172-65392MA-08 (VS1C) 25 Nov 2021
11
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.
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 air discharged
(blocked) or
discharge is poor
Air is not reaching the vent because the
water in the piping is not being displaced
by air
Correct the inlet piping
(Inner diameter should be at
least 16mm (
5
/
8
in))
The valve seat is clogged
Clean the valve seat
The inlet or outlet piping is clogged
Clean the piping and any
upstream strainer
Operating pressure exceeds the rated
maximum operating pressure
Replace with a product of
suitable operating pressure
Water leaks when
valve is closed
The valve seat is clogged with dirt or scale
or is damaged
Clean or replace with a new
valve seat
The float is dirty or coated with a film, or
is deformed
Clean or replace with a new
float
Improper installation orientation
Correct the installation
Valve does not
close, and water
spurts out
Water is inside the float
Replace with a new float
The guide plate is damaged
Replace with a new plate
Specific gravity of the liquid is not suitable
for this product
Select a product with
suitable specifications for the
operating conditions
WARNING
CAUTION
