Daikin SkyAir Super Inverter 70 D Series Service Manual page 166

SiE25-110
Troubleshooting
* Measure the resistance between each pin of
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn the power supply
off once and back on.
Normal reset?
NO
Is the
electronic expansion
valve coil connected
to outdoor unit
PC board?
YES
With remote
controller ON, doesn't
the unit operate and
is "E9" displayed?
NO
Is there
difference in
temperature before and
after solenoid valve
(Y2S) during
operation?
NO
connector and make sure that the resistance
ranges between 40 and 50Ω.
1
2
3
4
5
Troubleshooting by Remote Controller Display / LED Display
YES
NO
YES
Is
coil resistance
of electronic expansion
valve normal?
(40 to 50Ω)
(*)
YES
Measurement point
1—5
2—5
3—5
4—5
Problem could be caused by
external factor (noise, etc.)
other than malfunction.
Connect correctly.
Replace the motorized valve coil.
Replace the main unit of solenoid
valve (Y2S).
NO
Replace the electronic expansion
valve coil.
Replace the outdoor unit PC board
(A1P).
(S2585)
157