Sullair E900H User Manual page 58

7: Troubleshooting
Table 7-1: Troubleshooting guide
Symptom
Compressor shuts down
with air demand present
Compressor will not build
full discharge pressure
52
Probable cause
Loss of control voltage
Low incoming line voltage
Compressor discharge tempera-
ture switch open
Loss of phase trips phase monitor.
Air demand is too great
Dirty air filter
Inlet valve bleed orifice plugged
Pressure regulator out of adjust-
ment
Defective pressure regulator
02250203-986 R03
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E900H User Manual
Remedy
Check incoming power connections
and reset monitor.
Check control fuses and wiring. Con-
sult power company.
Cooling air flow restricted; clean cooler
and check for proper ventilation.
Ambient temperature is too high—pro-
vide sufficient ventilation.
Low fluid level, add fluid
Clogged filter, change fluid filter ele-
ment
Thermal valve not functioning properly;
replace element
Defective discharge temperature
switch; check for a short or open circuit.
If none, replace switch
Cooling fan is being operated in
REVERSE direction. Turn switch to
FORWARD
Check incoming power connections
and reset monitor.
Check service lines for leaks or open
valves up.
Check the filter indicator and inspect
and/or change element if required.
Ensure control line bleed orifice is not
plugged.
Adjust regulator according to control
adjustment instructions in Section 6:
Maintenance.
Check diaphragm and replace if neces-
sary (kit available).
Check valve operation. Replace the
coil or the complete valve if defective.