Southern Cross JCD-900 Series, Instruction Manual

Page: 33 / 39

LGCY Series Page 31
4
Compressor
loading
failure after
start-up
1. LOAD/UNLOAD switching valve
failure
2. Air leakage in the control air source
line
3. The servo cylinder membrane
damage.
4. The intake valve is stuck at the closed
position
5. The proportional valve failure
1. Check and repair it
2. Repair or replace the pipeline
3. Replace it
4. Inspect it
5. Remove it to clean
5
Compressor
overheating
1. Insufficient lubricating oil volume
2. Looseness or damage of diesel engine
fan belt
3. High ambient temperature,
insufficient air compressor cooling
4. Internal and external blocking of oil
cooler
5. Lubricating oil specification error or
failure
6. Thermostat valve fault
7. Oil filter clogging
8. Oil content core clogging 1. Check the oil level
2. Tighten or replace it
3. Increase the ventilation, reduce the
ambient temperature, and open doors
and window
4. Clean it
5. Check the oil grade and replace the oil
6. Check whether the oil passes through
the oil cooler. If not, remove it to clean
or replace it
7. Replace it
8. Replace it
6
High oil
consumption
of compressor
1. Too high oil level
2. Lubricating oil specification error or
failure
3. One-way valve orifice blocking
4. Oil content core damage or failure
1. Check the oil level
2. Check the oil grade and replace the oil
3. Remove to clean it
4. Replace it with a new product
7
Insufficient
air
displacement
or discharge
pressure
1. Excessive demand of compressed air
2. Air filter clogging
3. Inappropriate adjustment of proportional
valve
4. Oil content core clogging
5. Too low diesel engine speed
6. Servo air cylinder failure
7. Pressure sensor failure, incorrect pressure 1. Check whether the air supply pipeline
has leakage
2. Purge it or replace the filter element
3. Re-adjust it
4. Replace it
5. Adjust it
6. Replace the membrane
7. Replace it
8
Safety valve
opening
1. Too high set pressure of proportional
valve
2. Proportional valve failure
3. Intake valve seizure
4. Servo air cylinder failure
5. Control pipeline air leakage
6. Minimum pressure valve failure
1. Set the pressure again
2. Inspect or replace it
3. Inspect it
4. Replace the membrane
5. Inspect or replace it
6. Inspect it
9
Oil mist
emitted from
air filter
1. Leakage of check valve on the air
intake valve. 1. Inspect it, and replace it when
necessary