STEMCO Aeris Inflation System Troubleshooting - Manual (Page 9)

Aeris System Troubleshooting
Sept 2013
Page 9 of 18
Condition Possible Causes Actions
The Driver Warning Lamp is
ON.
(See Aeris System Function
Test on Page 10
If NO Leak is Found)
The system is delivering air during initial
system charging for a slow leak on tire of 2-3
psi The system is functioning correctly.
The system is delivering air to a leaking tire. Repair the tire.
The system is delivering air to a leaking
system component. Repair the system component.
The system wiring is incorrect. Correct the system wiring.
Lamp circuit board is defective Replace control box
The Driver Warning Lamp is
flashing ON & OFF
(See Aeris System Function
Test on Page 10
If NO Leak is Found)
The system is delivering air to a tire with a
fast leak of 4-6 psi or more. The system is functioning correctly.
The system is delivering air to a leaking tire
at 4-6psi or more. Repair the tire.
The system is delivering air to a leaking
system component. Repair the system component.
The system wiring is incorrect. Correct the system wiring.
Lamp circuit board is defective Replace control box
The Driver Warning Lamp is
ON and air is leaking from the
wheel-end hubcap or Axle
vent The system is delivering air to a leaking
system component. Repair the system component.
The delivery hose in axle is damaged Replace DOT 1/4" airline in axle tube
Hubcap RUA has face seal leaking Replace hubcap assembly
Hose seal or gasket defective Replace hose or install new seal
The Driver Warning Lamp is
OFF during system operation
(See Aeris System Function
Test on Page 10
If Power & Ground Supply to
Trailer is good)
The trailer is not supplied with 12-volt power
or ground Supply 12-volt power & ground to the
trailer.
The Driver warning lamp is inoperative. Replace the Driver warning lamp.
Lamp circuit board is defective Replace control box
The system wiring is damaged. Repair the system wiring.
The system wiring is incorrect. Correct the system wiring.
Tire pressure is low
(See Aeris System Function
Test on Page 10 for
Troubleshooting)
The shut-off valve is off. Turn on the shut-off valve.
The system pressure setting is too low. Increase the system pressure setting at
Control box regulator
Defective pressure protection valve in air
tank Replace Pressure protection valve
Kinked or Damaged 1/4" air line to wheel
end Repair 1/4" air line to wheel end position
that is not getting air supply.
The incorrect valve cores are installed or
damaged hose check valve. Replace hose assemblies
Lubricant is leaking from the
wheel-end vent. The wheel end is overfilled with lubricant. Fill the wheel end to the correct level.
Tire pressure is high. The tire is manually over inflated. Reduce the tire pressure. The system will
inflate to the correct level.
The system pressure setting is too high. Lower the system pressure setting at
control box regulator.
The trailer tire deflates when
parked. The system hose or tire valve stem
connection is leaking. Correctly tighten the connection or replace
the seals.
The hose valve core is leaking. Clean or replace the hose valve core.
The tire is leaking. Repair the tire.