SECTION 9 DE-18 USER MANUAL
99
HI T4 SD Temperature Transducer Failure Check connections from transducer. If
adequate, replace transducer.
Intercooler Core Fouled Clean fins.
Compressor Air Inlet Temperature
Above 115°F (46°C)
Maintain air inlet temperature below 115°F
(46°C).
High Interstage Pressure (Loaded) Insufficient coolant flow to jackets.
Defective HP stage.
High Interstage Pressure (Unloaded) Clogged blowdown silencer- clean and
replace.
Slowdown Valve Failed 10 Open During
Unload
Refer to BLOWDOWN VALVE
MAINTENANCE on page 86
Low Fan Speed Re-tension fan bell or replace if damaged.
HI T5 SD Temperature Transducer Failure Check connections from transducer. If
adequate, replace transducer.
Aftercooler Core Fouled Clean fins.
InleT Throttling Valve Not Fully Open
During Loaded Operation
See inlet valve adjustment, or low oil
pressure, defective 4-way solenoid valve,
or defective hydraulic cylinder.
Slowdown Valve Failed 10 Open or
Opened Sluggishly
Refer to BLOWDOWN VALVE
MAINTENANCE on page 86.
Low Fan Speed Re-tension fan belt or replace if damaged.
AIR FLTR DP SD Dirty Air Intake Filter and Bad Switch Clean pre-filter. Replace both filter
elements. If necessary, check switch.
COMPRESSOR DOES NOT
BUILD FULL DISCHARGE
PRESSURE
Air Demand Exceeds Supply Check air service lines for open valves or
leaks.
Inlet Air Filler Clogged Check for maintenance message on
controller display. Change element.
Inlet Air Valve Not Fully Open Check actuation and butterfly disc position.
Low oil pressure defective control solenoid
valve.
Transducer P2 Malfunction Check connections from transducer. II
adequate, replace transducer.
Blowdown Valve Leaking or Sluggish Refer to BLOWDOWN VALVE
MAINTENANCE on page 86.
Defective LP Stage Consult Sullair Service Department.
SYMPTOM/MESSAGE PROBABLY CAUSE REMEDY
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