Section 6
MAINTENANCE
32
TROUBLESHOOTING
SYMPTOM
PROBABLE CAUSE
REMEDY
COMPRESSOR WILL NOT START
Main Disconnect Switch Open
Close switch.
Line Fuse Blown
Replace fuse.
Control Transformer Fuse Blown
Replace fuse.
Motor Starter Overloads Tripped
Reset. Should trouble persist, check
whether motor starter contacts are
functioning properly.
Low Incoming Line Voltage
Check voltage. Should voltage check low,
consult power company.
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND PRESENT
Loss of Control Voltage
Reset; if trouble persists, check that line
pressure does not exceed maximum
operating pressure of the compressor
(specified on nameplate).
Low Incoming Voltage
Consult power company.
Excessive Operating Pressure
Defect in line pressure switch; check
pressure at which contact points open.
Separator requires maintenance; check
maintenance gauge under full load
conditions.
High pressure shut---down switch is adjusted
too low; readjust to 135 PSIG (931kPa).
Defective solenoid valve; solenoid valve
should cause control lever to move to
unload stop when the pressure switch
contacts open. Repair if defective.
Defective blowdown valve; blowdown valve
should exhaust sump pressure to 30 to 35
PSIG (207 to 241kPa) when maximum
operating pressure is reached. Repair if
defective.
Discharge Temperature Switch
Cooling water temperature too high;
Open
increase water flow (water---cooled only).
Cooling water flow insufficient; check water
lines and valves (water---cooled only).
Cooler plugged; clean tubes. If plugging
persists, install water conditioner
(water---cooled only).
Cooling air flow restricted; clean cooler and
check for proper ventilation.
Ambient temperature is too high; provide
sufficient ventilation.
Low fluid level; add fluid.
Clogged filter; change the fluid filter
element if indicated by the maintenance
gauge.
Thermal valve not functioning properly;
replace element (air---cooled only).
Water flow regulating valve not functioning
properly; change (water---cooled only).
Defective discharge temperature switch;
check for a short or open circuit to probe
and correct wiring.
Summary of Contents for 10B 25HP
Page 2: ...NOTE For Additional Information on 24KT Units See Inside Back Cover...
Page 4: ...NOTES...
Page 22: ...16 NOTES...
Page 24: ...Section 4 INSTALLATION 18 Figure 4 1 Piping and Instruments...
Page 26: ...20 NOTES...
Page 42: ...36 NOTES...
Page 44: ...NOTES...
Page 45: ......