As far my knowledge goes, Order Freeze are of two types, i.e. Price freeze and Quantity Freeze.
1. Price Freeze: This occurs if the order is placed with price exceeding the curcuit limits.
2. Quantity Freeze: This occurs when an order is placed with quantity exceeding the maximum permissible limit. For example: Nifty Fut has a maximum permissible order size of 10000 qty or 200 lots per order, in this case if any person places an order with greater than 10000 Qty, say 12000 then it will be frozen by the exchange.