The leisure centre, off Greenpark Avenue, was evacuated on Monday night, after overheating cables set off fire alarms.
The loss of power resulted in the closure of the facility for the rest of the evening and all day yesterday.
New parts were sourced and replaced and the facility opened 6.30 am Wednesday morning as normal.
Simon McKenna, chief executive said 'I would like to thank our staff in the prompt and efficient handling of this incident and also many thanks to our customer for their patience and understanding during this time.'
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