Troubleshooting Guide

See below for a list of common questions and troubleshooting topics.

If you can’t find what you’re looking for, contact us.


Venturo Logic Controls (VLC)
Power Up the VLC System
  1. On the right side of the crane’s mechanism, check the receiver’s “OPERATION” diagnostic LED for a slow, blinking, yellow light.
  2. On transmitter, press the “HORN” toggle up button.
  3. Check the receiver’s “RF SIGNAL” diagnostic LED for a slow, blinking, green light.
  4. Check transmitter’s display for home screen.
Will Not Operate

Probable Cause: No Power – Receiver / VCM


  1. Check 30-Pin Plug, #10 for +12V
  2. Trace & check VCM supply pin to terminal block (red)
  3. Check terminal block connection to circuit breaker <CB>
  4. Check connection from <cb> to master disconnect
  5. Check 30-pin plug, ground pin (center)
  6. Trace & check VCM ground to terminal block
  7. Trace & check ground connections from terminal block

Probable Cause: ESCAN Receiver

  1. Check supply connection to <CB>
  2. Check <CB> connection to terminal block (+12V)
  3. Check 28116 jumper connections
  4. Check ground connections

Probable Cause: Transmitter

  1. Locate “Address Learn” button on receiver (See Below)
  2. Simultaneously press the “Address Learn” button while holding the “Ok” button on the transmitter.  After a few seconds, the receiver will learn the RF channels from the transmitter.

VLC Troubleshooting


Probable Cause: Hitting E-Stop Button


  1. Twist E-Stop button clockwise until it “pops up”
  2. Press “Horn” toggle switch UP to start
  3. Observe display for HOME SCREEN

Probably Cause: Lost Communication (>0.5 seconds)

  1. Try re-establishing communiction
    • Walk toward receiver
    • Watch for normal operating screen
  2. Press “Horn” toggle up to reset main contact

Probable Cause: Loss of power to either RX or VCM

  1. See “NO POWER” solutions above
A2B Error

Probable Cause: Tripped compact A2B sensor


  1. Press “OK” button
  2. Lower the load away from compact A2B
Over 80% Load (Reduced Speed - All Functions)

Probable Cause: Load is Greater than 80%

  1. Check load chart for Load-to-Angle
    1. Increase boom angle
    2. Lower load, reposition vehicle, lift with…
      • Shorter boom
      • Increased boom angle
  2. Continue to operate crane at reduced rate (75%)

Probable Cause: Boom angle too low to lift load

  1. See “Load is greater than 80%” solution above

Probable Cause: Boom length too long for lift

  1. See “Load is greater than 80% solution above
Over Error (Reduced Speed - Winch Down, Boom In, Boom Up & Rotate Functions Only)

Probable Cause: Load is greater than 100%

  1. See “Load is greater than 80%” above, solution #1
  2. See “Load is greater than 80% above, solution #2
    • Only the functions below are allowed for solution #2
      • Winch Down (WD)
      • Boom In (BI)
      • Boom Up (BU)
      • Rotate Left/Rotate Right
Out of Level 4.5° - 6.5° (Reduced Speed - All Functions)

Probable Cause: Vehicle out of level

  1. Continue to operate crane at 75% speed
  2. To obtain full speed, see “Out of level > 6.5° ” below
Out of Level > 6.5° (Reduced Speed - Winch Down, Boom In, Boom Up & Rotate Functions Only)

Probable Cause: Vehicle out of level >6.5°

  1. If not in stowed position, stow crane
  2. Turn off crane / VLC system
  3. Completely retract stabilizers / outriggers
  4. Disengage PTO
  5. Disengage parking brake
  6. Reposition vehicle to solid level ground
  7. Engage parking brake
  8. Engage PTO
  9. Deploy outriggers / stabilizers
  10. Turn on crane/ VLC system
  11. Note message on transmitter display
Lost C-A-N Communications

Probable Cause: VCM / Boom Angle Sensor / Level Sensor

  1. Check connections of VCM and sensors
  2. Try re-establishing communication
    • Approach receiver & watch for normal operating screen
    • Press “Horn” toggle up to reset main contact
Pressure Sensor Error

Probable Cause: Pressure Sensor 1 / Pressure Sensor 2

  1. Remove Dins and check connections
  2. Check for hydraulic leaks
Service Crane Boom Stuck Mid-Air
Hydraulic Crane Manual Override

Venturo’s hydraulic cranes are available in two [2] general configurations: Proportional and Non-Proportional. The Non-Proportional configuration (see fig. 1) utilizes a safety shut-off valve which, when not actuated, allows hydraulic fluid to bypass the valve bank and return to tank; the crane will not function when the safety shut-off valve is not actuated. When the safety shut-off valve is actuated (control pendant energizes the coil or the coil is manually overridden), hydraulic fluid cycles through the valve bank and allows the crane to function.  The Proportional configuration utilizes a proportional valve which, in its fully closed and fully opened positions, functions similarly to the safety shut-off valve, but adds the ability to operate the crane at any speed in between these two extremes.
In both the Non-Proportional and Proportional configurations, the four [4] crane functions (winch, rotation, boom elevation, and boom extension) are controlled by four [4] separate valve sections. Each valve section has two [2] solenoid coils (and two [2] manual overrides) which control the direction that the function operates (e.g. winch up vs. winch down). For a given crane function and direction (e.g. winch up), the solenoid coil and the associated manual override lie on the same side of the valve bank (both ‘push’).

Should an electrical failure occur, your Venturo crane can be operated manually. The manual overrides are intended for emergency use only and should not be used for normal operation.

To operate in manual override mode:

  1. Override the safety shut-off or proportional valve by turning the red stem on the valve as stated below:
    • Non-Proportional System For override operation, press stem in and rotate counter-clockwise until it stops. To return to normal operation, press stem in and rotate clockwise until it stops.
    • Proportional System For override operation, rotate stem clockwise (the farther the stem turns, the faster the crane operates). To return to normal operation, roate stem counter clockwise until it stops.
  2. Determine the coil / override associated with the function you wish to operate, then insert a small diameter object (an Allen wrench works well) into the detent on the end of the valve stem and press firmly. For example, pushing the stem labeled ‘A’ on the first bank (refer to illustration in Fig. 1) will actuate winch down.

In the unlikely event that a function of the crane does not stop once the function’s toggle switch is released, the Non-proportional crane can be stopped by simply toggling the power switch to the off (emergency stop) position, and the Proportional crane can be stopped by releasing the trigger.

Electric-Hydraulic Crane Manual Override

Each valve station incorporates [2] hydraulic ports and [2] coils. Manual override shafts are located in the center of the coils (See Fig. 1). Manual override decals are placed on each crane near the valve assembly. These decals provide a visual aid that helps the operator determine the function designations (Reference Fig. 2).

Fig. 1

Fig. 2



  1. Turn Master Disconnect switch to “ON”
  2. Power up the pendant / radio
    • PENDANT – twist EMERGENCY STOP button clockwise
    • RADIO – Press green ON button
  3. On the crane, reference the function you wish to perform using the manual override decal
  4. Using a tool with a diameter of 1/8″ or smaller, press the shaft inward and hold
  5. Reference the functions listed on your pendant or radio (See Fig. 3)
  6. Press the switch or button for the same function
  7. If you need to change function:
    • Release switch or button
    • Remove tool from shaft
    • Go to step 3


Fig. 3