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TROUBLESHOOTING
PROBLEM
Compressor will not run
Motor hums but cannot run or runs slowly
Internal overload switch trips repeatedly
Air tank pressure drops when compressor
shuts off
Excessive moisture in discharge air
Compressor runs continuously
Air output lower than normal
NITTO is a registered trademark owned by Nitto Kohki Co., Ltd
POSSIBLE CAUSE
Batteries are not charged
Pressure switch bad
Tank is full of air
Internal overload switch is tripped
Shorted or open motor winding
Defective check valve or unloader
Lack of proper ventilation/room temperature
too high
Electrical overload
Loose drain valve / open drain valve
Check valve leaking
Excessive water in air tank
High humidity
Defective pressure switch
Excessive air usage
Piston rings are worn
Broken inlet valves
Connections leaking
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SOLUTION
Recharge both battery packs.
Take compressor to service centre.
Compressor will turn on when tank pressure
drops to cut-in pressure.
Turn off compressor and allow unit to cool;
remove and reinstall battery packs.
Take compressor to service centre.
Take compressor to service centre.
Move compressor to well ventilated area.
Turn off unit and allow to cool; remove and
reinstall battery packs.
Check all connections with soap and water
solution and tighten.
Tighten drain valve / close drain valve.
Take compressor to service centre.
DANGER
Do not disassemble check valve, tank
drain valves or safety relief valve with
air in tank — bleed tank.
Drain tank.
Move to area of less humidity; use air line
Take compressor to service centre.
Decrease air usage; compressor not large
enough for tool's requirement.
Replace piston rings; Call customer service
for assistance.
Take compressor to service centre
Tighten connections.
11
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