My colleague is correct, there has to be a contempt motion and then a warrant for arrest can issue. The DA can also refer the matter to the criminal division for felony failure to pay, but that doesn't do any good when the person doesn't live in that jurisdiction. The problem with out of state persons and those who move frequently is that the system lacks the resources to chase them and jailing them doesn't get the arrears paid.
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The state doesn't just jail people, nor can it.
A motion needs to be brought to hold him in contempt, and *then* he can be jailed. If served with the order to show cause to appear on such a matter, and he does not, a warrant can issue.
Either private counsel or the DA FSD can file the motion.