Ja" Outdoor Unit: Malfunction Of High Pressure Sensor - Daikin VRV III RXYQ5-54PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.30 "JA" Outdoor Unit:
JA
Remote
Controller
Display
Applicable RXYQ5P~54P
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 P367.
258
Malfunction of High Pressure Sensor
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 X32A 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
X32A pins (1) and (3) of
outdoor unit PC
board (A1P)
(see ∗1).
NO
NO
YES
Si34-601A
Connect the high pressure sensor
and turn on again.
Replace outdoor unit PC board
(A1P).
Replace the high pressure sensor.
Troubleshooting
(V2806)