Daikin ERQ, Руководство по обслуживанию

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ESIE09-05 Troubleshooting by Indication on the Remote Controller
Troubleshooting 183
Troubleshooting
NO
YES
YES
YES
NO
NO
YES
NO
YES
NO
+5V
(4)
(3)
(2)
(1)
Check for the points shown below.
1
Is the stop valve open?
2
Is the HPS connector properly connected to the
main PC board?
3
Does the high pressure switch have continuity?
Are the
three points above
OK?
Rectify defective points, if any.
· Mount a pressure gauge on the high-pressure service port.
· Connect the Service Checker.
· Reset the operation using the remote controller,
and then restart the operation.
Does the stop
due to malfunction (E3)
recur?
Is the HPS
operating value normal
(i.e., 4.0MPa)?
Are the
characteristics of the high
pressure sensor normal?
(See *1.)
Replace the HPS.
Replace the high pressure sensor.
Is the
pressure detected with
the PC board normal?
(See *2.)
Replace the main PC board.
· The high pressure sensor is normal, and the pressure detected with the PC board is also normal.
· The high pressure has really become high.
CHECK 1
Refer to information on P.223, remove the causes by
which the high pressure has become high.
*1: Make a comparison between the voltage of the pressure sensor (*4) and that read by the
pressure gauge.
(As to the voltage of the pressure sensor, make measurement of voltage at the connector, and
then convert it to pressure according to information on “Pressure Sensor”.)
*2: Make a comparison between the high pressure value checked with the Service Checker and the
voltage of the pressure sensor (see *1).
*3: Make measurement of voltage of the pressure sensor.
Connector for high
pressure sensor (Red)
High
pressure
sensor
Micro controller
A/D input
Make measurement of DC voltage between these wires. (*4)
Red
Black
White
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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