You didn't get the BLEED LO TEMP caution because WAI wasn't switched on.
This low temp phenomenon happens when the fan air valve is stuck open and thus cooling bleed air to the max.
The PFR will usually show a fan air valve thermostat or bleed sense line error.
Cold bleed air is not an issue for the packs, so no caution is thrown up if wing anti ice is not required. This is why it's a good idea to keep monitoring system pages regularly.