Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 134

SiBE26-701
Troubleshooting
*1: Connector code: X31A
*2: Method of voltage measurement
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the installation
conditions
NO
Is the stop valve
open?
YES
Is the
connector (*1)
for the low-pressure
NO
sensor correctly connected
to the outdoor unit
PC board?
YES
Measure the voltage (DC)
between the pins (2) and (3)
of the connector (refer to *2).
Is the
converted pressure
NO
based on the measured
voltage normal?
(refer to
*3).
YES
Check4 YES
(P.175)
Is low pressure
abnormally
low?
NO
Diagnosis by Remote Controller
Open the stop valve.
Connect correctry.
Replace the low pressure
sensor.
Correct the failure.
Replace the outdoor unit
PC board (A1P).
*3: Pressure/ voltage characteristic of the sensor
1.5
1.0
0.5
0
-0.5
-0.5 0 0.5 1 1.5
Output voltage V
PL=0.57V-0.28
PL: detected pressure (Mpa)
V: output voltage (V)
PL
2 2.5 3 3.5 4
Vcc
123