Chiller Maintenance & Repair in Dubai
Maintenance, repair and compressor overhauls for air-cooled and water-cooled chillers, whether scroll, screw or centrifugal, in Dubai offices, hotels, warehouses and process plant. Every visit is logged. You get a fixed-price written quote and a 6-month workmanship warranty.
Recent chiller maintenance jobs
A cross-section of chiller work Samra has closed across Dubai — compressor overhauls, condenser barrel repairs, and pump/strainer service.
Chiller maintenance and repair for commercial and process plant
Samra Facilities has handled chiller maintenance in Dubai since 2019 for building owners, facilities managers and plant operators who run their own chilled-water plant rather than district cooling. We maintain and repair air-cooled and water-cooled machines, from 10 TR scroll packages to centrifugal plant above 200 TR, on planned visits and on breakdowns.
Every visit logs pressures, temperatures, approach, amps and oil condition and compares them with the last visit and the manufacturer's data. A fouling condenser or a wearing compressor shows up in those numbers months before it trips. Chargeable work is always quoted at a fixed price in writing first.
Commercial or industrial chiller: what changes in the maintenance plan?
The refrigeration cycle doesn't change. The duty, the tolerance for downtime and the window we get to work in all do.
| Commercial comfort cooling | Industrial and process cooling | |
|---|---|---|
| Typical sites | Offices, hotels, retail, mixed-use towers | Moulding, food and beverage, printing, labs, server rooms |
| Load pattern | Follows occupancy and weather, peaking July to September | Follows production, often 24/7 |
| Cost of a trip | Warm floors, tenant complaints | Scrapped product, a stopped line |
| Working window | Nights, weekends, low-occupancy periods | Planned shutdowns, standby-chiller rotation |
| Extra checks | Comfort complaints traced back to the plant | Glycol strength, process-side contamination, redundancy tests |
On process plant we agree the shutdown sequence with the production lead and, where there is a standby machine, rotate duty so the line keeps running. Glycol circuits get a concentration check on every visit, because diluted glycol at a low setpoint is how evaporators freeze.
Air-cooled and water-cooled chillers: where each one fails
Air-cooled chillers
Scroll machines run from about 10 to 200 TR and screw machines from about 80 to 500 TR, usually on a roof or in a service yard. The condenser coil is the weak point. Sand and fine dust pack into the fins, head pressure climbs, and the chiller trips on high pressure on the hottest afternoons. We clean coils from the inside out with low-pressure water and a coil-safe cleaner, and check fans and fins for damage and corrosion.
Water-cooled chillers
Screw machines run from about 100 to 500 TR and centrifugal plant from about 200 TR upwards, with a cooling tower outside. They are more efficient but have more to go wrong. Tubes scale, strainers block and pumps wear, at a pace set by the tower's water chemistry. We track tube condition through the condenser approach temperature and brush the tubes when the trend calls for it.
Scroll, screw and centrifugal compressors
| Compressor | What we monitor | Repair route |
|---|---|---|
| Scroll (air-cooled packages, often in tandem or trio sets) | Amps per compressor, superheat, crankcase heater, contactors | Hermetic, so replaced rather than rebuilt, with an acid clean-up after a burn-out |
| Screw (mid to large plant) | Oil pressure and filter differential, oil separator, slide valve, vibration | Semi-hermetic and open screws can be overhauled |
| Centrifugal (large water-cooled plant) | Bearing and oil temperatures, guide vanes or VFD, purge unit on low-pressure refrigerants | Bearing, seal and oil-system work on site. Major overhauls run as a planned shutdown |
Oil-free magnetic-bearing centrifugals, such as Smardt machines built around Danfoss Turbocor compressors, have no oil to sample. On those we trend the bearing controller and drive data instead.
Chiller maintenance schedule: daily, monthly, quarterly and annual
This is the schedule we start from. The final version follows the installation, operation and maintenance (IOM) manual for your model and the plant's run hours. Trane's CenTraVac manual, for example, calls for daily logs, strainer cleaning every three months, an annual oil analysis and a tube test every three years.
| Frequency | Tasks | Who does it |
|---|---|---|
| Daily log | Chilled-water and condenser-water temperatures (or ambient on air-cooled plant), suction and discharge pressures, oil pressure and level, compressor amps, alarms since the last reading | Site operator or BMS trend, reviewed by us on each visit |
| Monthly | Log reviewed for drift, leak and oil-stain check, air-cooled coil inspection, condenser-water treatment test, strainer pressure-drop check | Site team, or Samra under contract |
| Quarterly | Superheat, subcooling and approach temperatures logged, charge and leak check, compressor amps and oil acid test, air-cooled condenser clean, safety devices trip-tested, control board diagnostic, vibration check, strainers cleaned | Samra planned visit |
| Annual | Shutdown inspection, oil sample sent for lab analysis (moisture, acid, wear metals), motor winding insulation test, condenser tubes inspected and brushed, evaporator inspected, starter or VFD terminations checked, sensors calibrated, flow switches tested | Samra planned shutdown |
| Every 3 years | Eddy current test of condenser and evaporator tubes on water-cooled plant, more often on critical process duty. Evaporator tubes cleaned on closed circuits | Arranged by Samra |
Chiller repair: common faults and what we check first
Most breakdown calls fall into a handful of patterns. We read the controller's alarm history before touching anything. Then we check the water side before the refrigerant side, because a blocked strainer or a failed pump causes more "refrigeration" trips than refrigerant does.
