Secoh JDK-30 User manual

0$,17(1$1&( MANUAL
FOR
LINEAR COMPRESSORS
MODEL : JDK-20
JDK-30
JDK-40
JDK-50
SECOH SHANGHAI MEC LTD
READ AND FOLLOW ALL SAFETY INSTRUCTIONS.
KEEP THIS MANUAL FOR FUTURE REFERENCE.

Parts name
Filter cover
Truss head screw
Inlet
Overall Cover
Outlet
L-joint Hose
Hose Clamp (2pcs)
Power supply cord
Filter element

Fig 2-A
Fig 2-B
(A)
Filter cover
Filter element
Overall cover
Periodic maintenance
Filter element cleaning
○Undo the truss head screw and remove the
filter cover (Ref.:Fig.2-A).
○Remove the filter element and shake out the
dust by hand. If it is heavily clogged, wash it
with a neutral detergent. Rinse with water
and dry it in the shade
○Reassemble the filter element back in place
and press in the filter cover.
○Fix the filter cover by the truss head screw.
Replacement of filter element,
valve box, diaphragm
○Replace the filter element following the
procedure in 3-1 filter element cleaning.
○Undo the screws (A) and remove the overall
cover and overall cover packing. (Ref: Fig
2-B)
○Always disconnect power before servicing. Failure to do so could result
in electrical shock, personal injury or death.
○Clean the filter element quarterly. A clogged filter element can cause
overheating or pump failure.

Valve box
Holder cover
(B)
Overall cover
packing
Fig 2-C
Fig 2-D
Diaphragm holder
Solenoid
Magnet
（D）
(C)
○Undo the screws (B) and remove the holder
cover. (Ref: Fig 2-C)
○Undo the screws (C) and replace the valve box
of both sides. (Ref: Fig 2-C)
○Undo the nuts (D) and remove diaphragm
holders and diaphragms from the magnet. (Ref:
Fig 2-D)
○Set the new diaphragm holders and diaphragms
and fasten them with the nuts. (D). ( Ref: Fig
2-D)
Notes:
Use the new nuts (D) in the repair kit.
Note the locating notch for reassembly.
○Assemble by reversing the disassembly
procedure.
Notes:
Keep the magnet from touching the solenoids.
○Check airflow and sound level before installation.
Automatically reset thermal protector
An automatically reset thermal protector installed on the solenoid stops pump
operation if solenoid temperature becomes over 130 ± 5 ℃. When the
solenoid temperature cools down to 85 ± 15 ℃, the protector is reset
automatically and pump operation restarts.
○Do not touch live parts. Touching live parts will result in electric shock.
○If the magnet contacts the solenoids during operation, it will cause
damage on parts, abnormal heat, and short circuiting.

Trouble shooting
Observation
Possible cause
Action
Pump does not
operate.
・Improper electrical
connection
・Check plug and outlet
and plug completely.
Discharge air
decreased.
Pump surface
is abnormally
hot.
Pump operates
intermittently
・Pipe or diffuser clogged
・Valve in plumbing shut
・Filter element clogged
・Clean pipe or diffuser.
・Open the valve
・Clean filter element.
Pump operates
but with
abnormal noise.
・Faulty valve or diaphragm
・Replace valve and
diaphragm.
Replacement parts
Kit name
Contained parts
Quantity (pcs)
Diaphragm repair kit for JDK
Diaphragm
2
Diaphragm holder
2
Nut
2
Valve box
2
Filter element
1
Overall cover packing
1