Ja" Outdoor Unit: Malfunction Of High Pressure Sensor - Daikin ERQ Service Manual

Troubleshooting by Indication on the Remote Controller
JA
3.29 " " Outdoor Unit: Malfunction of High Pressure Sensor
JA
Remote
Controller
Display
Applicable
ERQ 125 ~ 200 A7V1
Models
Method of Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Detection
Malfunction
When the high pressure sensor is short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗1: Voltage measurement point
∗2: Refer to "Pressure Sensor", pressure / voltage characteristics table on P234.
198
Defect of high pressure sensor
Connection of low pressure sensor with wrong connection.
Defect of outdoor unit PC board.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
The high
pressure sensor is
NO
connected to X17A of
outdoor unit PC
board (A1P).
YES
The
relationship
between the ∗1
VH and high pressure
is normal (see ∗2) when
YES
voltage is measured between
X17A pins (1) and (3) of
outdoor unit PC
board (A1P)
(see ∗1).
NO
Connect the high pressure sensor
and turn on again.
Replace outdoor unit PC board
(A1P).
Replace the high pressure sensor.
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ESIE09-05
(V2806)
Troubleshooting