http://air.ingersollrand.com
TROUBLe SHOOTInG
OPeRATIOn AnD MAInTenAnCe MAnUAL
TROUBLe SHOOTInG
PROBLeM
CAUSe
ReMeDY
Compressor fails to
start
Mains power or Control voltage not
available.
§
§
§
Check incoming power supply.
Check the control circuit fuse.
Check the transformer secondary windings
for the control voltage.
Defective Star / Delta timer.
§ Change Star / Delta timer.
Machine shuts down
periodically
High airend temperature.
Top up coolant.
Motor overload.
§ Set overload to correct value and switch to
manual reset.
Line voltage variation.
§ Ensure voltage does not drop below 10% on
start up and % running.
High current draw
Compressor operating above rated
pressure.
Set pressure to correct rating for machine.
Separator cartridge contaminated.
Change air filter, and separator element.
Low voltage.
§ Ensure voltage does not drop below 10% on
start up and % running.
Unbalanced voltage.
Correct incoming supply voltage.
Damaged airend.
† Change Airend.
Low current draw
Air filter contaminated.
Change air filter.
Compressor operating unloaded.
Set pressure to correct rating for machine.
High voltage.
Reduce site voltage to correct operating
voltage.
Defective inlet valve.
† Fit inlet valve service kit.
High discharge
pressure
Defective or incorrect pressure switch
setting.
Replace or set pressure to correct rating for
machine.
Blowdown valve defective.
† Fit blowdown solenoid service kit.
Inlet valve malfunction.
† Fit inlet valve service kit.
Low system air
pressure
Separator cartridge contaminated.
Fit new Separator element.
Incorrect pressure transducer setting
Set pressure to correct rating for machine.
Minimum pressure valve malfunction.
† Fit Minimum pressure valve service kit.
Blowdown valve defective.
† Fit blowdown solenoid service kit.
Drive belt slipping.
Fit new belt.
Air system leaks.
† Fix leaks.
Inlet valve malfunction.
† Fit inlet valve service kit.
System demand exceeds compressor
delivery.
Reduce demand or install additional
compressor.
Compressed air filters contaminated.
Replace air filter elements.
High dewpoint
Refrigeration compressor not supplied
power.
Check incoming power supply.
Check the dryer protection fuse.
Check auxiliary contact on main motor
contactor.
Condensate system malfunction.
Check operation of drain valve.
Check operation of condensate check valves.
Condenser dirty.
Clean condenser and replace panel filter
element.
Ice formation in dryer
Low evaporator pressure.
Check hot gas valve setting.
