Are the angels infallible or fallible?

According to fakhr Razi, in his interpretation of a verse of Surat at-Tahrim: > Angels obligated to responsibilities in afterworld just as humans are responsible in the world. The disobedience of angels means that they are disagreement with Allah's commandment and prohibition. (fakhr Razi, volume 30, p.46, Tafsir Kabir) If we accept this commentary, can we also believe that the angels are infallible? In other words, how can one reconcile between the disobedience of angels on one hand and also their infallibility on the other hand?