Section 5
MAINTENANCE
22
5.8 TROUBLESHOOTING - GUIDE (CONTINUED)
SYMPTOM
CAUSE REMEDY
MACHINE WILL NOT START (cont.) Motor starter overloads tripped Reset. Should trouble persist, check
whether motor starter contacts are func-
tioning properly.
Low incoming line voltage Check volt age. Should voltage check
low, consult your power company.
Defective discharge temperature switch Defective discharge temperature thermis-
tor switch. Check for a short or open cir-
cuit to the probe and correct wiring, or
also check for short or open circuit to
control card. If current is not present, re-
place the control card. Should the above
checkout normal, it is possibl e that the
thermistor probe is defective.
MACHINE SHUTS DOWN WITH AIR DE-
MAND PRESENT
Loss of control voltage Reset. If trouble persists, check that line
pressure does not exceed max operating
pressure of your machine (specified on
nameplate).
Low incoming voltage Consult power company.
Excessive operating pressure Defect in pressure switch, check pres-
sure at which contact points open.
Separator requires maintenance, check
maintenance indicator under full load
conditions.
High pressure shutdown switch is ad-
justed too low, readjust.
Excessive operating pressure Defective pilot valve. Pilot 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
40-55 PSI when maximum operating
pressure is reached.
Discharge temperature thermistor switch
open
Cooling water temperature too high, in-
crease 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
andcheckforproperventilation.
Ambient temperature is too high, provide
sufficient ventilation.
Low fluid level, add fluid.
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