Troubleshooting PACD011001C2
178 Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22
3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor
Remote Controller
Display
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Supposed Causes
„
Defect of high pressure sensor system
„
Connection of low 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.
(VF049)
The
relationship
between the
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).
Replace the high pressure sensor.
Connect the high pressure sensor and
turn on again.
NO
NO
Replace outdoor unit PC board A1P.
YES
YES
The high
pressure sensor is
connected to X22A (red) 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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