5.2 Troubleshooting guide
77
BF-190 Series OPERATION MANUAL
Ch.5
Water feeding
Suction
The image is not proper. An incompatible video system center is
being used.
Use a compatible video system center.
An incompatible light source is being
used.
Use a compatible light source.
Foreign objects such as detergent
remnants, hard water residue, finger
grease, dust, and lint are on the
electrical contacts on the endoscope
connector.
Wipe the electrical contacts on the
endoscope connector using clean
lint-free cloths moistened with 70%
ethyl or 70% isopropyl alcohol and
completely dry them as described in
Section 3.3, “Inspection of the
endoscope”. After drying them, connect
the endoscope to the light source and
confirm that a proper image is displayed
when twisting the endoscope connector
left and right.
Irregularity description Possible cause Solution
The fluid is leaking from the
biopsy valve.
The biopsy valve is attached incorrectly. Attach it correctly.
Close the valve’s cap (for MD-495).
The syringe is not inserted securely. Insert it securely.
The biopsy valve cannot be
attached.
An incorrect biopsy valve is used. Use a correct biopsy valve.
The biopsy valve is damaged. Replace it with a new one.
Irregularity description Possible cause Solution
The suction function is
absent or insufficient.
The biopsy valve is attached incorrectly. Attach it correctly.
Close the valve’s cap (for MD-495).
The biopsy valve is damaged. Replace it with a new one.
The suction pump is not set properly. Adjust the suction pump’s setting as
described in its instruction manual.
The suction valve is damaged. Replace it with a new one.
The suction valve is sticking. The suction valve is damaged. Replace it with a new one.
The suction valve does not
return to its original position.
The aspiration pressure is too high. Lower the aspiration pressure.
The suction valve cannot be
attached.
An incorrect suction valve is used. Use a correct suction valve.
The suction valve is damaged. Replace it with a new one.
Irregularity description Possible cause Solution
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