The excussion shall not take place:
(1) If the guarantor has expressly renounced it;
(2) If he has bound himself solidarily with the debtor;
(3) In case of insolvency of the debtor;
(4) When he has absconded, or cannot be sued within the Philippines unless he has left a manager or representative;
(5) If it may be presumed that an execution on the property of the principal debtor would not result in the satisfaction of the obligation. (1831a)