Motor unable
Run or running too
slow, or
overheating
⑴ Fault in line, or voltage insufficient
⑵ Power wire too thin or too long
⑶ Fault in pressure switch
⑷ Fault in motor
⑸ Sticking of main compressor
⑴ Check the line
⑵ Replace the wire
⑶ Repair or replace
⑷ Repair or replace
⑸ Check and repair
Sticking of
main
compressor piston
⑴ Moving parts burnt due to low oil
level
⑵ Moving parts damaged or stuck by
foreign body
Check crankshaft, bearing,
connecting rod, piston, piston
ring, etc. and replace if
necessary
Terrible vibration
or abnormal
noise
⑴ Connecting part loosed
⑵ Foreign body got into main
compressor
⑶ Piston knocking valve seat
⑷ Moving parts seriously worn
⑴ Check and retighten
⑵ Check and clean away
⑶ Replace with thicker
paper gasket
⑷ Repair or replace
Insufficient Pressure or
Discharge capacity
decreased
⑴ Motor running too slow
⑵ Air filter clogged up
⑶ Leakage of safety valve
⑷ Leakage of discharge pipe
⑸ Sealing gasket damaged
⑹Valve plate damaged, carbon buildup
or stuck
⑺ Piston ring and cylinder worn or
damaged
⑴ Check and remedy
⑵ Clean or replace the
cartridge
⑶ Check and adjust
⑷ Check and repair
⑸ Check and replace
⑹ Replace and clean
⑺ Repair or replace
The oil
consumption
too excessive
⑴ Oil level too high
⑵ Breath pipe clogged up
⑶ Piston ring and cylinder worn or
damaged
⑴ Keep the level within
set range
⑵ Check and clean
⑶ Repair or replace
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