Daikin E-Series Service Manual page 378

SiAU18-715
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
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 PC
board (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 the range of 40 to 50Ω.
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
(Gray) 6
YES
NO
NO
YES
Measuring points
1 - 6
2 - 6
3 - 6
4 - 6
Troubleshooting for Outdoor Unit
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 outdoor unit PC
board (A1P).
(Q0555)
(V3067)
365