Daikin VRV III REYQ10PY1B, Руководство по обслуживанию

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Troubleshooting by Indication on the Remote Controller SiBE37-701
274 Troubleshooting
Troubleshooting
NO
YES
YES
YES
NO
NO
YES
NO
Check for the points shown below.
Is the stop valve open?
Is the HPS connector properly connected to the
main PC board?
Does the high pressure switch have continuity?
Are the
three points above
OK?
Rectify defective points, if any.
NO
YES
Check if the
“high pressure” value and
the actual measurement value by
pressure sensor are
the same.
Replace main PC board ( A1P).
Mount a pressure gauge on the high-pressure
service port.
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.
· 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 5
Referring to information on P372, remove the causes by
which the high pressure has become high.
∗
1: Make a comparison between the voltage of the pressure sensor 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 P439.)
∗
2: Make measurement of voltage of the pressure sensor.
+5V
(4)
(3)
(2)
(1)
Connector for high
pressure sensor (Red)
High
pressure
sensor
Micro controller
A/D input
Make measurement of DC
voltage between these wires.
Red
Black
White
Connect the service checker to compare the “high pressure” value and the
actual measurement value by pressure sensor (Refer to
∗
1) by using the
service checker.
Service Checker
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.