Section 9
COMPRESSOR MAINTENANCE
AND TROUBLESHOOTING
35
9.8 TROUBLESHOOTING--COMPRESSOR (continued)
SYMPTOM PROBABLE CAUSE REMEDY
T1 HI Message (continued) Temperature RTD Malfunction Check connections from RTD.
If adequate, replace RTD.
P1 HI Message Discharge Pressure Exceeded
Shutdown Level Because:
P1 MAX---3psi (0.2 Bar) Exceeded
for Pre --- Alarm
P1 MAX Exceeded for Shutdown
Unloading Device (i.e., Blowdown Check operation of unloading device.
Valve, Inlet Control Valve) Failed to
Operate
Pressure Regulator Maladjusted Check operation of pressure regulator.
Solenoid Valve Failed Check operation of solenoid valve.
to Operate
Control Air Signal L eaks Check tubework feeding control signal
for leaks.
Control Air Signal Filter Clogged Service filter assembly.
Dryer Evaporator Iced Up Consult Dryer Troubleshooting Section.
SEP MNTN Message Plugged Separator Replace separator elements.
dP1 > 10 psi Check P1 & P2 pressure transducers.
COMPRESSOR DOES NOT Air Demand Exceeds Supply C heck air service lines for open
BUILD FULL DISCHARGE valves or leaks.
PRESSURE
Inlet Air Filter Clogged Check for maintenance message on,
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 trans---
at Fault ducer. If adequate, replace trans---
ducer.
LINE PRESSURE RISES ABOVE Pressure Sensor P2 at Fault Check connections from trans---
UNLOAD SETTING ducer. If adequate, replace
transducer.
Unloading Device (i.e., Blowdown Check operation of unloading device.
Valve, Inlet Control Valve) Failed
to Operate
Solenoid Valve Failed Check operation of solenoid
to Operate valve.
Control Air Signal Leaks Check tubework feeding control
signal for leaks.
EXCESSIVE FLUID CONSUMPTION Damaged or Improperly Gasketed Inspect separator elements and
Separator Elements gaskets. Replace if damaged.
Fluid System Leaks Check tube/pipework for leaks.
Fluid Level Too High Drain excess fluid.
Excessive Fluid Foaming Drain and change fluid.
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