Section 5
MAINTENANCE AND TROUBLESHOOTING
25
5.4C TROUBLESHOOTING GUIDE --- LS---16T & LS---20T (Continued)
SYMPTOM PROBABLE CAUSE REMEDY
P1 HI Message Control Air Signal Leaks Check tube work feeding control
(Continued) signal for leaks
Control Air Signal Filter Clogged Service filter assembly
SEP MNTN Message Plugged separator Replace separator elements.
dP1 > 10 PSI (0.7 bar) Check P1 & P2 pressure transducers.
COMPRES SOR DOES NOT
BUILD FULL DISCHARGE
PRES SURE Air Demand Exceeds Supply Check air service lines for open
valves or leaks.
Inlet Air Filter Clogged Check for maintenance message on
Supervisor display. Inspect and/or
change element.
Inlet Valve Not Fully Open Check actuation and butterfly disc
position.
Pressure Sensor and/or Connections Check connections from transducer.
at Fault If adequate, replace transducer.
Blowdown Valve Leaking Repair or replace.
AIR MNTN Message Inlet Differential Replace inlet filter, check inlet switch.
LO COOL Message
(Water---cooled packages only) Water Pressure Feed Below 10 psig Check cooling water supply (i.e.,
(0.7 bar) closed valves).
(Air---Cooled or Water---Cooled
w/canopy) Fan Motor Overload Tripped Reset after heater elements cool.
5.4D TROUBLESHOOTING --- DS---13
SYMPTOM/MESSAGE PROBABLE CAUSE REMEDY
COMPRESSOR WILL NOT START;
POWER LED OFF Main Disconnect Switch Open Close switch.
Line Fuse Blown Replace fuse.
Control Transformer Fuse Blown Replace fuse.
MOTOR OL Motor Starter Overloads Tripped Reset after heater elements cool down.
Should trouble persist, check whether
motor starter contacts are functioning
properly.
Low Incoming Line Voltage Check voltage. Should voltage check
low, consult power company.
T---1, T---2 FAIL Temperature Transducer Failure Check connections from
transducer. If adequate, replace
transducer.
P---1, P---2 FAIL Pressure Transducer Failure Check connections from
transducer. If adequate, replace
transducer.
E---STOP Emergency Switch Open Close switch (pull).
(depressed)
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