Troubleshooting Guide- Supervisor - Sullair LS-25 Operator's Manual And Parts List

Section 7
MAINTENANCE
7.7 TROUBLESHOOTING GUIDE- ELECTRO-MECHANICAL (CONTINUED)
SYMPTOM
COMPRESSOR WILL NOT BUILD
UP FULL DISCHARGE PRESSURE
LINE PRESSURE RISES ABOVE
CUT-OUT PRESSURE SETTING
ON PRESSURE SWITCH
EXCESSIVE COMPRESSOR FLUID
CONSUMPTION
PRESSURE RELIEF VALVE OPEN
REPEATEDLY

7.8 TROUBLESHOOTING GUIDE- SUPERVISOR

SYMPTOM
COMPRESSOR WILL NOT START:
POWER LED OFF
48
PROBABLE CAUSE
Air Demand is Too Great
Dirty Air Filter
Pressure Regulator Out of Adjustment
Defective Pressure Regulator
Leak in Control System Causing
Loss of Pressure Signals
Defective Pressure Switch
Defective Pilot Valve
Defective Blowdown Valve
High Pressure Shutdown is Defective or
Adjustment is Incorrect
Plugged Control Line Filter
Clogged Return Line or Orifice
Clogged Return Line or Orifice (cont.)
Separator Element Damaged or Not
Functioning Properly
Leak in the Lubrication System
Excess Fluid Foaming
Fluid Level Too High
High Pressure Shutdown Switch is
Defective or Out of Adjustment (135 psig
[9.3 bar])
Defective Pressure Relief Valve
High Separator Element
Differential
PROBABLE CAUSE
Main Disconnect Switch Open
Line Fuse Blown
Control Transformer Fuse Blown
Check service lines for leaks or open valves.
Check the filter indicator and change or clean ele-
ment if required.
Adjust regulator according to control adjustment
instructions in the Maintenance section.
Check diaphragm and replace if necessary
(kit available).
Check for leaks.
Check that diaphragm and contacts are function-
ing properly and are not damaged. Replace if nec-
essary.
Check that Sullicon Control lever is moved to un-
load stop when the pressure switch contacts open.
Repair or replace if necessary (kit available).
Check that sump pressure is exhausted to the at-
mosphere when the pressure switch contacts
open. Repair or replace if necessary (kit avail-
able).
Readjust or replace.
Clean or repair if necessary.
Clean strainer (screen and o-ring replacement kit
available).
Clean orifice.
Change separator.
Check all pipes, connections and components.
Drain and change.
Drain excess.
Readjust below pressure relief valve setting of 150
psig (10.3 bar) or replace.
Replace pressure relief valve.
Pressure Change separator elements.
Close switch.
Replace fuse.
Replace fuse.
REMEDY
REMEDY