Repairing Mecer ME-850 UPS

CommsPlayer

Active Member
Joined
Sep 24, 2013
Messages
97
#1
My Mecer ME-850 UPS stopped working after many years of service. When I switch it on, nothing happens - no lights on the front panel. When I disconnect & reconnect mains supply, no relay clicking noise. Can anyone suggest where I can find the circuit diagram or service manual for this UPS?
Thank you
 

CommsPlayer

Active Member
Joined
Sep 24, 2013
Messages
97
#5
Did you check if your batteries have enough voltage to power it up?
The battery sits at around 10V, so its probably dead. However, surely if one switches on the UPS at least the red mains light should come on? All lights are dead on the front panel when switching it on.
 

CommsPlayer

Active Member
Joined
Sep 24, 2013
Messages
97
#6
The battery sits at around 10V, so its probably dead. However, surely if one switches on the UPS at least the red mains light should come on? All lights are dead on the front panel when switching it on.
Mmm...according to the user manual, no lit lights on the front panel could mean a dead battery...

https://technowave.co.za/img/cms/Mecer/Mecer%20UPS/650-2000VA%20Mecer%20UPS.pdf
 

CommsPlayer

Active Member
Joined
Sep 24, 2013
Messages
97
#7
..and then I took out the battery, the side that faced the transformer is cracked and bulging outwards! I guess I'd need to replace it, hopefully UPS functionality will be restored then.
 

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