Specifications

Troubleshooting for Outdoor Unit SiBE18-821
318 Troubleshooting
7.15 Malfunction of High Pressure Sensor
Remote
Controller
Display
JA
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Decision
Conditions
When the high pressure sensor is short circuit or open circuit.
Supposed
Causes

Defect of high pressure sensor

Connection of low pressure sensor with wrong connection.

Defect of outdoor unit PCB.
Troubleshooting
∗
1: Voltage measurement point
∗
2: Refer to “Pressure Sensor”, pressure / voltage characteristics table on P351.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The
high pressure
sensor is connected to
X17A of outdoor unit
PC board
(A1P).
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 PC
board (A1P)
(see ∗1).
Replace the high pressure
sensor.
(Q0564)
Connect the high pressure
sensor and turn on again.
NO
Replace outdoor unit PC
board (A1P).
YES
YES
NO