What actually the initial log lines means?

I found the below lines logged in comsol.

Time-Dependent Solver 1 in Solver 1 started at 19-Jan-2016 06:54:18.
Time-dependent solver (BDF)
Number of degrees of freedom solved for: 346770.
Nonsymmetric matrix found.
Scales for dependent variables:
mod1.u: 1e+005
mod1.T: 3.9e+004
mod1.p: 3.5e+003

My initial conditions are: T = 420 K, v=0 m/s

My boundary conditions are: T =370 K, v = 0.25 m/s

But the values of mod1.u and mod1.T are very high and it doesn't have any unit.

So can anybody explain what actually the initial log lines means?