YZ Systems NJEX 7300L, Инструкция и руководство по эксплуатации, Страница: 104 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
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NJEX 7300L ver.09042003
SSSSS
ECTION ECTION ECTION ECTION ECTION
13: 13:
13: 13:
13: 7300L S 7300L S
7300L S 7300L S
7300L S
Y YY Y YSTEM STEM STEM STEM STEM
TTTTT
R RR R ROUBLESHOO OUBLESHOO OUBLESHOO OUBLESHOO OUBLESHOOTING TING TING TING TING
pump solenoid. With the status key in the
run mode instruct the NJEX System to fill. If
the solenoid is good, you should get gas
from the solenoid. To stop it, place in the
NJEX System in standby mode and gas flow
should stop. If no gas flows the pump
solenoid is bad and should be replaced.
e. If the above test indicates the solenoid is
functioning, next determine if the signal is being
sent by the controller, or lost in the cabling and
connections. Open the termination enclosure
,enclosure door just below the N-300, and
connect your volt meter to TB-1 terminals 9 and
10, with 9 being the positive (yellow wire) and
10 being the negative (blue wire). Now, test fire
the pump with the test switch. A momentatry
voltage pulse, aproximately .2 seconds in
duration, should be observed. This will be a DC
voltage pulse not exceeding 12VDC. If the
pulse is at the termination panel next check the
polarity of connections of the wiring. The
terminal 9 should have a yellow wire attached
and, the terminal 10 should have a blue wire
attached. If the polarity is correct, on the
wiring, the cable assembly to the solenoid
should be replaced.
f. If no voltage is detected, contact the technical
service department at the factory.
g. With the actuation gas line reconnected to the
pump, test stroke the pump. Observe if there is
an audible pump stroke with the piston bottoming
out and returning to the top of the pump housing.
If an audible pump actuation is not present ,
remove the actuation cylinder and inspect for a
broken return spring, or a stuck / sticking plunger
assembly. Replace the spring if broken, clean
and relubricate the plunger assembly and
actuation cylinder. Make certain the seals are
not sticking to the plunger assembly.
h. Inspect the pump oil level and action during
actuation. The oil level should rise slightly
during an actuation of the pump, and the oil
level must be above the nipple connecting the
reservoir to the pump body. The oil should not
smell strongly of odorant and the oil color
should be red, not clear. If the oil appears
clear and / or smells strongly of odorant,
the pump diaphragm and seals need
service. If the pump is low on oil, or out of
oil, fill to the oil level reference mark inside
of the oil reservoir about half way down with
proper oil. If the pump was completely out
of oil, or if the level was below the top of the
nipple, the pump will need repeated stroking
to permit the trapped air to work out of the
oil reservoir. If possible, let the pump run
overnight with the reservoir cap removed. If
refilling with oil seems to bring the displace-
ment back, monitor for a while and observe
if the oil level drops again. If the pump
continues to use oil, service the seals and
diaphragm servicing.
6. Assure that the pump is properly primed by:
a. Placing the unit in stand by.
b. Closing valve V8 at the pipeline.
c. Open valve V3.
d. Test stroke the pump 15 - 20 strokes with the
Test key, then place back in standby.
e. Close valve V3 and open valve V8.
f. Place the controller in run mode.
g. Monitor the pump performance and observe if
pump actuation is occurring.
7. If problems persist, contact YZ technical service for
additional assistance.