Table of Contents
5. Troubleshooting method of main parts of BC controller
(1) Pressure sensor
Troubleshooting flow chart for pressure sensor
Start
Check whether the pressure sensor or the con-
nectors of P1 and P3 are not disconnected, not
loose, or not connected wrongly.
OK?
NO
Operating at
the moment?
YES
With the self-diagnosis monitor, measure
· Outdoor high-pressure 63HS
· Outdoor low-pressure 63LS
· BC controller pressure P1 (liquid side) and
P3 (intermediate part)
Check whether the result is 63HS P1 P3 63LS.
OK?
YES
Stop the applied BC controller system.
(Compressor OFF)
10 minutes or longer after
the operation stops?
Check P1 and P3 with the self-diagnosis moni-
tor, and check that the detection pressure is
0.098MPa or more.
OK?
Check that the difference between each detect-
ed pressure is 0.098MPa or less.
OK?
YES
Both the board and the pressure sensor are normal.
Check whether the connection relation between
the refrigerant piping, between the outdoor unit
arrow
and the BC controller, and the trans-
mission line corresponds.
OK?
YES
Note1
Fix the fault.
Note2
Check whether the
connection relation
NO
between the refriger-
ant piping, between
the outdoor unit ar-
row
and the BC
controller, and the
transmission line
corresponds.
NO
OK?
YES
NO
NO
Is Pd P1
P3 Ps?
YES
NO
Fix the relation be-
tween the refriger-
ant piping and the
transmission line.
- 169 -
Fix the relation between the
NO
refrigerant piping and the
transmission line.
Check whether the connector of the ap-
plied pressure sensor is not faulty.
OK?
YES
NO
Remove the pressure sensor connector
from the board, and check the pressure.
Pressure
0MPa
YES
Short-circuit the connector pins between No.2
and 3 on the board, and check the pressure.
6MPa pressure or
6MPa pressure or
more is displayed.
more is displayed.
YES
Replace the pressure sensor, which de-
tects less than 6MPa pressure, with the
pressure sensor, which detects 6MPa or
more pressure, check the pressure, and
check whether the detected pressure is
displayed normally.
OK?
YES
Replace the pressure sensor.
Note3
NO
Note4
Restore contact
failure.
NO
NO
NO
Replace
the board.
Hide quick links:
Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric PURY-P200
Related Products for Mitsubishi Electric PURY-P200
- Mitsubishi Electric PURY-P216TSJMU-A
- Mitsubishi Electric PURY-P216TYSJMU-A
- Mitsubishi Electric PURY-P240TSJMU-A
- Mitsubishi Electric PURY-P264TSJMU-A
- Mitsubishi Electric PURY-P264TYSJMU-A
- Mitsubishi Electric CITY MULTI PURY-P288YSJMU-A
- Mitsubishi Electric CITY MULTI PURY-P264TSJMU-A-BS
- Mitsubishi Electric CITY MULTI PURY-P288TSJMU-A-BS