Daikin VRVIII-S Service Manual page 157

Troubleshooting by Indication on the remote control
Troubleshooting
146
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
SiENBE34-703
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).
(V3067)
(V3067)
Troubleshooting