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Hello.

One of my CT20 does not allow the LP 1500 to start. The countdown goes from 9 to 0 and stands there.

What could be the error on the CTL20 ? Should it be the backup battery ? The two circuits protectors (CP) are OK.

1. How to recharge Sanyo Backup on CTL20 Board ? 

2. How to replace Sanyo Backup battery on CTL20 board ? Can I just remove it compmetlu and replace the same way like a condenser ?

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