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■EPDT-292■
8.3 Troubleshooting (See 6.1 Piping example for marks and numbers of stop valves, and see
Fig. 8 for the numbers inside the brackets [ ].)
Trouble
Cause
Remedy
Condensate is not
discharged.
Stop valve V2 at
condensate inlet is closed.
Open stop valve V2.
Pipes at condensate inlet
and condensate outlet are
connected the other way
around.
Connect the pipes correctly. (See 6.1.
Piping example)
Pipes at driving pressure
inlet and discharge port are
connected the other way
around.
Connect the pipes correctly. (See 6.1.
Piping example.)
Strainer 8 at condensate
inlet is clogged.
Disassemble strainer 8 and clean the
screen.
Stop valve V4 at
condensate outlet is closed.
Open stop valve V4.
Stop valve V3 on vent port
piping (pressure
equalization pipe) is closed.
Open stop valve V3.
Driving pressure is too low
against back pressure.
Control the pressure to a specified level by
adjusting reducing valve 6.
Stop valve V1 on pipe at
driving fluid port is closed.
Open stop valve V1.
Strainer 2 on pipe at driving
fluid port is clogged.
Disassemble strainer 2 and clean the
screen.
Driving pressure exceeds
the specified range.
Adjust driving pressure according to
specifications.
(See 1. Specifications.)
Check valve 9 at
condensate outlet is
installed in opposite
direction.
Or the valve does not open.
If in opposite direction, install in proper
direction.
Replace if it does not open.
Check valve 10 at
condensate outlet is
installed in opposite
direction.
Or the valve does not open.
If in opposite direction, install in proper
direction.
Replace if it does not open.
Air vent is broken.
Replace air vent.
Stop valve V6 on pressure
equalization pipe is closed.
Open stop valve V6.
Leakage from vent valve
part at vent valve P [4].
Disassemble the product, and perform
cleaning if the trouble is caused by scales
in vent valve part of vent valve P [4]. If the
trouble is caused by parts failure such as
scratches on the part, replace vent valve P
[4] and vent valve seat [5]. (See Fig 8.4.4.)
Leakage of steam from inlet
valve P [6].
Disassemble the products and replace
inlet valve [6]. (See Fig 8.4.4.)
Float [9] is broken.
Disassemble the products and replace
float [9]. (See Fig 8.4.4.)
