Section 7 - Operating Incidents; A - Main Incidents - Chicago Pneumatic QRS 20 Instruction Manual

Section 7 - Operating incidents

The staff in charge of maintenance of the CP compressor must become fully acquainted with this machine, in order to be able to easily
diagnose any anomaly. Under normal operating conditions, the CP compressor must provide full satisfaction.

A - Main incidents

The main incidents likely to occur are listed below, along with the remedies to be applied. The markers of the indicator lights relate to the
control panel.
Observed defects
1. THE COMPRESSOR DOES NOT
START
2. THE COMPRESSOR
OVERHEATS
3. THE COMPRESSOR STOPS WHEN
THE MOTOR PROTECTION
UNIT TRIPS
4. OPENING OF SAFETY VALVE
5. EXCESSIVE OIL CONSUMPTION
6. DELIVERY PRESSURE TOO LOW
7. COMPRESSED AIR OUTPUT
TOO LOW
8. EXCESSIVE NOISE OF UNIT
9. THE COMPRESSOR STOPS
UNTIMELY OR CREATES
NON-EXISTING FAULTS
Chicago Pneumatic Compressors
62 305 454 65
Possible causes
a) Main switch open.
b) Phase missing.
c) Fuse.
d) Insufficient voltage at motor terminals.
e) Compressor under pressure.
f) Low temperature.
a) Ambient temperature too high.
b) Obstruction of the passage of cooling
through the oil cooler.
c) Oil level too low.
d) Oil circuit blocked.
a) Compressor motor overload.
b) Phase unbalance
a) To clean separator cartridge.
b) Valve of suction box out of use or
not closed.
c) Faulty pressure switch, sensor
or solenoid valve.
d) Working pressure too high
a) Blocked oil retainer.
b) Oil leaks in the CP compressor
compressor.
c) Faulty oil separator element
a) Incorrect pressure settings.
b) The desired output is higher than the
one of the compressor.
c) Closed suction valve.
d) Pressure regulator incorrectly adjusted
(modulating control option).
a) Blocked air filter.
b) Adjusting solenoid valve not working.
a) Fixing bolts of compressor or motor
have come loose.
b) Soundproof panels incorrectly closed.
c) Transport retainer blocks (red parts)
not removed.
a) Electromagnetic disturbance on the
ES 3000 electronic controller.
Solutions
a) Close the switch.
b) Check the circuits.
c) Replace.
d) Check the voltage and the connections.
e) Check the vacuum device and change if
necessary. Check the water-tightness
of the minimum pressure valve.
f) Maintain temperature ≥2 °C
a) Make openings or install ducts to
evacuate the hot air (see Section 2).
b) Clean the cooler (see Section 5 - D).
c) Check and top-up oil level.
d) Check that the oil filter is clean. Drain.
Replace the cartridge.
a) Check the electric connections are
tighten. Check the pressure of the
compressed air and the pressure
settings.
b) Check the phases currents
a) Change the separator cartridge.
b) Check valve, piston and joints of suction
box.
c) Check that the pressure switch and
solenoid valve and pressure sensor
are in good working order.
a) Check the oil return pipes.
b) Look for oil leaks and rectify.
c) Replace the separator cartridge.
(see Section 5 - E)
a) Adjust the pressure (see Section 3).
b) Check consumption and possible leaks.
c) Check solenoid valve, pressure setting
valve.
d) Check setting.
a) Clean filter.
b) Check setting.
a) Tighten.
b) Check that they are closed.
c) Remove retainer blocks.
a) Add an interference suppression kit
(contact the after sales department)
01/2008
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