Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor - Daikin VRV III-S RXYMQ6PV4A Service Manual

Troubleshooting by Indication on the Remote Controller
3.29 "JC" Outdoor Unit:
JC
Remote
Controller
Display
Applicable RXYMQ6P
Models
Method of Malfunction is detected from pressure detected by low pressure sensor.
Malfunction
Detection
Malfunction When the low 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 P231.
162
Malfunction of Low Pressure Sensor
Defect of low pressure sensor
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
connected to X18A (blue)
of outdoor unit PC
board (A1P).
YES
The
relationship
between the ∗1
VL and low pressure is
normal (see ∗2) when voltage
is measured between X18A pins
(2) and (3) of outdoor unit
PC board (A1P)
(see ∗1).
NO
NO
YES
SiME34-608
Connect low pressure sensor
property and restart system.
Replace outdoor unit PC board
(A1P).
Replace the low pressure sensor.
Troubleshooting
(V2808)