You need to appear in court and ask to get set up on a payment plan. It's generally helpful to come to court with some money to apply towards the unpaid fines. You should also be aware that your license is now suspended because of your failure to pay your fine.
Attorney David Kephart is an experienced Criminal Defense Trial Attorney and Jury Consultant. He is the recipient of the Arizona Attorneys for Criminal Justice President's Award and the recipient of the International Academy of Trial Lawyers Commendation for Excellence in Trial Advocacy. His response to your question is intended to be a general statement of law, should not be relied upon as legal advice, does not create an attorney/client relationship, and does not create a right to continuing email exchanges.
You could also send a letter to the court asking for a payment plan, an order to show cause hearing so you can explain to a judge what happened (it helps if you make substantial payments prior to seeing the judge, or he may toss you in the can), and asking that your warrants be quashed. If you try to do this through the PD they will arrest you and you will wait to see a judge, so I'd try real hard to work something out with the court - first over the phone or by mail (can't arrest a letter), then in person. As my colleague mentions your license is suspended, and you're subject to arrest at any time, so moving quickly is important.
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