Section 8
TROUBLESHOOTING
38
8.2 TROUBLESHOOTING (CONTINUED)
SYMPTOM/MESSAGE PROBABLE CAUSE REMEDY
P3 LO (continued) Oil Pressure Falls Below 25 psig
(1.7 bar) While Package is Running
Because:
Oil Temperature Too Low Check state of globe valve feeding
oil cooler. In cold ambient envi---
ronments below 40_F(4_C) sump
heating may be required.
Sump Oil Level Too Low Replenish oil level.
Sump Strainer Clogged Refer to Section 7.7.5 for oil sump strainer
maintenance.
LO P1 P3 and/or dP Transducer at Fault Check connection from
transducer. If adequate, replace
transducer.
T1 HI LP Inlet Air Temperature Above Maintain inlet air temperature below
115_F(46_C) 115_F(46_C).
High Interstage Pressure (Loaded) Insufficient oil flow to jackets.
Air flow to intercooler.
Defective HP stage.
Cooling Fan Motor Starter Overloads Reset after heater elements cool
tripped down. Should trouble persist,
check whether motor starter
contacts are functioning
properly.
Temperature Transducer Failure Check connections from transducer
If adequate, replace transducer.
Blowdown Valve Failed to Open Refer to Component Manual for valve
or Operated Sluggishly maintenance.
T2 HI Intercooler C ore Fouled Clean finning.
Discharge Check Valve Leaking Refer to compressor’s Operators Manual
During Unloaded Operation for check valve maintenance.
Inlet Throttling Valve Not Fully Open See inlet valve adjustment.
During Loaded Operation Low oil pressure defective control
solenoid valve.
Inlet Air Filter Clogged Refer to compressor’s Operators
Manual
forfiltermaintenance.
Line Pressure is Too High Reset Supervisor unload pressure.
Temperature Transducer Failure Check connection from trans---
ducer. If adequate, replace
transducer.
Blowdown Valve Failed to Open Refer to Component Manual for valve
or Operated Sluggishly maintenance.
P1 HI Defective HP Stage Consult Sullair Service Department.
Pressure Transducer Failure Check connection from trans---
ducer. If adequate replace
transducer.
P2 HI Blowdown Valve Failed to Open Refer to Component Manual for valve
maintenance.
Limit Switch Controlling Blowdown Check actuation and butterfly disc
Val ve Failed to Operate See Section 7.7 for blowdown
valve maintenance.
Control Air Filter Clogged See Section 7.7 for control filter
maintenance.
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