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

Troubleshooting by Indication on the Remote Controller
3.33 "JA " Indoor Unit: Malfunction of High Pressure Sensor
JA
Remote Control
Display
Subcode 16
Applicable
All indoor units
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.
172
Defect of high pressure sensor
Connection of low pressure sensor with wrong connection
Defect of indoor unit PC board (A4P)
Be sure to turn off power switch before connecting or disconnecting
Caution
connector, otherwise parts may be damaged
The high
pressure sensor is
NO
connected to X17A of
indoor unit PC
board (A4P).
YES
NO
Indoor unit PC board A4P
GND
Microcomputer
A/D input
*2 Measure DC voltage here.
Bad wire connection
Value < 0.1 bar
over 60 seconds
YES Faulty sensor
Value > 43 bar
over 60 seconds
+5V
Connect the high pressure sensor
and turn on again.
Replace indoor unit PC board
(A4P).
Replace the high pressure sensor.
X17A
Red
4
3 Black
2
White
1
(V2807)
Troubleshooting
ESIE09-08
(V2806)