Ja" Outdoor Unit: Malfunction Of High Pressure Sensor - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.32 "JA " Outdoor Unit: Malfunction of High Pressure Sensor
JA
Remote Control
Display
Applicable
ER*Q 011~016*
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 P232.
Troubleshooting
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 connecting or disconnecting connector,
otherwise parts may be damaged.
Caution
The high
pressure sensor is
connected to X17A of
indoor unit PC
board (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
indoor unit PC board
(A1P) (see *1).
NO
Indoor unit PC board A4P
GND
Microcomputer
A/D input
*2 Measure DC voltage here.
Troubleshooting by Indication on the Remote Controller
NO
YES
+5V
Connect the high pressure sensor
and turn on again.
Replace indoor unit PC board
(A1P).
Replace the high pressure sensor.
X17A
Red
4
Black
3
2
White
1
(V2807)
(V2806)
171