Symptom

Possible cause/remedy

Not reaching set flow rate

• Filter clogged – Change filter
• Scrubber restriction – Check Scrubber
• Exhaust restriction – Check Exhaust
• Flow path restriction – Contact service engineer
• Pump malfunction – Contact service engineer
• Flow sensor malfunction – contact service engineer

System does not boot

• Check mains and fuse
• Check hard on/off switch at back of unit
• Other – Contact service engineer

Sensor or filter temperature does not reach set-point

• Contact service engineer

Humidity not reaching desired level

• Faulty humidity sensor – contact service engineer
• Incorrect scrubber/scrubber consumed – replace/refill scrubber
• External air supply is wet.

Contamination

• Dirty sampling interface, pipe-work – Clean pipework
• Scrubber may need its contents changing
• Leave system running with clean, dry air and all heaters on for 1 day
• Particulate filter is contaminated and needs replacing

USB accessory not detected

• Faulty USB, software did not detect device – try second USB port

Software freezes

• Reboot by pressing front on/off button twice

NI error message

• Reboot, if problem persists please contact service engineer with error message code

No background ion peak

• Check Scrubber is properly mounted
• Check for a leak in the flow path