Troubleshooting by Indication on the Remote Controller ESIE09-08B
174 Troubleshooting
3.33 “JA ” Outdoor Unit: Malfunction of High Pressure Sensor
Remote Control
Display
JA
Applicable
Models
ER*Q 011~016*
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 PC board
Troubleshooting
1: Voltage measurement point
2: Refer to “Pressure Sensor”, pressure / voltage characteristics table on P242.
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
(V2806)
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).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace indoor unit PC board
(A1P).
YES
YES
The high
pressure sensor is
connected to X17A of
indoor unit PC
board (A1P).
Indoor unit PC board A4P
+5V
X17A
Red
Black
White
GND
*2 Measure DC voltage here.
High pressure sensor
4
3
2
1
(V2807)
Microcomputer
A/D input
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