| Problem | Cause | Solution |
| There is leak | Joints are loose | Re-tighten all joints; fitting on T-joint and trap may need 1/4 turn with small wrench |
| Most Common Sources of Leaks | Sample heating tube is broken | Remove and Install new sample heating tube |
| Pressure regulator is broken | Replace pressure regulator | |
| Solenoid valve(V1-V3) is broken or dirty | Clean V3 Valve; Replace solenoid valve | |
| Foreign matter on inlet o-ring | Remove foreign matter or install new inlet O-ring |
|
| High or low flowcell has an internal leak | Disassemble, clean, and reinstall flowcells | |
Loose or broken connection between flowcells | Replace High flowcell | |
| Broken Z-Axis Nut prevents inlet from sealing | Remove and replace Z-axis nut | |
Sensitivity drop |
Mercury
standard solution is bad or wrong |
Remake mercury standard solution |
| There is leak | Run a leak check and Fix the leak | |
| Sample heating tube is faulty | Remove and Replace sample heating tube | |
| Wrong method selected in software | Change method | |
| Incomplete sample decomposition | Change method or reduce sample amount | |
| Sample interference (halogens) | Change method; reduce sample amount; use additives | |
| Residue on sample boat | Wash or replace sample boat | |
| Joints/cell are contaminated | Wash and/or replace all teflon joints | |
Broken H2 Heater | Check heater; replace heater and/or SSR if coil is good | |
| Flow error | Oxygen
cylinder is empty or valve closed |
Replace cylinder/open valve |
| Combustion tube is plugged or solidifyed | Remove and Replace sample heating tube | |
| Activated Carbon Filter is clogged | Replace activated carbon filter | |
| Mass flow controller is broken | Check and adjust or Replace mass flow controller | |
| Plugged Sample Fork (flow rate drop during dry step) |
Replace or clean boat handling poker | |
| Clogged up V3 Valve (flow rate drop during dry step) |
Clean and/or Replace the V3 and teflon tubing | |
| Strange peak shape / no peak | Affected by interference | Change method or reduce sample amount or use additive |
| Maximum H3 temperature is low
(Thermocouple position is not good or SSR/switching power supply is broken) |
Adjust thermocouple position Replace SSR/switching power supply |
|
| H3
does not heat up (H3 coil or thermocouple is broken) |
Replace H3 heater coil or thermocouple | |
| Mercury collector tube is faulty | Clean and/or Replace the mercury collector tube | |
| High blank | Sample heating tube is contaminated | Replace to new sample heating tube |
| Joints are contaminated | Replace or wash Joints and cell | |
| Boat sample fork is contaminated |
Replace or Clean boat sample fork |
|
| Sample boat is contaminated | Replace or wash sample boat | |
| Sample inlet is contaminated | Replace or clean sample inlet | |
| Dehumidifier bottle is contaminated | Replace or wash dehumidifier bottle |