172-65254M-03 (A-COS-10) 27 Oct 2008
18
Troubleshooting
NEVER apply direct heat to the float. The float may explode due to
increased internal pressure, causing accidents leading to serious injury
or damage to property and equipment.
WARNING
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
This product is shipped after stringent checks and inspection and should perform its
intended function for a long period of time without failure. However, should there be
any problem encountered in the operation of the
COSPECT
, consult the
troubleshooting guide below.
Problems are classified as follows:
1. The secondary pressure does not increase.
2. The secondary pressure cannot be adjusted or increases abnormally.
3. Hunting (fluctuation of the secondary pressure) occurs.
4. Chattering (a heavy mechanical noise) occurs.
5. Air leaks from the air trap or condensate is not discharged.
6. Abnormal noises.
Major causes for the above problems are usage under non-specified conditions (out
of specification), insufficient pressure or flow rate, and clogs by dirt and scale.
To ensure performance for a long period of time, it is recommended that the
“Acceptable Operating Range”, “Correct Usage of the
COSPECT
Pressure
Reducing Valve” and “Adjustment” sections be reviewed
.
Troubleshooting Chart
Problem Symptom
Cause
Remedy
No air is being supplied
or the inlet valve is
closed
Check the valves and
piping
The secondary
pressure does
not rise
The pressure
does not increase
The entrance to the
screens or strainer is
clogged
Clean or blow down
The pilot screen is
clogged
Clean
There is insufficient air
flow
Check the flow, replace
the
COSPECT
if
necessary
The piston is clogged
with dirt
Clean
Check the piston ring
The piston ring is worn Replace with a new
piston ring
The secondary
pressure
cannot be
adjusted or
increases
abnormally
Adjustment is
difficult, and set
pressure varies
There is a build-up of
dirt on the sliding
surfaces of the pilot,
piston or main valve
Clean
Troubleshooting continued on next page
