Outdoor Unit: Malfunction Of High Pressure Sensor - Daikin Super Multi Plus D-Series Service Manual

Troubleshooting for Outdoor Unit

7.13 Outdoor Unit: Malfunction of High Pressure Sensor

JA
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Detection
Malfunction
When the high pressure sensor is short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗1: Voltage measurement point
∗2: Refer to pressure sensor, pressure / voltage characteristics table on P328.
306
Defect of high pressure sensor
Connection of low pressure sensor with wrong connection.
Defect of outdoor unit PCB.
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
The high
pressure sensor is
connected to X46A of
outdoor unit PCB
(A1P).
YES
The
relationship
between the ∗1
VH and high pressure
is normal (see ∗2) when
voltage is measured between
X46A pins (1) and (3) of
outdoor unit PCB
(A1P)
(see ∗1).
NO
Outdoor unit PCB A1P
Microcomputer
A/D input
NO
YES
+5V
GND
*2 Measure DC voltage here.
Connect the high pressure sensor
and turn on again.
Replace outdoor unit PCB A1P.
Replace the high pressure sensor.
X46A
4 Red
3 Black
2
White
1
(Q0433)
Troubleshooting
SiEBE18-526
(Q0432)