SSI America 90-2581 REV B manual Quick Guide to Problem Solving, You Notice, This May Mean

Page 36
6.PROBLEM SOLVING

6.PROBLEM SOLVING

Quick Guide to Problem Solving

 

You Notice

This May Mean

 

Possible Cause

1.

Uneven pressure

1.

Bubble in

1.

Solvent not properly

 

trace.

 

check valve.

 

degassed.

2.

Pressure drops.

2.

Leaks in

2.

Fittings are not tight.

3. No flow out the

 

system.

3.

Mobile phase not properly

 

outlet check valve.

3.

Dirty check

 

filtered.

 

 

 

valve.

4.

Particles from worn piston

 

 

4.

Bad check

 

seal caught in check valve.

 

 

 

valve.

5.

Plugged inlet filter.

1.

Uneven pressure

1.

Leaks in

1.

Fittings not tight.

 

trace.

 

system.

2.

Long usage time since last

2.

Pressure drops.

2.

The piston

 

seal / diaphragm change.

3.

Fluid between the

 

seal or

3.

Salt deposits on seal or

 

pump head and the

 

diaphragm is

 

diaphragm (especially if

 

retainer.

 

worn.

 

buffered aqueous mobile

 

 

 

 

 

phases are used).

Pump makes a loud

Piston carrier is

1.

Cap nut screws on the pump

clanging or slapping

catching in

 

head are loose.

noise (intermittent

piston guide.

2.

Seal(s) are worn.

contact with cam).

 

 

3.

Piston guide is worn

No power when pump

Blown fuses in

1.

Power surge.

turned ON.

the power entry

2.

Internal short.

 

 

module.

 

 

Blue dye in mobile

Pulse damper

Sudden pressure drop when

phase.

diaphragm has

purging system.

 

 

burst.

 

 

Pump runs for 50

Lower pressure

1.

Mobile phase is not properly

pump strokes, then

limit is

 

filtered.

shuts down.

activating.

2.

Particles from worn seal

 

 

 

 

 

trapped in the system (e.g.,

 

 

 

 

 

tubing, filters, injection valve,

 

 

 

 

 

column inlet).

1.

Pump shuts down

Clog in fluid

 

 

 

after run is called

system.

 

 

 

even with no

 

 

 

 

 

column connected.

 

 

 

 

2.Pump runs to maximum pressure and shuts down.

No power when pump

Blown fuses in

1.

Power surge.

turned ON. Fan does

the power entry

2.

Internal short.

not run.

module.

 

 

Front panel appears

Blown fuse on

1.

Power surge.

OK but pump motor

the motor power

2.

Internal short.

does not run.

circuit board.

 

 

PEEK fittings or

You cannot

1.

Film of fluid between

components leak.

force PEEK

 

surfaces.

 

parts with

2.

Salt crystals between

 

interference to

 

surfaces.

 

seal by brute

3.

Scratches in mating surfaces.

 

force tightening.

 

 

You Should

1.Check to be certain that mobile phase is properly degassed.

2.Check connections for leaks by tightening fittings.

3.Prime the system directly from the outlet check valve.

4.Clean or replace the check valves. See Section 5.4.

5.Clean or replace inlet filter. See Section 5.1.1.

1.Check all connections for leaks.

2.Replace piston seal & diaphragm. See Sections 5.2 and 5.3.

3.Check the piston for salt deposits. Clean as necessary. See Section 5.2.4.

1.Check cap nut screws on pump head. Tighten if necessary.

2.Replace seals.

3.Replace piston guide and seals. See Sections 5.2 and 5.3.

1.Replace only with the appropriate fuses (1A for 100/110 Vac or 1/2A for 220/240 Vac).

2.Contact service technician if problem persists.

Replace pulse damper. See Section 5.5.

1.Check to be certain the low pressure limit is set to 0 psi.

2.Only increase the low pressure limit after the pump attains operating pressure.

3.Contact service technician.

1.Remove and clean both the inlet and bulkhead filters. See Section 5.2.

2.If the problem persists, remove tubing from system one piece at a time until you find the clogged piece. Most clogs occur outside the pump itself.

1.Replace only with the appropriate fuses (1A for 100-120 Vac or 1/2A for 220-240 Vac).

2.Contact service technician if problem persists.

1.Replace only with the appropriate fuse .

2.Contact service technician if problem persists.

1.Clean and dry mating surfaces.

2.If scratched, replace defective part.

