11 8 Product Warranty - TLV COS Série Manuel D'utilisation

Troubleshooting Chart (continued)
Problem Symptom
Secondary Upon closing
pressure
secondary side
cannot be
valves, secondary
adjusted or
pressure abruptly
increases
rises as high as
abnormally
primary pressure
(continued)
Hunting or Occurs at low
chattering steam demand
occurs
Hunting never
stops
Chattering never
stops
Abnormal Makes a high-
noises pitched noise
Faulty Steam is blowing
steam trap
(COS only)
No condensate is
discharged
8. Product Warranty
1) Warranty Period: one year after product delivery.
2) TLV CO., LTD. warrants this product to the original purchaser to be free from defective
materials and workmanship. Under this warranty, the product will be repaired or replaced at
our option, without charge for parts or labor.
3) This product warranty will not apply to cosmetic defects, nor to any product whose exterior
has been damaged or defaced; nor does it apply in the following cases:
1. Malfunction due to improper installation, use, handling, etc., by other than TLV CO., LTD.
authorized service representatives.
2. Malfunctions due to dirt, scale, rust, etc.
3. Malfunctions due to improper disassembly and reassembly, or inadequate inspection and
maintenance by other than TLV CO., LTD. authorized service representatives.
4. Malfunction due to disasters or forces of nature.
5. Accidents or malfunctions due to any other cause beyond the control of TLV CO., LTD.
4) Under no circumstances will TLV CO., LTD. be liable for consequential economic loss or
damage or consequential damage to property.
Cause
The bypass valve is leaking
The pilot valve seat or main
valve seat is damaged or
there is a build-up of dirt
COS/COSR is operated
below the lower flow rate limit
Reduction ratio is too high
(operated at below 10% of
the primary pressure)
The selected model is
inappropriate for the service
conditions (specifications)
Condensate is contained, or
the trap is blocked
The selected model is
inappropriate for the service
conditions (specifications)
Reduction ratio is too high
The flow is too great
There is a high-speed
open/close valve nearby
There is dirt build-up on the
trap valve seat or at the
float base
The body is installed tilted
The float is deformed
Piping vibration
The primary pressure
exceeds the trap valve seat
maximum working pressure
(exceeds operating
pressure range of COS)
Water is inside the float
The outlet piping is clogged Check the piping; clean
The trap valve seat is
clogged
̶ 24 ̶
Remedy
Check, clean, and replace
with a new valve if necessary
Clean; align; replace if
necessary
Check steam supply volume,
replace with smaller valve
Use a two-stage reduction
arrangement
Check the model selection,
replace the COS/COSR if
necessary
Check the trap; check the
piping
Check the model selection,
replace the COS/COSR if
necessary
Use two-stage reduction
Check the flow rate, use
a larger size valve
Install the valve as far away
as possible
Clean
Check the piping
Check for water hammer;
replace with a new float
Secure the piping
Ensure COS is used within
the operating pressure
range
Replace with a new float
Clean or replace with a new
trap valve seat