1. Check Common Causes of Remote Control Failure

When the wireless remote controller fails, first check the following possible causes:

1.1 Remote Controller Battery Is Empty

A low or discharged battery is one of the most common reasons for remote control failure. Replace the battery or recharge the remote controller before further troubleshooting.

1.2 Check the "Remote / Local Control" Switch

The electrical control box of the concrete pump truck is equipped with a "Remote / Local" operation switch.

Sometimes the switch may be accidentally moved to the "Local Control" position, causing the wireless remote controller to become inactive.

Make sure the switch is set to the "Remote Control" position.

1.3 Check Emergency Stop Switch

If the emergency stop button has been pressed accidentally, all remote operations may stop.

Check all emergency stop switches on the pump truck and release them before testing the remote controller again.

2. Restart the Concrete Pump Truck System

After eliminating the above basic problems, the remote controller itself may have temporary communication or electronic faults.

A simple reset method is:

1. Switch the concrete pump truck to driving mode.

2. Turn off the engine.

3. Restart the engine and test the remote controller again.

If the remote control does not recover after the first restart, repeat the process several times.

In many cases, restarting the system two or three times can restore normal wireless remote operation.

3. Wireless Remote Control Signal Interference

The wireless remote control system used on concrete pump trucks belongs to the category of industrial wireless remote control systems.

Because there are many wireless signals and interference sources in construction environments, signal interference may affect remote control performance.

This problem is especially common at large construction sites where many walkie-talkies, communication devices, and wireless equipment are used at the same time.

Possible sources of interference include:

• Nearby radio communication equipment

• Multiple walkie-talkies operating on similar frequencies

• Strong electromagnetic interference from construction equipment

• Complex construction environments with many wireless devices

When interference occurs, the remote controller may become temporarily unresponsive.

4. What to Do If Remote Control Still Does Not Work

If the wireless remote controller remains inactive after multiple restarts, take the following emergency measures:

Step 1: Switch to Local Control Mode

Move the "Remote / Local Control" switch on the electrical control box to the "Local Control" position.

Step 2: Perform Reverse Pumping (Reverse Operation)

Use the reverse pumping switch located on the small electrical control box near the mixing hopper to operate the pump in reverse.

This helps release pressure and remove concrete from the delivery pipeline.

Step 3: Use Wired Remote Control

If available, connect the wired remote controller to the electrical control box.

The operator can continue operating the concrete pump truck through the wired control system while troubleshooting the wireless remote failure.

5. Emergency Manual Operation When All Controls Fail

If both the wireless remote control and wired remote control fail due to a complete electrical system failure, manual operation of the hydraulic control valve block is required.

Most concrete pump trucks are equipped with manual emergency control devices to handle unexpected situations.

Follow these steps:

Step 1: Remove Concrete from the Hopper

Open the discharge valve below the mixing hopper and release the concrete inside the hopper.

Step 2: Prepare the Delivery Pipeline

Place a water-soaked sponge ball into the end hose of the concrete delivery pipeline.

The sponge ball helps clean and push out remaining concrete inside the pipeline.

Step 3: Operate the Manual Hydraulic Control Valve

1. Manually operate the boom control valve to move the placing boom upward.

2. Adjust the boom to approximately 30° above the horizontal position.

3. Press the reverse pumping button on the hydraulic control valve block.

4. At the same time, press one of the main cylinder reversing buttons.

5. When you hear the hydraulic system making a pressure-loading sound ("squeaking" or pump pressure noise), release the first reversing button.

6. Press the other main cylinder reversing button.

7. Repeat the operation until all concrete inside the pump truck and pipeline is completely discharged.