172-65165MA-05 (HR80A) 13 Sep 2021
10
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.
When the product 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
Module valve seat, screen or piping
are clogged with rust or scale
Clean parts
Disc is stuck to the module valve seat Clean parts
Air binding has occurred
Perform a bypass blowdown, or
close the trap inlet valve and allow
the trap to cool
- Disc holder ring has extensive wear
- Replace with a new disc holder
ring
- Bimetal air vent ring has extensive
wear
- Replace with a new bimetal air
vent ring
Steam-locking has occurred
Perform a bypass blowdown, or
close the trap inlet valve and allow
the trap to cool. Piping correction
may also be required.
Trap capacity is insufficient
Compare specifications and actual
operating conditions
Inlet pressure decreased further than
the pressure originally designed for, or
there is insufficient pressure differential
between the trap inlet and outlet
Compare specifications and actual
operating conditions
Steam is
discharged or
leaks from the
outlet
(blowing)
(steam leakage)
Rust or scale on the disc or on the seat
of the module valve seat
Clean parts
Disc and/or module valve seat damage
or wear
Replace with a new disc and/or
module valve seat
Gasket (lower module gasket)
deterioration or damage
Replace with a new gasket
Improper installation
Correct the installation
Trap vibration
Lengthen the inlet piping and
fasten it securely
The cover is loose
Tighten the cover bolt to the
proper torque
Trap operating pressure is less than
the minimum specified pressure
Compare specifications and actual
operating conditions
The back pressure exceeds the
allowable back pressure (back
pressure should not exceed 50% of the
inlet pressure)
Compare specifications and actual
operating conditions
Steam is leaking
from a place
other than the
outlet
Gasket (upper or middle module
gaskets) deterioration or damage
Replace with new gasket(s)
Improper tightening torques were used Tighten to the proper torque
NOTE: When replacing parts with new, use the parts list for reference, and replace with parts
from the Maintenance Kit, Repair Kit, etc. Please note that replacement parts are only
available as part of a replacement parts kit.
CAUTION
