It's most likely related to high default rates at the school - historically, expected, or both - and the resulting sanctions from the Dept. of Education.
QUOTE
If an institution has cohort default rates of 25 percent or more for the three most recent years, students
attending the institution will not be eligible for Federal Stafford Loans and Federal Pell Grants for the
remainder of that fiscal year and the following two fiscal years.
In an institution has a cohort default rate of 40 percent or more for one year, students attending the
institution will not be eligible for Federal Stafford Loans for the remainder of that fiscal year and the
following two fiscal years.
For instance, I briefly attended a CC that offered Pell grants and state grants, but no federal loans. This had been their practice for several years at least, more than just the three years or so that would have come from the latter sanction above. I'd guess that they had experienced and expected high default rates and stopped offering federal loans in an attempt to continue being eligible for Pell grants.