Daikin VRV III REYQ8PY1, Service Manual

Page: 320 / 452

Si37-701 Troubleshooting by Indication on the Remote Controller
Troubleshooting 309
Troubleshooting
Power ON
Power OFF
<Multi>
<Single>
Single : A5P, A8P
Multi
: A4P
Replace the inverter PC board.
∗
If the PC board replaced is badly
damaged, the compressor is
likely to get faulty. To make sure,
recheck the compressor.
Single : A6P, A7P or A9P
Multi
: A5P/A7P
Replace the fan driver PC
board.
∗
If the PC board replaced is badly
damaged, the fan motor is likely
to get faulty. To make sure,
recheck the compressor.
Recheck for the power supply. If
there is no problem with the power
supply, replace the A4P, A7P or
A3P noise filter PC board.
If the malfunction recurs, replace
the inverter PC board.
Recheck for the power supply. If
there is no problem with the power
supply, replace the A5P, A8P or
A4P inverter PC board.
∗
If the PC board replaced is badly
damaged, compressor is likely to
get faulty. To make sure, recheck
the compressor.
Check the harness, and then
replace it if necessary.
End of measures:
The malfunction may temporarily
result from on-site causes.
Causes: Instantaneous power
failure (open phase), noises, or
else.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
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 A3P
•
A3P X401A
⇔
X10A A4P
•
A1P X28A
⇔
X6A A4P
•
A4P X61A
⇔
X402A A3P
•
A4P X1A
⇔
X403A A3P
•
A4P P1,P2
⇔
Reactor terminal L1R
•
A4P P3,N3
⇔
P1,N1 A5P
•
A5P P2,N2
⇔
P1,N1 A7P
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 A3P
•
A4P or A7P X401A
⇔
X10A A5P or A8P
•
A1P or A3P X28A
⇔
X6A A5P or A8P
•
A5P or A8P X61A
⇔
X402A A4P or A7P
•
A5P or A8P X1A
⇔
X403A A4P or A7P
•
A5P or A8P P1,P2
⇔
Reactor terminal L1R
•
A5P or A8P P3,N3
⇔
P1,N1 A5P
•
A6P P2,N2
⇔
P1,N1 A7P
Has the
inverter PC board caused
damage?
Has the
fan driver caused
damage?
Stop (standby)
when the compressor
starts up.
The U2
malfunction recurs.
Stop (standby)
before the fan rotates.
Turn ON the power supply.
A