YZ Systems NJEX 7300L, Инструкция и руководство по эксплуатации, Страница: 98 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 88
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
should be 75 psi (5.17 Bar).
Verometer No-Fill Alarm
Troubleshooting Steps,
Continued
5. Verify that the status switch be in the run position.
If no pneumatic supply is received at the fill valve
when a fill is called for, test electrical supply to the fill
valve solenoid located on the left. With a volt meter
the current should read 12VDC at the fill valve
solenoid when a fill is requested. If voltage is
present when a fill is requested, but gas will not flow
to the fill valve, replace the solenoid.
a. If a volt meter is unavailable, you may test fire
the pump with the test switch to verify the other
solenoid and cable are active. To test, tempo-
rarily switch the solenoid cables. Now when the
test switch is activated, the fill valve solenoid
should send pneumatic supply gas to the
loosened connection at the fill valve for approxi-
mately .2 seconds each time the test switch is
activated. If this does occur there is some
problem with the fill signal getting to the fill
solenoid. However, if the solenoid still does not
send actuation gas to the fill valve the solenoid
is bad and should be replaced.
If the signal is not getting to the solenoid, test at
terminal strip TB-1, located inside the termination
enclosure just below the N-300 Controller, with a
volt meter at pins 7 positive (orange wire) and 8
negative (violet wire), for 12VDC when the fill is
requested from the N-300 controller. If the voltage
is present, check the wiring for proper polarity
connections. Verify that pin 7 has an orange wire,
and pin 8 a violet wire connected.
6. If an electrical signal is not present when a fill is
requested, check all cables for corrosion, moisture,
or damage and replace if any signs of the previous
mentioned problems are present and perform the
test again.
7. If an electrical signal is still not present contact YZ
Systems Technical Service.
Verometer Slow-Fill Alarm
Troubleshooting Steps
IMPOR IMPOR
IMPOR IMPOR
IMPORTTTTTANT NO ANT NO
ANT NO ANT NO
ANT NOTE: TE:
TE: TE:
TE:
Prior to troubleshooting a slow fill alarm, verify that the
Verometer is not in a full level position as the fill valve
commands can not be processed if the Verometer is full.
1. Inspect the actuation gas supply filter for possible
restriction, and replace as necessary.
2. Inspect the odorant filters for possible restriction and
replace as necessary.
3. Check tubing between bulk odorant storage tank
and enclosure for damage. If tubing is crimped,
bent or damaged by any form that could restrict
flow, replace the tubing. Verify that an adequate
flow of odorant is supplied to the fill valve.
4. Test for adequate fill valve pneumatic actuation
pressure. Place a guage at the tubing connection
located on top of the fill valve by disconnecting
tubing. During a fill, the valve actuation pressure
should be 75 psi (5.17 Bar).
5. Disassemble, clean, and rebuild fill valve assembly.
Verometer Leakage Alarm
Troubleshooting Steps
1. Inspect the system for any obvious leaks and repair
as necessary.
2. If the Leakage alarm occurs during purging of the
system or the packing of the lines with odorant on a
new system, a manual refill of the verometer will be
required and this will clear the alarm.
3. Verify that the pump displacement parameter
correctly matches the actual pump performance on
the system, and correct if necessary.
4. Verify the correct balance of pressures between the
pump actuation pressure and the pipeline pressure,
refer to figure 4, in the System Flow Schematic on
page 6, Section 2
for specific system pressures.