Service manual

SiUS28-902_a Troubleshooting by Indication on the Remote Controller
Troubleshooting 118
Troubleshooting
∗1: Voltage measurement point
∗2: Refer to Pressure Sensor, Pressure / Voltage Characteristics table on P.168.
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts could be damaged.
The
relationship
between the *1
VH and high pressure
is normal (see *2) when
voltage is measured between
X17A pins (1) and (3) of
outdoor unit P.C.B.
(A1P)
(see *1).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace the outdoor unit P.C.B.
(A1P).
YES
YES
The high
pressure sensor is
connected to X17A of
outdoor unit P.C.B.
(A1P).