DH PNEUDRI DX Instrucciones Para La Instalacion, El Funcionamiento Y El Mantenimiento página 38

G) Fault Finding
PROBLEM VISUAL INDICATION
Poor Moisture content
Dewpoint. indicator (amber).
Hygrometer (if fitted).
High Pressure gauges.
pressure
drop.
Differential pressure
indicator in red.
Failure to No depressurisation.
purge.
Loss of dewpoint.
Excessive Cables overheating or
Power overloading
Consumption and tripping.
(Heat
Regenerative
models only).
PROBABLE CHECK
CAUSE
Inlet temperature Check inlet
too high. temperature.
Contaminated Check desiccant.
desiccant.
As above. Check fuses and
calibration of
hygrometer.
Excessive outlet Check outlet flow.
flow.
Blocked filter. Filter element.
No signal to Check signal line.
exhaust valve.
Purge air orifice Check for purge
closed. air.
Exhaust silencer Check condition
blocked. of silencer.
Excessive purge Check purge flow
flow. with rotometer.
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REMEDY
Reduce inlet
temperature.
Replace desiccant
and eliminate
source of
contamination.
Replace fuses,
re-calibrate and
if necessary
replace.
Regulate.
Replace filter.
Replace signal
line if necessary.
Reset purge air
to suit air
demand.
Replace if
blocked.
Regulate purge
flow accordingly.