Daikin Super Multi Plus D-Series, Руководство по обслуживанию

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Troubleshooting for Outdoor Unit SiEBE18-526
306 Troubleshooting
7.13 Outdoor Unit: 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 P328.
(Q0432)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace outdoor unit PCB A1P.
YES
YES
The high
pressure sensor is
connected to X46A of
outdoor unit PCB
(A1P).
Outdoor unit PCB A1P
GND
High pre
ssu
re
s
en
s
or
(Q0433)
Red
Black
White
4
3
2
1
+5V
X46A
Microcomputer
A/D input
*2 Measure DC voltage here.