Sullair LS-20S, Operator'S Manual And Parts List

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Section 7
MAINTENANCE
38
7.7 TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM PROBABLE CAUSE REMEDY
HI T1, HI T2 MESSAGE (cont.) Discharge Temperature Exceeded
235
_
F (113
_
C) Because:
Fluid Level in Sump is Too Low Check/correct fluid level.
Thermal Valve Malfunctioned Check/replace thermal valve.
Cooler Fins are Dirty Clean cooler fins.
Water Flow is Low (water--cooled Check cooling water supply (i.e.,
packages only) closed valves).
Water Temperature is High (water-- Increase water flow, lower water
cooled packages only) temperature.
Cooler is Plugged (water--cooled Clean tubes and/or shell -- if tube
packages only) plugging persists, provide cleaner
water.
Temperature RTD Malfunction Check connections from RTD.
If adequate, replace RTD.
HI P1, HI P2 MESSAGE Discharge Pressure Exceeded
Shutdown Level Because:
Unloading Device (i.e., blowdown
Check operation of unloading device
valve, Sullicon actuator, optional See Section 7.5.
spiral valve) failed to operate
Pressure Regulator Maladjusted Check operation of pressure regulator
See Section 7.5.
Solenoid Valve Failed Check operation of solenoid valve
to Operate See Section 7.5.
Control Air Signal Leaks Check tubework feeding control
signal for leaks.
Control Air Signal Filter Clogged Service filter assembly
See Section 7.5.
T1 HI MESSAGE Discharge Temperature Exceeded
225 d F (107 d C) for Pre--Alarm
Discharge Temperature Exceeded
235 d F (113 d C) for Shutdown
Ambient Temperature Exceeded Improve local ventilation (i.e.,
105 d F (41 d C) remote intake of process and/or
cooling air.
Fluid Level in Sump is Too Low Check/correct fluid level.
Thermal Valve Malfunctioned Check/replace thermal valve.
Cooler Fins are Dirty Clean cooler fins.
Water Flow is Low (water--cooled Check cooling water supply (i.e.,
packages only) closed valves).
Water Temperature is High (water-- Increase water flow, lower water
cooled packages only) temperature.
Cooler is Plugged (water--cooled Clean tubes and/or shell -- if tube
packages only) plugging persists, provide cleaner
water.
Temperature RTD Malfunction Check connections from RTD.
If adequate, replace RTD.
P1 HI MESSAGE P1 MAX -- 3psi (.2 bar) Exceeded for
Pre--Alarm
P1 MAX Exceeded for Shutdown
Discharge Pressure Exceeded
Shutdown Level Because:
Unloading Device (i.e., Blowdown
Check operation of unloading device.
Valve, Sullicon Actuator, Optional
Spiral Valve) Failed to Operate