Instruction manual

4-10
4.3.2 Troubleshooting of Air Compressor
If the air compressor becomes faulty, reference should be made to the following table.
Symptom Probable Cause Remedy
Air compressor rotates.
Drain or stop valve leaks. Retighten. If the valve still leaks,
replace with a new one.
Packing, screw or seal is
defective.
Retighten or replace the packing
with a new one.
Safety valve leaks. Replace with a new one.
Air valve is defective. Clean or replace with a new one.
Suction filter has clogged. Clean or replace with a new one.
Piston ring has worn. Replace with a new one.
Starting unloader is faulty. Ask service agent for repair.
Pressure does not rise
at all or rises very
slowly.
Pressure gauge reading is
improper.
Replace with a new one.
Pressure switch is faulty. Adjust or replace with a new one. Maximum pressure
limit is exceeded.
Pressure gauge reading is
improper.
Replace with a new one.
Push solenoid is faulty. Ask service agent for repair.
Piston hits air valve. Ask service agent for repair.
Bearing is defective. Ask service agent for repair.
Rider ring has worn. Replace with a new one.
Abnormal sound has
been emitted.
Installation is inappropriate. Install on level floor.
Sliding part has scorched. Ask service agent for repair.
Motor overheats.
Motor is abnormal. Ask service agent for repair.
Air compressor does not rotate.
Pressure switch is faulty. Replace with a new one. Motor does not whir to
drive.
Protector is actuated. Stop operation, and then restart.
Voltage has dropped. Replace wires with the specified
ones.
Air valve leaks. Replace with a new one.
Motor whirs to drive.
Starting unloader is faulty. Ask service agent for repair.
• When asking the service agent for repair, please notify them of the following.
1. Model code 2. Symptom of trouble 3. Location of installation site