Troubleshooting by Indication on the Remote Controller
SiBE37-701_B
315
Troubleshooting
Troubleshooting
∗
2: Voltage measurement point
∗
2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P452.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Are the characteristics of the
high pressure sensor normal?
(Make a comparison between
the voltage characteristics (
∗
2)
and the gauge pressure.)
NO
Replace the high pressure sensor.
Confirm which high pressure
sensor is abnormal using
outdoor unit "monitor mode".
(Refer to P.255~P.256)
1. Set the high pressure gauge
upright.
2. Connect the checker for
VRV to the gauge.
If the PCB pressure detection
normal? (Make a comparison
between the checker pressure
data and the voltage
characteristics (
∗
2).)
Reset the operation, and then
restart the outdoor unit.
Are the
characteristics of
the high pressure
sensor normal?
Replace the main PCB.
Replace the high pressure sensor.
Replace the main PCB.
NO
NO
YES
YES
YES
∗
1: Pressure sensor subject to malfunction code
Malfunction code Pressure sensor subject to malfunction code Electric symbol
JA
High pressure sensor
S1NPH
Outdoor unit PCB (A1P)
+5V
GND
Micro-computer
A/D input
∗
2 Measure DC voltage here.
X32A
(4)
(3)
(2)
(1)
Red
Black
White
High
pr
essu
re
sen
s
or
Summary of Contents for REYQ8-48PY1B
Page 1: ...Service Manual REYQ8 48PY1B R 410A Heat Recovery 50Hz SiBE37 701_B ...
Page 456: ...Piping Installation Point SiBE37 701_B 445 Appendix ...
Page 460: ...Example of connection SiBE37 701_B 449 Appendix ...
Page 476: ...Revision History Date News No Contents 2010 9 10 M 10011 Correction of service manual ...