172-65417MA-05 (FS21-L/FS21-H + BD2) 4 Oct 2021
15
Troubleshooting
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
If the trap fails to operate properly, use the following table to locate the cause and
remedy.
Problem
Cause
Remedy
No condensate is
discharged
(blocked) or
discharge is poor
The float is damaged or filled with
condensate
Replace with a new float
The float is sticking to the valve
seat
Clean parts
The valve seat opening, screen or
piping are clogged with rust and
scale
Clean parts
The capacity of the product is
insufficient
Compare specifications and actual
operating conditions
The product operating pressure
exceeds the maximum specified
pressure or there is insufficient
pressure differential between the
product inlet and outlet
Compare specifications and actual
operating conditions
Steam locking has occurred
Perform a bypass blowdown or
close the trap inlet valve and allow
the trap to cool
Steam is
discharged or
leaks from the
outlet
(blowing)
(steam leakage)
The valve seat opening is clogged
or there is rust or scale build-up on
the surface of the float
Clean parts
The valve seat is damaged
Replace with a new valve seat
The float is damaged
Replace with a new float
Improper installation
Correct the installation
The bimetal air vent strip is
damaged
Replace with a new bimetal strip
Trap vibration
Lengthen the inlet piping and fasten
it securely
Steam is leaking
from a place other
than the outlet
Gasket deterioration or damage
Replace with a new gasket
Improper tightening torques were
used
Tighten to the proper torque
Float frequently
becomes damaged
Water hammer has occurred
Study and correct the piping
NOTE: If parts need replacement, refer to the parts list in this manual and select the appropriate
kit/unit for replacement parts. Parts are only available as a part of the kits/units shown.
