YZ Systems NJEX 8300G, Руководство пользователя, Страница: 101 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 94
NJEX 8300 ver .092001 ATEX Rev.
SSSSS
ECTION ECTION ECTION ECTION ECTION
13: 13:
13: 13:
13: 8300 S 8300 S
8300 S 8300 S
8300 S
Y YY Y YSTEM STEM STEM STEM STEM
TTTTT
R RR R ROUBLESHOO OUBLESHOO OUBLESHOO OUBLESHOO OUBLESHOOTING TING TING TING TING
solenoid, remove it and re-connect it to the
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
displacement 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.