Unless you have the original program file to reload, your chiller or rack will become a brick. Do not do this.
You are on-site, the system is flashing an alarm, and the interface is asking for a password. You try the defaults, but nothing works. The manual is missing, and technical support is closed. This scenario is all too common. carel pco5 controller password
Here are the most common default passwords for a at the Service level: Unless you have the original program file to