Quick answers
What this page covers
Starting problems may be caused by the power supply, vehicle, fuses, relays, controller, fans or refrigeration system protection functions.
What exactly happens?
For diagnosis, it is important to know whether the system does not respond at all, starts briefly then switches off, or whether individual components fail to start.
- The controller remains off or displays a message.
- The compressor does not start despite a demand for refrigeration.
- The evaporator or condenser fans fail to start.
- The system starts briefly, then switches off again.
Useful details for the workshop and Kerstner
The more precisely the sequence is described, the fewer follow-up questions are needed. Comparing operation while driving, stationary operation and optional mains power is particularly useful.
- Refrigeration unit/equipment type and serial number.
- Operating mode: driving, stationary refrigeration or 230-V supply.
- Battery condition, visible warnings and error codes.
- Photos of the controller, fuse area, rating plate and system.
What operators should not do themselves
Visual checks and documentation are useful. Work on the refrigeration circuit, high-voltage system, electrical components or protection circuits should only be performed by qualified professionals.
- Do not bypass safety functions.
- Do not test or replace electrical components without the required qualifications.
- Do not open refrigerant lines.
- Do not continuously force operation if the system repeatedly shuts down.
Relevant next steps
Frequently asked questions
Frequently asked questions on this topic
What should I do if the refrigeration system will not start?
Note the operating mode, controller display, error messages, outside temperature and whether individual components can be heard starting. Check only simple operating and visual points, then report the case with a rating plate photo and serial number.
Why does a refrigeration system switch off again after a short time?
Possible reasons include protection functions, power supply, pressure or temperature conditions, fan problems or electrical components. A qualified workshop should identify the precise cause.
What details does Kerstner need for technical assistance?
Useful details include the unit type, serial number, VIN, registration number, operating mode, error code, a brief fault description and photos of the rating plate, controller and installation.