Penyelesaian Masalah Menggunakan Remote Kontrol
Service Checker
Connect the service checker to compare the “high pressure” value and the
actual measurement value by pressure sensor (2) by using the service
checker.
pressure has become high.
Penyelesaian
Masalah
Perhatian
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check for the points shown below.
(1) Is the stop valve open?
(2) Is the saklar tekanan tinggi connector properly
connected to the unit outdoor main PCB?
(3) Does the saklar tekanan tinggi have continuity?
Are the 3
NO
points above OK?
Rectify defective points,
if any.
YES
Does the
Berhenti akibat
kesalahan
"E3" recur?
YES
Is the
high pressure
NO
switch operating
value normal (i.e.,
4.0MPa)?
NO
YES
Are the
characteristics of the high
NO
pressure sensor normal?
(
1.)
YES
Check if
the “h igh pressure”
value and the actual
NO
measurement value by
pressure sensor are
the same.
Replace the sensor
tekanan tinggi.
Replace the unit
outdoor main PCB
(A1P).
YES
1.Make a comparison between the voltage of the pressure sensor and that read by the
pressure gauge.
CHECK 12
(As to the voltage of the pressure sensor, make measurement of voltage at the connector,
and then convert it to pressure.)
2.Make measurement of voltage of the pressure sensor.
+5V
Connec tor for sens or
tekanan ti nggi (Red)
(4) Red
Micro-computer
A/D input
Make measurement of DC
voltage between these wires.
CHECK 1 Refer to P.133
CHECK 12 Refer to P.138
(3)
(2)
(1)
Black
White
(1) Mount a pressure gauge on the high pressure
service port.
(2) Reset the operation using the remote
controller, and then restart the operation.
·
The high pressure sensor is normal, and the pressure detected with the unit outdoor main PCB are also normal.
·
The high pressure or field piping pressure has really become high.
CHECK 1
Remove the causes by which the high pressure or field piping
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