HVAC fault diagnosis and repair in Rubí
On-site diagnosis and repair of HVAC and refrigeration faults in industrial units, offices and public facilities in Rubí, with or without a maintenance contract.
An HVAC fault in Rubí can mean an office that is unusable in mid-July, a production area that cannot be occupied or a cold room that is losing temperature. This service is for maintenance managers of industrial units, building managers and heads of facilities who need to know what has failed and to have it properly fixed, whether or not they have a maintenance contract with MRS Climatización.
Faults brought on by the inland heat
Rubí's summers, without the influence of the sea, put outdoor units through long hours of running in hot air. Faults in this season follow a recognisable pattern:
- High-pressure trips at midday on rooftop units with dirty coils or weakened fans.
- Compressors stopping on thermal protection after several consecutive hot days.
- Units that run but cannot reach the set point because they are at the limit of their capacity.
- Condensate drains overflowing when the unit runs without a break.
Some of these faults give warning before the summer. That is why, when the same unit fails at the same time every year, the repair should come with a review of the preventive plan.
When the use of the unit has changed
On the town's industrial estates, units often change activity or tenant: a warehouse becomes a workshop, a production area is converted into offices, new machinery adds heat. The original HVAC was sized for another use, and what looks like a fault may be a healthy unit that is simply no longer enough. The diagnosis has to tell the two apart, because replacing components on a unit that is not faulty solves nothing. It is also common for equipment added over the years to share panels and protective devices that were not reviewed when the installation was extended; since MRS also works on electrical installations, this part is measured during the same visit.
Industrial refrigeration and process cooling
In plants that depend on cold rooms or process cooling, a fault directly affects the product or the production line. The diagnosis covers the refrigeration circuit, defrost, fans and controls, and priority is set according to the impact on the operation.
How the visit is organised
The visit is prepared at MRS's production and warehouse base in Sabadell, a short drive from Rubí. With the make, model and alarm codes, tools and likely spare parts are selected before setting off. On site, the technician measures pressures, temperatures and electrical consumption and, where possible, repairs the fault on the same visit; if a part is needed, it is planned according to the equipment and its availability. Office hours are Monday to Friday, 9:00 to 18:30, and out-of-hours repairs can be arranged in advance. The general workings of the service are described on the HVAC fault diagnosis and repair page.
What to send when reporting the fault
- Address, site access and an on-site contact person.
- A photo of the unit's rating plate and of any alarm codes.
- Whether the fault coincides with the hottest hours, with machinery starting up or with any recent change in the unit.
- The impact on production, on the product or on occupants.
If faults keep recurring, a maintenance contract in Rubí lets you set priorities in writing. And if the diagnosis points to replacement, the HVAC installation in Rubí page explains how the project is approached.
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Frequently asked questions
Do you take on one-off repairs in Rubí without a maintenance contract?
Yes. MRS accepts one-off repairs for clients without a contract. Give us the address of the unit or building, the affected equipment and the symptoms, and the diagnostic visit is organised from the Sabadell base. If the fault turns out to be recurring, you can then consider adding the equipment to a maintenance plan.
Our rooftop unit shuts down in the hottest hours. What does that usually mean?
Often a high-pressure trip: the condenser cannot reject enough heat when the outdoor air is at its hottest. Common causes are dirty coils, fans that do not reach full speed, an overcharge of refrigerant or a unit that is already working at the limit of its capacity. Measurements taken at the time of the fault help tell them apart.
Can you carry out repairs outside the plant's operating hours?
Yes, if arranged in advance. Office hours are Monday to Friday, 9:00 to 18:30, but when a repair requires stopping equipment that serves production, it can be scheduled at night, during a shift change or at the weekend, coordinated with the plant manager.
What happens if the fault affects a cold room?
The whole circuit is diagnosed: evaporator, defrost, fans, compressor, pressures and control panel. In the meantime, keep door openings to a minimum and monitor product temperature. If a spare part is needed, it is planned according to the equipment and its availability, and possible temporary measures are discussed.
We have changed the activity in our unit and the HVAC cannot keep up. Repair or replace?
The first step is to confirm whether there is a fault or whether the unit is working correctly but was sized for a different use. Measurements and the new heat load show whether a repair or adjustment is enough, or whether a replacement should be studied. In that case, it is approached as a small installation project.
Describe the fault in Rubí
Tell us the address, the equipment, any alarm codes and whether the fault affects production, so the diagnosis can be planned.
Report a fault