Daikin FCQ18PVJU Service Manual page 117

SiUS28-902_a
Troubleshooting
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Turn power supply off, and
turn power supply on again.
Return to normal?
NO
Electronic
expansion valve is
connected to X21A and
X22A of outdoor unit
P.C.B.
(A1P).
YES
Normal
when coil
check (*1) of the moving
part of the electronic
expansion valve is
checked.
YES
The connecting
cable is short-circuited or
disconnected.
NO
*Make measurement of resistance between the connector pins, and then make sure the resistance falls in
kΩ
the range of 40 to 50 .
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
(Gray) 6
Troubleshooting by Indication on the Remote Controller
YES
NO
NO
YES
Measuring points
1 - 6
2 - 6
3 - 6
4 - 6
External factor other than
malfunction (for example, noise
etc.).
After connecting, turn the power
off and then back on again.
Replace the moving part of the
electronic expansion valve.
Replace the connecting cable.
Replace the outdoor unit P.C.B.
(A1P).
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