PACD011001C2 Troubleshooting
Troubleshooting Urban Multi “MX1R, ME1R Series” Using R-407C 367
3.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor
Remote Controller
Display
JC
JCJC
JC
Supposed Causes
„
Defect of low pressure sensor system
„
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.
(VF050)
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).
Replace the low pressure sensor.
Connect low pressure sensor and
restart.
NO
NO
Replace outdoor unit PC board A1P.
YES
YES
The low
pressure sensor is
connected to X21A (blue)
of outdoor unit PC
board (A1P).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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