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

Troubleshooting by Indication on the Remote Controller
2.31 "JC" Outdoor Unit: Malfunction of Suction Pipe Pressure
Sensor
JC
Remote
Controller
Display
Applicable
RXYQ5~48M
Models
Method of
Malfunction is detected from pressure detected by low pressure sensor.
Malfunction
Detection
Malfunction When the suction 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.
208
Defect of low pressure sensor system
Connection of high 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 low
pressure sensor is
NO
connected to X45A (blue)
of outdoor unit PC
board (A1P).
YES
The
relationship
between the ∗1
VH and low pressure is
YES
normal (see ∗2) when voltage
is measured between X45A pins
(2) and (3) of outdoor unit
PC board (A1P)
(see ∗1).
NO
Outdoor unit PC board A2P
Microcomputer
A/D input
*2 Measure voltage here.
+5V
GND
Connect low pressure sensor
property and restart system.
Replace outdoor unit PC board
A1P.
Replace the low pressure sensor.
X45A
Red
Black
White
(V2809)
Troubleshooting
SiE39-404
(V2808)