Outdoor Unit: Malfunction Of Suction Pipe Pressure Sensor - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
3.24 Outdoor Unit:
JC
Remote Controller
Display
„ Defect of low pressure sensor system
Supposed Causes
„ Connection of high pressure sensor with wrong connection.
„ Defect of outdoor unit PC board.
Troubleshooting
∗ 1: Voltage measurement point
∗ 2: Refer to pressure sensor, pressure/voltage characteristics table on P587.
Troubleshooting UM Combination "MA1R Series" Using R-407C
Malfunction of Suction Pipe Pressure Sensor
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 X21A (blue)
of outdoor unit PC
board (A1P).
YES
The
relationship
between the
VH and low pressure is
normal (see ∗2) when voltage
is measured between X21A pins
(2) and (3) of outdoor unit
PC board (A1P)
(see ∗1).
NO
NO
YES
Troubleshooting
Connect low pressure sensor property
and restart system.
Replace outdoor unit PC board A1P.
Replace the low pressure sensor.
(VF050)
521