Sullair LS-20S Operator's Manual And Parts List page 44

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