Daikin D-Series User Manual

Troubleshooting for Outdoor Unit Si18-525B
378 Troubleshooting
7.13 Outdoor Unit: Malfunction of High Pressure Sensor
Remote
Controller
Display
JA
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Decision
Conditions
When the high pressure sensor is short circuit or open circuit.
Supposed
Causes

Defect of high pressure sensor

Connection of low pressure sensor with wrong connection.

Defect of outdoor unit PCB.
Troubleshooting
∗
1: Voltage measurement point
∗
2: Refer to pressure sensor, pressure / voltage characteristics table on P400.
(Q0432)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The
relationship
between the ∗1
VH and high pressure
is normal (see ∗2) when
voltage is measured between
X46A pins (1) and (3) of
outdoor unit PCB
(A1P)
(see ∗1).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace outdoor unit PCB A1P.
YES
YES
The high
pressure sensor is
connected to X46A of
outdoor unit PCB
(A1P).

Daikin D-Series Specifications

General

HSPF Rating	Up to 10.0
Cooling Capacity	9, 000 - 36, 000 BTU/h
Heating Capacity	9, 000 - 36, 000 BTU/h
Energy Efficiency Ratio (EER)	Up to 12.5
Sound Level	19 - 50 dB (Indoor), 49 - 60 dB (Outdoor)
Noise Level	19 - 50 dB (Indoor), 49 - 60 dB (Outdoor)
Power Supply	208/230V, 1-phase, 60Hz