DIS185SSI4F AIR COMPRESSOR • OPERATION MANUAL — REV. #0 (12/19/16) — PAGE 69
TROUBLESHOOTING (COMPRESSOR)
Table 15. Troubleshooting (Compressor)
Sympton
Possible Problem
Corrective Action
Air Pressure too high
Pressure sensor defective?
Check or replace sensor
Proportional solenoid valve frozen?
Check or replace solenoid
Inlet valve seal damaged?
Check or replace inlet valve
Air pressure control pipe frozen?
Check or replace air pressure control pipe
Compressor oil too thick?
Replace with proper oil viscosity
Problem in Fuel System
Fuel tank empty?
Add fuel
Air mixed in fuel system?
Fully extract air. Check for loosened fuel line
Fuel filter clogged?
Check or replace fuel filter and clean tank
Fuel has deteriorated?
Add fuel. Check or replace entire fuel system
Fuel injection system is defective?
Check or replace fuel injection system.
Engine oil level too full?
Reduce oil to correct engine oil level
Engine oil is too thick?
Refill engine crankcase with correct type of oil for cold weather
conditions
Engine oil pressure is reduced?
Replace engine oil and filter
Engine overheats?
Clean cooling air system and cooling fin areas
Warm up time not sufficient in cold weather
conditions?
Comply with cold starting instructions and proper oil viscosity.
Emergency Stop Circuit is
Abnormal
Switch or sensor is defective?
Check or repair switch or sensor
Wiring to water temp. sensor, oil pressure
sensor, discharge air temp. sensor is
disconnected?
Check or repair water temp. sensor, oil pressure or discharge air
temp. sensor
Engine control unit is defective?
Replace or repair engine control unit
No Air Is Delivered
Service valve is closed?
Open valve
Minimum pressure valve is abnormal?
Clean or replace pressure valve
Proportional solenoid valve is abnormal?
Check or replace solenoid valve
Pressure sensor P1 or P2 is abnormal?
Check or replace pressure sensor P1 or P2
Safety Valve Operates
Pressure control piping is frozen?
Check or replace frozen pressure control piping
Proportional solenoid valve is frozen?
Check or replace frozen proportional solenoid valve
Air leaks from control pressure pipe?
Check or replace control pressure pipe
Pressure sensor P1 or P2 is frozen?
Check or replace pressure sensor P1 or P2
Safety valve is set to low value?
Replace safety valve
Air leaks from inlet valve seal?
Check or replace inlet valve seal