7-17

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Contents Binary Solvent Delivery Module Operators ManualPage 1.INTRODUCTION 1.1.1 Pump Features fFast & easy setup1.1.2 Wetted Pump Materials 1.1.3 Self-FlushingPump HeadMicroprocessor advanced control 1.1.4 Self-Flushand Seal Life It is recommended that the Self Flush feature be used to improve seal life in a number of applications. In particular, as stated above if pumping Buffers, Acids/Bases or any inorganic solution near saturation, the pump should utilize the Self Flush feature. With every piston stroke, an extremely thin film of solution is pulled back past the seal. If this zone is dry without use of Self Flush, then crystals will form with continuous operation, which will ultimately damage the sealFlow Rates 2.INSTALLATION 2.1Unpacking and Inspection2.2Location/Environment 2.3Fluid Connections & PrimingSELF-FLUSH PUMPConnect wash solution inlet and outlet tubing opaque to the flush housing as shown2.5.1 Solvent Out-gassingand Sparging 2.4Electrical Connection2.5Solvent Preparation 2.6.1Mobile Phase Reservoirs 2.5.2 Cavitation2.5.3 Filtration 2.5.4 Initial system pressurization Daily2.6.2 Self-FlushSolution 2.6.3 Inlet Tubing and Filters2.6.4 Priming the Pump and the Flushing Lines 2.6.6 Long Term Pressure Calibration Accuracy2.7.1Isopropanol Flush 2.7.2 Packaging for Shipping2.7Preparation for Storage or Shipping 3.OPERATION 3.1.1Control PanelNon-volatileMemory Reset If the pump is operating erratically, there is the possibility that the memory has been corrupted. To reset the memory and restore the pump to its default parameters, press and hold the UP-ARROWbutton when the power is switched on. Release the button when the display reads rES. The parameters stored in non-volatilememory, i.e., the flowrate, the pressure compensation, the voltage/frequency select, the lower pressure limit, and the upper pressure limit will be set to the factory default values. The head type setting is the only parameter not changed by the non-volatilememory reset function. If the firmware is upgraded to a newer version, a non- volatile memory reset will automatically occur the first time the power is switched on 3.6Symbols 3.5Rear Panel Remote Input4.THEORY OF OPERATION 4.1.1Liquid System Flow Path4.1.2 Pump Cycle 4.1.3 Pulse Damping4.2.2 DC Power Supply 4.2.1 Microprocessor Control4.2.3 Remote Interfacing 4.2.4 Motor Stall DetectorPage 5.MAINTENANCE 5.1.1 Inlet Filters5.2.1Removing a Pump Head 5.1Filter Replacement3.Remove the inlet line from the inlet check valve OUTLET FLUSHING CHECK VALVE OUTLET FLUSHING 5.2.2 Cleaning the Pump Head Assembly 1.Inspect the piston seal cavity in the pump head. Remove any foreign material using a cotton swab, or equivalent, and avoid scratching the sealing surfaces. Repeat for the self-flushhousing. Be sure no fibers from the cleaning swab remain in the components3.If the check valves have been removed, tighten the check valves on stainless steel pumps to 75 inch-poundsor enough to seal at maximum pressure. Do not exceed maximum torque. For Bioclean PEEK pumps, tighten each check valve firmly by hand. Do not go ¼ turn past finger tight 5.2.3 Replacing Piston Seals Lower than normal pressure, pressure variations, and leaks in the pumping system can all indicate possible problems with the piston seal. Depending on the fluid or mobile phase used, piston seal replacement is often necessary after 1000 hours of running time1.Remove the pump head as described in Section 5.2.1. Use caution so as not to damage the sapphire piston 5.2.4 Changing the Piston 5.Condition the new seal as described in Section5.2.5Replacing the Pump Head 5.3Conditioning New Seals5.5.1Removing the Pulse Damper 5.5.2 Pulse Damper Refurbishing5.4Check Valve Cleaning and Replacement 5.5Pulse Damper Replacement5.5.3 Pulse Damper Installation 5.6Cleaning the Pump5.8Other Pump Maintenance 5.7Lubrication7-14 5.9Fuse Replacement 1.Unplug the unit 2.Remove the cover 6.PROBLEM SOLVING Quick Guide to Problem SolvingYou Notice This May Mean7.LIST OF REPLACEMENT PARTS 880201 Seal Kit, Aqueous, 5mL APPENDIX A A.1.1 Hardware ImplementationPart Description Part NumberCommand Interpreter A.1.3“/” character Page A.2.1 Pressure Fault and Motor Stall Fault Output A4-pinterminal board connector and a 10-pinterminal board connector are provided on the back panel. Any device capable of providing the proper run/stop logic level, flowrate control frequency, or flowrate control voltage can be used as a remote controlling device for pump operation via this connection. The terminal board connectors can be removed for ease of connecting wires, if desired, by pulling firmly rearward and should be reinserted firmly afterwardA.2.2 General Information on Inputs the EVENT 1 terminal and the EVENT 2 and EVENT 3 terminals is affected. EVENT 2 is Normally Closed connected to EVENT 1 until a fault occurs and then opens. EVENT 3 is Normally Open not connected to EVENT 1 until a fault occurs and then closesA.2.4 Run and Stop Inputs The PUMP-RUN, PUMP-STOP,and ENABLE IN inputs operate from an internal 5 VDC source and each one draws approximately 0.008 amps when connected to COM. To activate either the PUMP- RUN, PUMP-STOP,or ENABLE IN input connect it to COM. Any device capable of switching 0.008 amps can be connected between the PUMP-RUN, PUMP-STOP,or ENABLE IN input and COM, such as: a switch contact, a relay contact, an open collector output, an open drain output, or any output with a high logic level output of 3.8 to 6.0 volts and a low logic level output of 0.0 to 0.5 volts. A switch contact or a relay contact is preferred since this type of connection will provide isolation between the pump and the controlling device. The COM terminal is internally connected to the pumps chassis ground and should be connected to the controlling devices ground or zero volt terminal when the controlling device has an open collector output, an open drain output, or any output with logic level outputA.2.4 Enable Input When activated ENABLE IN is at a low logic level, the ENABLE IN input disables flowrate control on the front panel and enables flowrate control on the back panelAPPENDIX B EZ GRIP FITTING GUIDEScientific Systems Inc Warranty Statement A-10
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