This was originally posted on APC forums on 7/6/2009
Hi,
I am using an international Yamaha digital Piano that has a selectable voltage switch. The four voltage positions are 110, 127, 220, and 240 volts.
My home voltage in Nevada as confirmed with a meter nominally runs at 122 volts.
I purchased an APC Line-R 1200 with user selectable input voltages of 110, 120, and 127 volts to see if I could better control the voltage into the piano.
I set the input voltage to 127 volts, to match the piano's 127v position, however, the output from the Line-R remains at 122 volts, no voltage boost. The Line-R voltage display on the front displays "green" normal and the piano works fine. Will the slightly lower output voltage from Line-R harm the piano?
I also tried setting the input voltage to 110 volts on the Line-R. In this mode the unit does in fact step down the voltage to 110 volts (confirmed by meter) however, a yellow light appears on the front indicating high input voltage. The piano now receiving spot on input voltage with it's selector switch set to 110v. I guess my question is this, will it hurt to have the Line-R run in it's corrective state for a long period of time? The unit is running very cool and all appears to be normal other than the yellow light indicating high input voltage.
Lastly, is it a problem to just set the Line-R to 120 volts and set the piano to 110 volts? I am a little worried of running 122 volts into a 110 volt transformer.
Thank you, just trying to protect a $3500 piano.
Message was edited by: Zeke77
Message was edited by: Zeke77