Ja" Outdoor Unit: Malfunction Of Discharge Pipe Pressure Sensor - Daikin VRV II RXYQ5MY1B Service Manual

SiE39-404
2.30 "JA" Outdoor Unit: Malfunction of Discharge Pipe Pressure
Sensor
JA
Remote
Controller
Display
Applicable
RXYQ5~48M
Models
Method of
Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Detection
Malfunction When the discharge pipe 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 P313.
Troubleshooting
Defect of high pressure sensor system
Connection of low pressure sensor with wrong connection.
Defect of outdoor unit PC board.
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 PC
board (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 PC
board (A1P)
(see ∗1).
NO
Outdoor unit PC board A2P
GND
Microcomputer
A/D input
*2 Measure DC voltage here.
Troubleshooting by Indication on the Remote Controller
NO
YES
+5V
Connect the high pressure sensor
and turn on again.
Replace outdoor unit PC board
A1P.
Replace the high pressure sensor.
X46A
Red
Black
White
(V2807)
(V2806)
207