| Problem | Cause | Solution |
| There is leak | T-joint is loose | Tighten t-joint |
| Other joints are loose | Tighten joints | |
| Sample heating tube is broken | Replace sample heating tube | |
| Sample inlet nut is loose | Tighten sample inlet nut | |
| Septum is faulty | Replace to new septum | |
| Filter located before flow sensor is clogged | Replace to new filter | |
| Flow sensor is broken | Replace flow sensor | |
| Flow sensor calibration does not work fine | Execute flow sensor calibration | |
| Sensitivity drop | Mercury standard solution is faulty | Recreate mercury standard solution |
| There is leak | Fix the leak | |
| Sample heating tube is faulty | Replace sample heating tube | |
| Joints and cell are soiled | Replace or wash Joints and cell | |
| Method is not proper | Change method or reduce sample volume | |
| Mercury lamp is faulty | Replace to new mercury lamp | |
| V6 valve has leak | Replae to new V6 valve | |
| PMT is faulty | Replace to new PMT | |
| AFS board is faulty | Replace to new AFS board | |
| Flow error | Ar and/or Air cylinder gone or valve close | Replace cylinder/open valve |
| Clogged by sample heating tube | Replace sample heating tube | |
| Mass flow controller is broken | Replace mass flow controller | |
| Strange peak shape / no peak | V1 valve has leak | Replace to new V1 valve |
| V3 valve has leak | Replace to new V3 valve | |
| Maximum
H5 temperature is low (Thermocouple position is not good or SSR/switching power supply is broken) |
Adjust thermocouple position Replace SSR/switching power supply |
|
| H5 does not heat up (H5 coil or thermocouple is broken) |
Replace H5 heater coil or thermocouple | |
| Mercury collector tube is faulty | Replace mercury collector tube | |
| High blank | Sample heating tube is contaminated | Replace to new sample heating tube |
| Condensate trap is contaminated | Replace or wash condensate trap | |
| Septum is contaminated | Replace septum | |
| Joints and cell are contaminated | Replace or wash Joints and cell | |
| Wash solution is contaminated | Replace to new wash solution | |
| Syringe is contaminated | Replace to new syringe | |