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26-11-2013, 07:27 PM #1
mitsi heavy centralised controller issues
greetings
customer has a vrf system with no local remote controllers-1 centralised scsl3na-ae
approx 18mth old- software version 3.10e
checked the time schedules and all the kit has to start up at 1am as the building fabric is poor- high ceiling void- uninsulated ceiling tiles
monday,tues morning- staff say controller locks up- touching the screen doesnt light up- they have to remove the front cover and reset it on the rocker switch- im going to site again tomorrow at 7am to hopefully see this
ive checked connections on the back of controller,comms ok
previously when this happened they installed a ups to ensure power to the controller as they think it could be mains incoming issues- media city is 300yrds away so probably the bbc zapping al the leccy
when it resets the time/date is correct- it times out for 240 secs whilst it reboots
feel free to suggest
oh and no fault codes stored- all works ok once rebooted
ps i didnt fit itLast edited by install monkey; 26-11-2013 at 07:28 PM. Reason: additional info
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26-11-2013, 10:50 PM #2
Re: mitsi heavy centralised controller issues
found operation manual states it could be electrostatic discharge- would wrapping the power supply 3 times around a ferrite core fix this?
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27-11-2013, 07:30 AM #3
Re: mitsi heavy centralised controller issues
Typical- on site all working!
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27-11-2013, 10:39 AM #4
Re: mitsi heavy centralised controller issues
Whats the system? All indoor and outdoor units same series? SL1 or SL2?
The controller may overheat due to the lack of air circulation.Last edited by RusBuka; 27-11-2013 at 10:44 AM.
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27-11-2013, 07:31 PM #5
Re: mitsi heavy centralised controller issues
hi ruskbuka - controller is in a plastic enclosure- it is warm inside- but not toasty
all indoors are same series- think its a kx4 outdoor- comms line isnt grounded at the controller has run all day ok, suspect the comms line and the mains flex in the wall is causing problem- if it comes in again then ill run the comms externally to see if that cures it