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Section 8
TROUBLESHOOTING
8.2 TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM
COMPRESSOR
SHUTS DOWN
(CONTINUED)
COMPRESSOR
WILL NOT BUILD
UP FULL DIS-
CHARGE PRES-
SURE
LINE PRESSURE
RISES ABOVE P2
PRESSURE
36
PROBABLE CAUSE
High Discharge Temperature
(Cont.)
Low Fluid Pressure
Low Water Pressure
Air Demand is Too Great
Dirty Air Filter
Pilot Pressure Regulator Out of
Adjustment
Defective Pilot Pressure Regulator
Defective Minimum Pressure
Valve
Inlet Valve Not Opening
Completely
Defective Control Inlet Solenoid
Valve
Leak in Control System Causing
Loss of Pressure Signals
REMEDY
Cooling water flow insufficient; check water lines and
valves (water-cooled).
Cooler plugged; clean tubes. If plugging persists, install
water conditioner (water-cooled).
Low fluid level; add fluid.
Clogged filter; change the fluid filter element if mainte-
nance indicator shows red, and/or dP2 on controller indi-
cates high dP.
Thermal valve not functioning properly; replace element.
Cooling air flow restricted; clean cooler and check for
proper ventilation (air-cooled).
Ambient temperature too high; provide sufficient ventila-
tion (air-cooled).
RTD probe out of calibration, or bad RTD. Replace if
necessary.
Clogged filter; replace fluid filter element.
Check oil stop valve for proper operation. Repair or
replace as necessary (kit available).
Check water lines and valves (water-cooled).
Check service lines for leaks or open valves.
Check the filter indicator and change or clean element if
required.
Adjust regulator according to control adjustment instruc-
tions in the Maintenance section.
Check diaphragm and replace if necessary (kit avail-
able).
Check that the piston is moving freely.
Check poppet regulating valve; signal must be 60 psi.
Readjust if necessary.
Repair or replace.
Check for leaks.
CONTINUED...
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