Daikin R48NUY2S - Page 375

Si20-701_B Troubleshooting by Remote Controller
368
Has the
power transistor
got defective?
Replace the fan
driver PCB.
∗Observe the
conditions of
the PCB.
If any wiring has
damage, replace
the harness.
YES
YES
NO
NO
NO
YES
Replace the
inverter PCB.
∗If the PCB
replaced is
badly
damaged, the
compressor is
likely to get
defective. To
make sure,
recheck the
compressor.
Replace the fan
driver PCB.
∗If the PCB
replaced is
badly
damaged, the
fan motor is
likely to get
defective. To
make sure,
recheck the
compressor.
Has
the inverter
PCB caused
damage?
Has the
fan driver caused
damage?
B
Check for connector connections:
Remove and insert the connectors
shown below. Furthermore, check
the connectors for terminal
conditions and continuity.
•
X1M power receiving terminal ⇔
X400A A2P
• A2P X401A ⇔ X10A A3P
• A1P X28A ⇔ X6A A3P
• A3P X61A ⇔ X402A A2P
• A3P X1A ⇔ X403A A2P
• A3P P1,P2 ⇔ Reactor terminal
L1R
• A3P P3,N3 ⇔ P1,N1 A4P
C
Power
OFF