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    How to learn in additional siren HSA6400

    I am having trouble learning in a new, additional siren. My system has been installed for a few months now and working fine. I have tried following the instructions but can't find anything explicitly about installing an additional siren to an existing sysem. Any ideas please?
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    Yale 6400 query

    This morning I set the alarm at the control panel , went out , returned and waited until the alarm sounded. I incorrectly entered the code twice because of the noise/confusion of the alarm and then realised you are right in that I may have done the same previously, but that doesn't explain why...
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    Yale 6400 query

    The only device working as entry is the door contact on my front door, and I definitely didn't open that. The alarm was activated by a PIR in the living room downstairs, which is on the home/away circuits. I will set the alarm with the fob later today, then deliberately start an alarm by...
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    Yale 6400 query

    I did set the alarm with the keyfob and I did stop the alarm souding with the keyfob. I know that it states in the instructions that it's not possible to do that. I understand what you say about making errors but I'm pretty sure I inserted the correct code. I will test it on another day, as...
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    Yale 6400 query

    I set the alarm to home only using the key fob. I came down this morning but forgot to switch the alarm off using the keyfob. The alarm sounded and I tried to switch it off at the control panel but it would not switch it off. I pressed the green unlock key and then inserted the code, several...
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    do I need to have the system flushed?

    Thanks for your post. The toilet rad looks OK-spot on aim every time.
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    do I need to have the system flushed?

    Thanks for the reply. Yes, I'm sure it was added because I saw him do it. He also left me the leaflet - it was Fernox 290ml Superconcentrate. I also saw the plumber flush the radiators and he showed me at the time that the water was clean when it came out after over 20 years of use. The rads...
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    do I need to have the system flushed?

    I had a new combi boiler fitted two years ago, using existing radiators. There was no problem with the radiators at the time. The bathroom rad started leaking-it had corroded at the bottom and it is now disconnected and the pipes to it are capped.The system is working fine. When the rad is...
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