Section 5
MAINTENANCE AND TROUBLESHOOTING
26
5.4D TROUBLESHOOTING --- DS---13 (Continued)
SYMPTOM/MESSAGE PROBABLE CAUSE REMEDY
LOW COOL Water Pressure Supply Below Check cooling water supply (i.e.,
5 psig (0.3 bar) closed valves).
Cooling Fan Motor Starter Overloads Reset after heater elements cool down. Should
Tripped. trouble persist, check whether motorstarter con ---
tacts are functioning properly.
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND:
MOTOR OL Motor Starter Overloads Tripped Reset after heater elements cool
down. Should trouble persist,
check whether motor starter contacts
are functioning properly.
(I)
Low Incoming Line Voltage Check voltage. Should voltage
check low, consult power company.
P3 LOW Oil Pressure Falls Below 40 psig
(2.8 bar) While Package is Running
Because:
Oil Pump Malfunctioned Consult Sullair Service Dept.
Oil Filter Clogged Replace filter element.
Oil Temperature Too Low Check state of globe valve feeding
oil cooler. In cold ambient envi---
roments below 40
_
F(4
_
C) sump
heating may be required.
Sump Oil Level Too Low Replenish oil level.
Sump Strainer/Check Valve Clogged Refer to compressors Operators Manual for sump
maintenance.
LO P1 P3 and/or dP Transducer at Fault Check connection from
transducer. If adequate, replace
transducer.
T1 HI Exceeded Pre---Alarm Temperature
of 415˚ F (213 ˚C)
Exceeded Shutdown Temperature
of 425˚ F (218˚ C)
LP Inlet Air Temperature Above Maintain inlet air temperature
105
_
F(41
_
C) below 105
_
F(41
_
C).
High Interstage Pressure Insufficient water flow to inter---
cooler.
High water temperature.
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.
T2 HI Exceeded Pre---Alarm Temperature
of 415˚ F (213˚ C)
Exceeded Shutdown Temperature
of 425˚ F (218˚ C)
Low Water Flow to Intercooler Check state of globe valve and/or
adjustment of optional water
regulating valve.
(I)
Also check that the compressor---motor driveline rotates freely. Incase of rotating resistance or rubbing, contact
Sullair Service Department.