
13
MN-754
Air Lift PerformanceAir Lift Performance
MANUAL Mode
1. MANUAL mode allows the user to ll or exhaust each spring independently. The display
will show arrows above and below the pressures to indicate manual control mode (g. 17).
The arrow will be solid when the spring is lling/exhausting, and outlined when not active.
2. The system detects button press time. For a very short (<0.1sec) duration press, the
system will open the valves for a dened “burst”, changing pressure minimally so users
can ne-tune their pressures. For a longer than 0.1 sec duration press, the valves open
as long as you hold the button down. If a button is held active, the ll/exhaust will time
out after 10 seconds.
• Fill springs: buttons 1 - 4, Exhaust springs: buttons 5 - 8
Troubleshooting Guide
Leak Testing and Detection
Leak detection
1. A leak can be dened as a loss of pressure of more than 5 psi over an 8 hour period. Be
aware that ambient temperature change has an effect on pressure that may seem like
a leak. For example: a change of 10deg Fahrenheit up or down from your baseline will
have an approximate gain or loss of indicated pressure of 2 psi. If a leak is suspected
after including any temperature change, then proceed to #2.
2. Spray soapy water (1/5 Dawn brand dish soap to 4/5 water) on suspect ttings and hose
connections and look for any bubbling caused by air leakage.
3. Fix leaking connection (review pg. 6 for help on NPT ttings and air line connections).
4. Wipe down sprayed connections with rag to remove any residual soapy water.
Dawn brand dish soap will not corrode the metals (aluminum, brass, steel) with which it
comes into contact.
For further technical assistance please contact our customer service department by calling
(800) 248-0892, Monday through Friday. For calls from outside the USA or Canada, dial
(517) 322-2144.
PROBLEM CAUSE SOLUTION
Compressor doesn’t run There is a blown fuse or relay, bad ground, or poor
electrical connections.
Replace the fuse, check the ground wire, or check
the compressor connector
Compressor runs all the time. The compressor relay is defective or there is a leak. Replace the relay or locate the leak and repair.
Air spring or tank leak. Fitting seal or air line is compromised. Check to make sure air lines are seated in connectors.
Inspect ttings with soapy water. Trim hose or re-
seal tting.
Nothing happens when the vehicle is key-on
ignition active
There is a blown fuse or a poor connection. Replace the fuses and check the electrical
connections.
The display does not light up. There is a blown fuse or a poor connection. Replace the fuses and check the electrical
connections.
Compressors runs all the time but doesn’t ll the tank. Compressor in-line check valve fitting has been
overtorqued.
Loosen tting and check again. Replace if needed.
Display shows UNSUCCESSFUL. “Double Click” for Preset not completed within 2
second window.
If display is in sleep mode, click once to “Wake Up”,
then “Double Click” desired preset within 2 seconds
of each press.
Adjust ADJ value or recalibrate system to reduce
number of iterations.
Calibration may need to be adjusted or system may
need to be recalibrated.
Tank pressure settings changed.
Vehicle load changed signicantly. Attempt recalibration.
Air springs/air lines/tank changed.
Display shows PRESSURE SENSOR FAILURE. ECU has detected a pressure sensor operating
incorrectly.
Only manual mode can be used to operate
suspension. Contact customer service immediately
to resolve the problem.
NOTE