Troubleshooting - Daikin FCQ18PVJU Service Manual

SiUS28-902_a

Troubleshooting

∗1: Voltage measurement point
∗2: Refer to Pressure Sensor, Pressure / Voltage Characteristics table on P.168.
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
The high
pressure sensor is
connected to X17A of
outdoor unit P.C.B.
(A1P).
YES
The
relationship
between the *1
VH and high pressure
is normal (see *2) when
voltage is measured between
X17A pins (1) and (3) of
outdoor unit P.C.B.
(A1P)
(see *1).
NO
Troubleshooting by Indication on the Remote Controller
NO
YES
Connect the high pressure sensor
and turn on again.
Replace the outdoor unit P.C.B.
(A1P).
Replace the high pressure sensor.
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