Daikin SkyAir Service Manual page 207

Troubleshooting by Remote Controller Display / LED Display
Troubleshooting
*1: Voltage measurement point
*2: "Pressure Sensor", pressure / voltage characteristics table.
196
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check if the connector for
the pressure sensor (X17A)
is correctly connected to the
outdoor unit PC board (A1P)
Is it connected
correctly?
YES
Measure the voltage (V)
between the pins # (2) and
(3) of the above connector
(∗1).
YES
Is the relation
between the pressure and the
voltage normal?
(∗2).
YES
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-0.5 0
NO
NO
PH
PH = 1.38V-0.69
PH : Detected pressure (MPa)
V : Output Voltage (V)
0.5 1 1.5 2 2.5 3 3.5 4
Output voltage V V
DC
SiBE28-804
Connect correctly.
Replace the pressure
sensor (S1NPH).
Replace outdoor unit
PC board (A1P).
(V2808)
Troubleshooting