Daikin FCQ18PVJU Service Manual page 127

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 low
pressure sensor is
NO
connected to X18A (blue)
of outdoor unit P.C.B.
(A1P).
YES
The
relationship
between the *1
VL and low pressure is
normal (see *2) when voltage
is measured between X18A pins
(2) and (3) of outdoor unit
P.C.B. (A1P)
(see *1).
NO
Troubleshooting by Indication on the Remote Controller
YES
Connect the low pressure sensor
property and restart system.
Replace the outdoor unit P.C.B.
(A1P).
Replace the low pressure sensor.
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