A man extradited from Queensland to face charges over two alleged armed robberies has been refused bail.

Darron Jarochowicz, 47, was arrested at Robina Hospital - where he had been living in the mental health unit according to a court order - and extradited to the ACT in June.

He appeared in the ACT Magistrates Court on Tuesday to face charges of aggravated robbery, theft, riding in a stolen car and arson.

The court heard Jarochowicz is accused of two armed robberies in 2005 and 2007.

A statement of facts, tendered in court, alleged Jarochowicz threatened staff with a screwdriver when two men robbed the Hackett IGA supermarket in March 2005.

The men fled in a stolen car with about $500 and DNA recovered by police from the scene allegedly linked Jarochowicz to the incident.

Jarochowicz is also accused of threatening staff at the Capital Chemist, in O'Connor, with a rusty machete before making off with more than $10,000 of cash and drugs in May 2007.

A burnt out stolen Ford Laser was recovered in Acton hours later by police.

A police informant told the court the defendant had confessed to the 2007 raid to police in November 2009, but was not charged due to lack of evidence.

The informant said Jarochowicz moved to Queensland in 2011 and was returned to the capital to face the charges when fresh DNA evidence was uncovered.

Jarochowicz formally entered pleas of not guilty to all charges and applied for bail on Tuesday.

But the prosecution opposed his release, arguing he was a flight risk and could commit further crime if granted conditional liberty.

Prosecutor Anthony Williamson said the allegations were serious crimes that could warrant a jail sentence if proven.

He argued the defendant had no links to the territory and had a history of disregarding court orders.

But defence lawyer Jacqueline Agius said her client could not receive the proper mental health treatment while detained in the Alexander Maconochie Centre.

Ms Agius said her client had been snatched from a facility where he had been receiving treatment, brought to Canberra and held in custody.

She argued it would have been better to leave Jarochowicz in Queensland than locked in a cell for 23 hours a day.

Chief Magistrate Lorraine Walker denied Jarochowicz bail and remanded him to reappear next month.