On 000webhost, if your site exceeded your daily cpu limit and your site will be redirected. This is a daily soft limit so the limit will be reset every 24 hours. That mean if your site exceed the limit every 24 hours then your site will get suspend every day.
Here might be some of your reasons why your site exceed daily cpu limit:
. You have too many visitors and over load free server resources.
+ This might cause by crawler crawling your site, use robots.txt to limit the crawlers.
+ If you are using WordPress with lot of plugin your site might be under attack, remove all plugins only keep the one that you are really need.
, If you have many add-on installed, your site take too much resources to run.
. Your script is taking to much server resources to run.
If you don't make change to fix those factors your site will keep getting suspend as soon as your site is un-suspend by the help desk.
If you exceed the more than 20% CPU limit which is a hard limit then your site will be suspended and the only way to get your site back is to upgrade to paid hosting.
Upgrade to paid hosting to avoid this limitation.
Paid hosting has 30 money back guaranty.