Contracor BlastRazor Z-100RC, Operation Manual

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10 CONTRACOR® Version 1.7
6. Troubleshooting
Choking.
If neither abrasive, nor air comes out of the nozzle, relieve pressure and depressurize the
machine, then ensure that the nozzle is not choked. If only air without any abrasive comes
out of the nozzle, fully open the metering valve, and then quickly close and open again
the lower ball valve of the line. If these actions do not help to relieve the pressure in the
machine, open the inspection door and ensure that there is no foreign matter in the tank
(stones, paper, etc.).
Abrasive surges.
During start-up of the machine abrasive surges are normal to a certain degree. However
id abrasive surges continue, you should stabilize the abrasive flow by quick closing and
opening of the line lower ball valve. Abrasive surges often result from elevated moisture
content in compressed air system. Installation of additional moisture and oil separator can
solve this problem.
Wet abrasive removal.
To remove wet abrasive from machine tank you should disconnect the blasting hose and
remove rubber gaskets at machine hose coupling. Then you must fully open the metering
valve and close the lower ball valve in the machine compressed air line. With such valve
configuration compressed air will only enter the machine tank and press wet abrasive out of
the tank.
6.1 RC system troubleshooting
The following list of checks can be used for determining problems in case the RC system
does not function properly:
1. Study RCV User Manual
2. Visually check all air hoses and connections to ensure that there are no air leaks.
3. Ensure that the safety and drain valve are closed.
4. Check the RC handle for air leaks:
— when the key is not depressed, the air should come only out of the body vent.
— when the key is depressed no air should come out of the handle.