24/7 Emergency Service

When you need help fast, ONI is there for you. With a 24/7 service hotline, a global service network, and remote support capabilities, we provide reliable assistance for critical malfunctions and urgent service requests. Additionally, dedicated contact channels are available for general inquiries.

Learn more

Our 24/7
service number:

Phone: +49 2266 4748-999
Email: support@oni.de

Maintenance

In an emergency: ONI

When every minute counts

Designed as an emergency service. Available around the clock, every day of the year, and with direct access to experienced service teams, ONI creates the conditions necessary to respond quickly in the event of a malfunction and keep downtime to a minimum.

After all, technical malfunctions cannot be planned—but their impact on processes, deadlines, and productivity can often be limited. What matters most is having a reliable point of contact at your side at the right moment, someone who can quickly assess the situation and coordinate the next steps. ONI provides clear procedures, short response times, and a service organization prepared for urgent situations. This ensures that companies receive support exactly when quick decisions and targeted action are needed.

That’s why you should choose ONI

24/7 Emergency Hotline

Worldwide, around the clock, and every day of the year

The ONI service team is available 24/7 for emergencies—worldwide, around the clock, and every day of the year. This ensures that a direct line of contact is always available in the event of a malfunction. For general questions, there is also a separate customer service contact available during regular business hours.

On-site immediately: Service calls when speed is of the essence

At ONI, reliable service doesn’t end with the handover of a system. Especially in the event of malfunctions, it is crucial that support can be organized quickly and implemented with technical expertise. To this end, ONI relies on its own service network and a service organization designed for short response times and practical assistance. Customers in Germany and many other countries expect comprehensive service that not only supports ongoing operations but also steps in when immediate action is required.

In this way, ONI creates the conditions necessary to ensure that problems can be quickly assessed, necessary measures coordinated, and service calls dispatched promptly. This provides operators with additional peace of mind in their daily operations and helps minimize downtime and its consequences in the production environment.

Your benefits

Why Choose ONI

Comprehensive
system solutions


ISO-certified

Assistance
with applications

24/7 service
worldwide


Over 40 years of experience

Patented
efficiency technologies

Financial stability
through CrefoZert

International
recognition

Our customers

These customers already trust us

Still undecided?

ONI Solution Overview: Service & Maintenance

24/7 Emergency Service

With ONI’s Emergency Service, you receive support at any time. Reliable, fast, and professional—for peace of mind in critical situations.

Go to Emergency Service

Refrigeration System Maintenance

With ONI, you can count on professional refrigeration system maintenance with scheduled inspections, reliable upkeep, and fast service—for maximum uptime and consistently lower operating costs.

About Refrigeration System Maintenance

Rental Cooling

With ONI’s rental cooling, you can ensure flexible and rapid cooling—ideal for bridging gaps during outages, maintenance, or peak loads.

About Rental Cooling

Monitoring and Spare Parts Requests

ONI supports you with reliable monitoring and fast spare part requests—for early fault detection, short response times, and maximum system availability.

Go to Monitoring
Go to Spare Parts Requests