Filter
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Note) Pressure control valve is used.
13. TROUBLESHOOTING
Caution
• When trouble cannot be remedied even after following the instruction manual, contact your dealer or
Fuji's service station (serivice engineer). Do not disassemble the device, as it results in electric shocks
or injury.
Trouble
Decrease of sample
gas flow rate
Increase of bubbling
flow rate
Rise of sample gas
flow (Note)
Indicated value is
abnormal.
Check item
Check if filter element is clogged.
Check if aspirator is working normally.
Check for abnormal sound or vibration.
Check if cooler is working normally,
check cooling temperature and check for
clogging of flow path.
Water decreases in lower chamber.
Check for gas leakage in piping after
aspirator or at joints.
Check for accumulation of drainage or
dust in flowmeter. Check adjustment of
needle valve.
Check for bent or clogged piping.
Check for capillary.
Check for deviated joint.
Pressure control valve is clogged.
Check for gas leakage in parts before
aspirator such as secondary coarse filter
holder, piping, joints, etc.
Check if aspirator is normally operating
and sample gas is flowing at set value.
Check if water level is normal.
Check if air is aspirated.
Check for accumulation of drainage in
piping.
Check if SUS pipe is used (for SO
2
analyzer).
Remedy
Clean or replace element.
Clean or replace.
Retighten screws or replace
aspirator.
Clean or replace.
Inject water and check the
capillary (bypass).
Retighten or replace parts.
Clean the flowmeter.
Adjust needle valve.
Replace.
Clean or replace.
Connect properly.
Disassemble and clean.
Retighten or replace parts.
Clean aspirator or replace
parts such as diaphragm or
value
Adjust sample gas flow.
Supply water.
Check primary filter.
Clean, and tilt piping so
drainage does not accumulate.
Change to teflon tube.
Probable location
Filter (primary, second-
ary, tertiary filters)
Diaphragm type aspirator
Electronic gas cooler
Conditioner
Gas leakage
Flowmeter
Piping, capillary
Bypass flow path
Piping
Pressure control valve
Gas leakage
Diaphragm
type aspiration
Conditioner
Dissolution of gas
Sampling pipe
13.1 Troubleshooting of instrument