# Troubleshooting and Alarms

The tables below describe different situations, problems and alarms with corresponding possible cause and solutions. The alarms will show an alert with a code on the hand controller for taking corrective actions.

Alarm | Possible cause | Solution
--- | --- | ---
Pump motor oil temperature high alarm | Oil temperature inside the pump is above the permissible temperature due to different reasons: Continuous working | Leave the pump idle to let it cool down for few minutes.
Oil quality | Check for contamination. Change the oil.
External temperature | Change the oil to appropriate grade.
Pump motor oil level low alarm | When the oil level inside the pump is below the minimum level, the system stops. | Top up oil in the pump to resume the work.
Leakage in the system | Check for leakage in the system, then repair or replace.
Pump motor protection alarm | Heavy current or unusual power activity inside the motor. This alarm is triggered for safety of electronics and electrical parts connected to the motor. | Open the small front window on the pump. Reposition the black knob to I position resumes the power supply to the motor. If the error repeats, check the main electrical supply.
Tool communication disturbance | Overcurrent flowing for an excessive period of time is the most common. This alarm is triggered for the safety of the electronics and electrical parts within the electrical enclosure. | Open the small front window on the pump. Rearm the circuit breaker to resume work. If the breaker keeps tripping within seconds of the rework, stop the work and take corrective actions. Check the power supply. Check that power cables are not damaged or broken. Check that electrical connections are not damaged or broken.
An electrical short circuit.
An electrical ground fault.

Problem | Possible cause | Solution
--- | --- | ---
Tensioner stuck on the bolt after tensioning | Low charge level of the battery nutrunner. | Replace the battery of the nutrunner with a charged battery.
No gap between the wall and the tensioner. | Check the wall clearance at the back of the tensioner. If no gap, de-tension the bolt by using the manual mode.
Hole alignment, lubrication and bolt threads. | Check also the hole alignment, lubrication and bolt threads. If any doubts, change the bolt and try again.
Tensioner does not run down on bolt | Bolt threads are damaged. | Replace the bolt.
Bolt threads are not lubricated. | Lubricate bolt threads.
Debris inside the tensioner threads. | Remove debris from the threads with a wire brush.
Bolt protrusion exceeds the maximum limit. | Adjust the protrusion by loosening the bolt so that it does not exceed the maximum limit.
Pressure not building over 200 bar in the pump | Leakage on the pump. | Check for leakage on the pump or in the hydraulic line of the system. Check the oil level. Top up with oil if too low. Send the pump for maintenance or repair if the problem persists.
Wrong grade of oil. | Make sure to use the right grade of oil.
Hard to disconnect hydraulic line coupler from the pump | The nipple on the hose is worn out. | Change nipples on the hose and tensioner as soon as it becomes sticky and harder to disconnect.

## Applies to: