Trouble Shooting - SMC Networks AFG20 Series Operation Manual

9. Trouble Shooting

Refer to the sections [8. Operation and Adjustment] (P19-P20), [10. How to Replace the Components] (P22-25) and [11.
Disassembly Drawing] (P26).
Trouble
Category Failure
Air leakage
from between
the body and
the bowl.
Air leakage
from the bowl.
Air leakage
from the drain
cock.
Drain or air
continues
blowing out
from the drain
discharge of
the float type
auto drain.
Drain is not
discharging
when the drain
cock opens.
Too much
drain comes
from the piping
of outlet side.
Note) Fluorine grease is recommended.
Possible cause
1. The bowl seal is damaged.
1. The bowl is damaged.
1. Foreign matter caught in the valve of the
drain cock.
2. Seating part of the drain cock is
damaged.
1. Low supply pressure
2. The product is not mounted correctly.
3. Foreign matter is caught at the main
valve of the auto drain.
4. Main valve of the auto drain is broken.
5. Drain piping is long, or I.D. of the piping
is small. (Back pressure is applied.)
6. Drain discharging part and bowl seat are
damaged.
1. Blockage of outlet of the drain cock due
to solid foreign matter etc.
1. Drain level reaches the baffle.
Countermeasure
Replace the bowl seal.
Grease up before replacing the bowl seal.
Note)
Replace the bowl assembly.
(If the solvent is considered to be harmful,
replacement to a metal bowl is
recommended.)
Open the drain cock for a few seconds for
blowing.
Replace the bowl assembly.
Confirm the minimum operating pressure of
the auto drain.
Install the drain exhaust so that it will face
vertically downward.
Eliminate the dirt by manual discharge.
Replace the bowl assembly.
Be sure to connect the appropriate piping
for drain.
Replace the bowl assembly.
Replace the bowl assembly.
Open the drain cock for discharging.
21
Page for
reference
P22-23
P22-23
P19-20
P22-23
P7
P10-17
-
P20
P23-23
P6
P22-23
P22-23
P19-20