
NO
Normal?
YES
Check the communication
line with the slave unit for
connections.
Replace the control board
(A1P) and communication
board.
(Control board: see page
122/137)
00_PB00540A_M10.indb 109 2023/08/09 12:59:08