Portable Compressor 7/20
14---1
SEPTEMBER 2003
14. TROUBLESHOOTING
14.1.
COMPRESSOR TROUBLESHOOTING
If the compressor does not function properly, use the following chart to identify and correct the cause.
Table 14---1.
COMPRESSOR TROUBLESHOOTING
Fault
Cause
Remedy
Air discharge
capacity too low
Engine speed too low
Blocked air cleaner
High pressure air escaping
Incorrectly set regulation system
Check the air cylinder and air filter(s)
Check the restriction indicators and replace the element(s) if
necessary
Check for leaks
Reset the regulation system.
Refer to
9.23. SPEED AND PRESSURE REGULATION
ADJUSTMENT
in the
9. MAINTENANCE
section of this manual.
Compressor
overheats
Low oil level
Dirty or blocked oil cooler
Incorrect grade of oil
Recalculations of cooling air
Faulty temperature switch
Reduced cooling air from fan
Top up the oil level and check for leaks
Clean the oil cooler fins
Use Ingersoll---Rand recommended oil
Move the machine to avoid recirculation
Check the operation of the switch and replace if necessary
Check the fan and the drive belts. Check for any obstruction
inside the fan cowl
Excessive oil
present in the
discharge air
Blocked scavenge line
Perforated separator element
Pressure in the system is too low
Check the scavenge line, drop tube and orifice. Clean and
replace
Replace the separator element
Check the minimum pressure valve or sonic orifice
Safety valve
operates
Operating pressure too high
Incorrect setting of the regulator
Faulty regulator
Inlet valve set incorrectly
Loose pipe/hose connections
Faulty safety valve
Check the setting and operation of the regulator valve piping
Adjust the regulator
Replace the regulator
Refer to
9.23. SPEED AND PRESSURE REGULATION
ADJUSTMENT
section of this manual
Check all pipe/hose connections
Check the relieving pressure. Replace the safety valve if faulty.
Do not attempt a repair.
Oil is forced back
into the air filter
Incorrect stopping procedure used
Faulty inlet valve(s)
Faulty discharge check valve
Always employ the correct stopping procedure. Close the
discharge valve and allow the machine to run on idle before
stopping
Check for free operation of the inlet valve(s)
Remove the valve from the discharge pipe and check the
operation
Machine goes to full
pressure when
started
Inlet valve set incorrectly
Refer to
9.23. SPEED AND PRESSURE REGULATION
ADJUSTMENT
section of this manual
