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62
Troubleshooting and Test Functions
Pressure Below Lower Limit
Pressure Below Lower Limit
The system pressure has fallen below the lower pressure limit.
Probable Causes • Lower pressure limit set too high.
• Air bubbles in the mobile phase.
• Leak.
• Defective damper.
• Defective LPM board.
Suggested Actions ❏ Ensure the lower pressure limit is set to a value suitable for the analysis.
❏ Ensure solvents are degassed. Purge the quaternary pump.
❏ Ensure solvent inlet filters are not blocked.
❏ Inspect the pump head, capillaries and fittings for signs of a leak.
❏ Purge the quaternary pump. Run a pressure test to determine whether the
seals or other pump components are defective.
❏ Exchange the damper.
❏ Exchange the LPM board.
- Agilent 1100 Series 1
- Quaternary Pump 1
- Reference Manual 1
- Contents 10
- Radio Interference 264 11
- Sound Emission 264 11
- Solvent Information 265 11
- 1 Installing the Pump 13
- Site Requirements 14
- Bench Space 15
- Environment 15
- °C (41–131 °F) 16
- °C (-4–158 °F) 16
- °C (77–104 °F) 16
- Unpacking the Quaternary Pump 17
- ESD: Electrostatic Discharge 18
- Power Switch 22
- Serial number 22
- Installing the Pump 27
- 2 Optimizing Performance 31
- Optimizing Performance 33
- Procedure” on page 112) 33
- Degasser 36
- Gradient Valve (MCGV) 37
- When to Use Alternative Seals 39
- Optimize the Compressibility 40
- Compensation Setting 40
- 3 Troubleshooting and 43
- Test Functions 43
- Troubleshooting and Test 44
- Functions 44
- Status Indicators 45
- Power Supply Indicator 46
- Pump Status Indicator 46
- Error Messages 47
- Timeout 48
- Shut-Down 49
- Remote Timeout 50
- Synchronization Lost 51
- Leak Sensor Open 53
- Leak Sensor Short 54
- Compensation Sensor Open 55
- Compensation Sensor Short 56
- Fan Failed 57
- Open Cover 58
- Restart Without Cover 59
- Zero Solvent Counter 60
- Pressure Above Upper Limit 61
- Pressure Below Lower Limit 62
- Pressure Signal Missing 63
- Missing Pressure Reading 64
- Pump Configuration 65
- Valve Fuse 66
- Inlet-Valve Fuse 67
- Valve Failed 68
- Motor-Drive Power 69
- Encoder Missing 70
- Inlet-Valve Missing 71
- Temperature Out of Range 72
- Temperature Limit Exceeded 73
- Servo Restart Failed 74
- Pump Head Missing 75
- Index Limit 76
- Index Adjustment 77
- Index Missing 78
- Stroke Length 79
- Initialization Failed 80
- Wait Timeout 81
- Pressure Test 82
- Positioning the blank nut 83
- Running the Pressure Test 84
- Evaluating the Results 86
- Leak Test 88
- Running the Leak Test 90
- All plateaus negative 94
- Ramp 3 does not reach limit 95
- 4 Repairing the Pump 97
- Cleaning the Quaternary Pump 99
- Using the ESD Strap 100
- Overview 101
- Simple Repair Procedures 102
- Valve cartridge 104
- Valve body 104
- Repairing the Pump 105
- Gold seal 106
- Plastic cap 106
- Purge Valve 108
- Purge valve 109
- Pump outlet capillary 109
- Waste tube 109
- Head Assembly 110
- Wear-in Procedure 112
- Seal Wear-in Procedure 113
- Exchanging the Plungers 115
- Pump head screws 116
- Pump head 116
- Lock screw 116
- Exchanging the Wash Seals 119
- Insert tool 120
- Support ring 120
- Plunger housing 121
- Balls of spindle drive 122
- Metering drive 122
- Pumphead screws 122
- Valve (MCGV) 123
- BCD (Interface) board 126
- Exchanging Internal Parts 127
- Clip fastener (1) 128
- Light light switch 130
- Top foam cover 130
- Foam lever 130
- Board (LPM Board) 131
- Screws and Nut 132
- Analog output 132
- Board recessBoard recess 132
- Entering the Type Command 134
- Entering the Serial Number 135
- Exchanging the Damper 138
- Reconnect 140
- Exchanging the Fan 141
- Figure 22 Exchanging the Fan 142
- Exchanging the Pump Drive 143
- Exchanging the Power Supply 147
- Power supply screws 148
- Light pipe 149
- Exchanging the Leak Sensor 152
- Assembling the Main Cover 155
- Light switch 156
- Holding 157
- Leak funnel 158
- Waste tube holder 158
- 5 Parts and Materials 159
- Overview of Main Assemblies 160
- Parts and Materials 161
- Control Module (B-version) 163
- Solvent Cabinet 164
- Bottle Head Assembly 165
- Hydraulic Path 166
- Cover Parts 167
- Sheet Metal Kit 168
- Foam Parts 169
- Power and Status Light Pipes 170
- Leak Parts 171
- Pump Head Assembly 172
- Figure 35 Pump Head Assembly 173
- Outlet Ball Valve Assembly 176
- Purge Valve Assembly 177
- Active Inlet Valve Assembly 178
- Accessory Kit G1311-68705 179
- Reorder number (pack of 3) 180
- Reorder number (pack of 10) 180
- Cable Overview 181
- Analog Cables 183
- Agilent 1100 to BNC Connector 184
- Remote Cables 185
- BCD Cables 190
- Auxiliary Cable 192
- CAN Cable 192
- External Contact Cable 193
- RS-232 Cable Kit 194
- LAN Cables 195
- 6 Introduction to the 197
- Quaternary Pump 197
- How does the Pump Work? 200
- Electrical Connections 204
- Instrument Layout 206
- EMF Counters 207
- Using the EMF Counters 208
- The Electronics 209
- Firmware Description 214
- Firmware Updates 215
- Optional Interface Boards 216
- LAN Board 217
- Analog Signal Output 219
- GPIB Interface 219
- CAN Interface 219
- APG Remote Interface 220
- Instrument 222
- GPIB Default Addresses 224
- Forced Cold-Start Settings 226
- Stay Resident Settings 226
- Mode Select12345678 227
- TEST/BOOT11001000 227
- 7 Control Module Screens 231
- Diagnostics and Tests 251
- 8 Specifications 253
- Performance Specifications 254
- Specifications 255
- Warranty Statement 257
- Safety Information 260
- Safety Symbols 261
- Lithium Batteries Information 263
- Radio Interference 264
- Sound Emission 264
- Solvent Information 265
- In This Book 272
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