Troubleshooting; Trouble Shooting Chart - TLV COSR-3 Einbau- Und Betriebsanleitung

7. Troubleshooting

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 COS/COSR, consult the troubleshooting guide below.
Problems are classified as follows:
1. Secondary pressure does not increase
2. Secondary pressure cannot be adjusted or increases abnormally
3. Hunting occurs (fluctuation in secondary pressure)
4. Chattering occurs (heavy mechanical noise)
5. Steam leaks from the steam 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, flow rate and clogs by dirt and scale.
To ensure performance for a long period of time, it is recommended that the Safety
Considerations and Adjustment sections be reviewed.
Troubleshooting Chart
Problem
Secondary
The body is not
pressure
warm
does not
rise
The body is warm,
but pressure does
not increase
Secondary Adjustment is
pressure difficult, and set
cannot be pressure varies
adjusted or
increases
abnormally
Symptom
No steam is being supplied
or the inlet valve is closed
The screens are clogged
The strainer is clogged
The pilot screen is clogged
There is insufficient steam
flow
Piston is clogged with dirt
The small hole on the piston
is clogged
The piston ring is worn
There is dirt build-up on the
sliding surfaces of the pilot
valve, piston or main valve
Flow rate exceeds rated
flow rate
The adjustment screw has
seized
The diaphragm is distorted
or damaged
There is a fluctuation in
steam consumption
The selected model is
inappropriate for the service
conditions (specifications)
Cause
― 23 ―
Remedy
Check the valves
Clean or blow down
Clean
Check the flow, replace the
COS/COSR if necessary
Clean; check the piston ring
Clean
Replace with a new piston
ring
Clean
Check the flow rate, replace
with a larger size
Replace with a new
adjustment screw
Replace with a new
diaphragm
Check the flow rate, replace
the COS/COSR if necessary
Check the model selection,
replace the COS/COSR if
necessary