Outdoor Unit: Malfunction Of Discharge Pipe Pressure Sensor - Daikin VRV R-407C PLUS Series Service Manual

SiE 00-07

3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor

JA
Remote Controller
Display
Supposed Causes
Troubleshooting
∗1: Voltage measurement point
∗2: Refer to pressure sensor, pressure / voltage characteristics table on P204.
Troubleshooting R-407C PLUS Series
Defect of high pressure sensor system
Connection of low pressure sensor with wrong connection.
Defect of outdoor unit PC board.
The high
pressure sensor is
connected to X22A (red) 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
X22A pins (1) and (3) of
outdoor unit PC
board (A1P)
(see ∗1).
NO
NO
YES
Troubleshooting
Connect the high pressure sensor and
turn on again.
Replace outdoor unit PC board A1P.
Replace the high pressure sensor.
(VF049)
145