Troubleshooting by Indication on the Remote Controller
101
Note:
∗
1. Make a comparison between the voltage of the
pressure sensor and that read by the pressure gauge.
(As to the voltage of the pressure sensor, make
measurement of voltage at the connector, and then
convert it to pressure.
)
∗
2: Make measurement of voltage of the pressure sensor.
Refer to P.346.
Refer to P.372.
NO
YES
Check
if the “high
pressure” value
and the actual
measurement value
by pressure
sensor are the
same.
Replace the
outdoor unit main
PCB.
· The high pressure sensor is normal, and the
pressure detected with the PCB is also normal.
· The high pressure has really become high.
CHECK 1
Remove the causes by which the high
pressure has become high.
A
CHECK 12
+5V
(4)
(3)
(2)
(1)
Red
Black
White
Connector for high
pressure sensor (Red)
High
pressure
sensor
Micro-computer
A/D input
Make measurement of DC voltage
between these wires.
CHECK 1
CHECK 12
