[Nut-upsuser] problem with output voltage on a mustek ups

[pmjorge at lip.pt]

Hi there

I have a Mustek PowerMust 1000 USB using serial port /dev/ttyS0.
I use nut 2.2.1 with the megatec driver on Debian Lenny (testing),
running on an AMD64 X2.
(I was using a Debian Etch as slave, but to keep it simple I turned it off)


My problem is that sometimes the UPS is running OK, but when the
message "UPS is trimming incoming voltage" appears on knutclient (i.e.
OL TRIM in nut), I have something like

Input Voltage
	241.1
Output Voltage
	202.0
	nominal 220.0 ???

This output voltage is too low! I  think power spikes may be better
than using this voltage.

I don't know if the problem is the UPS or from communication with it.
Can you please help me checking  this? I have search on the web and on
the nut mailing-lists, but I didn't found anything.

Thanks,
Pedro.