| Symptom or alarm | Usual causes | What we check first |
|---|---|---|
| High-pressure trip, worst on summer afternoons | Fouled condenser coil or tubes, failed condenser fan, cooling tower problem, non-condensables, overcharge | Condenser approach, fan operation, condenser-water flow and temperature |
| Low-pressure or freeze-protection trip | Low chilled-water flow, refrigerant leak, expansion valve fault, fouled evaporator | Strainer and pump, flow switch, evaporator approach, superheat, leak search |
| Compressor overload or high amps | Voltage imbalance, worn contactor, winding breakdown, liquid returning to the compressor | Supply voltage and phase balance, contactor faces, insulation resistance |
| Low oil pressure or oil level | Blocked oil filter, oil logging in the evaporator, heater failure, bearing wear | Filter differential, oil return, heater, oil analysis |
| Running but not reaching setpoint | Short charge, fouled heat exchanger, stuck capacity control, sensor drift | Approach temperatures, slide valve or vane response, sensor calibration |
| Noise or vibration | Bearings, coupling misalignment, loose mounts, fan imbalance | Vibration reading, alignment, mounts |
Once the cause is confirmed, you get a fixed-price written quote before any chargeable repair starts. We are open 24/7 and typically respond within 2 hours, day or night.
Compressor overhaul: when it makes sense and what it involves
An overhaul is worth planning when the compressor is wearing but the rest of the chiller is sound. The signs are wear metals or acid rising across oil reports, a climbing vibration trend, lost capacity at the same load, or bearings you can hear. A screw compressor overhaul runs in five stages:
- Baseline. Run data, vibration, the oil report and an insulation test are recorded.
- Recovery. Refrigerant is recovered and weighed, and the compressor is isolated.
- Strip-down. Rotors, housing, bearings, shaft seal and slide valve are inspected and measured. Worn parts are replaced with OEM or OEM-equivalent parts, named on the quote.
- Motor. Windings are tested, and rewound or replaced if needed.
- Rebuild. Nitrogen pressure test, evacuation, charge by weight and a logged run under load.
Centrifugal overhauls are planned shutdown projects. On older R-22 plant, compare the overhaul cost with replacement. R-22 is an HCFC being phased out under the Montreal Protocol, and for countries in the UAE's group consumption must be 97.5% below baseline by 2030, with only a small servicing allowance until 2040.
Capital work runs as a milestone-payment project with a line-item BOQ, and an extended workmanship warranty can be quoted per scope.
Water treatment and condenser-side care on water-cooled plant
A water-cooled condenser is only as clean as the water running through it. Trane puts the cost plainly: a 1°C rise in condenser temperature can add around 2% to operating costs. Scale, silt and biofilm all push that temperature up.
On each visit we test condenser-water chemistry, review the dosing (inhibitors, biocide, bleed-off), clean strainers and compare condenser approach with the commissioning figure. Chemical descaling is always followed by mechanical cleaning, flushing and inspection.
Cooling towers come with their own obligations. Dubai's Al Sa'fat green building system requires them to be periodically cleaned, disinfected and checked under Dubai Municipality's Legionella guidelines, with sampling by a DM-approved company and results kept on site. Tower work is covered on our cooling tower maintenance page and is scheduled alongside the chiller visits.
Chilled-water pump maintenance
A chiller can only deliver what the pumps move, so primary, secondary and condenser-water pumps are serviced with the plant. We check seals for weeping, bearings for noise and heat, and couplings for alignment. We measure duty against the pump curve and read the VFD fault history. We also review the temperature difference (ΔT) across the plant. A small ΔT means too much water is moving for too little cooling, which wastes pump energy and stops chillers loading properly.
Chiller AMC and maintenance contracts
Our chiller annual maintenance contract covers quarterly visits with all routine work, priority response on breakdowns, and a report after each visit that shows the trend. It is quoted per chiller, on capacity and number of units, not per square foot. AHUs, FCUs, cooling towers and pumps on the same site can go on the same contract. AMC clients get a 24/7 priority line and no call-out fee on emergency visits. Full terms are on our commercial AMC page.
When you compare quotes, check whether oil, filter-driers, refrigerant, oil analysis and eddy current testing are included.
| Work | What you get | Price |
|---|---|---|
| Initial chiller audit | Site visit, condition assessment, performance log review, written report with recommended scope | AED 1,500–4,500 depending on chiller size and complexity, credited against any contract we sign |
| Chiller AMC | Quarterly visits, routine work, priority breakdown response | Priced per chiller, by tonnage band |
| Breakdown repair | Diagnosis, then a fixed-price written quote | Diagnostic or call-out fee confirmed at booking |
| Compressor overhaul or capital work | Milestone-payment project with a line-item BOQ | Quoted per scope |
Chillers we service
We work on Carrier, Trane, York, Daikin (McQuay), Hitachi, LG, Petra, Multistack and Smardt chillers, and take on other makes once we have seen them at survey. If your chiller is still under manufacturer warranty, send us the terms first. Some manufacturers require warranty-period work to go through their own network. In district-cooled buildings there is no chiller on site, so we maintain the building side instead, through AHU and FCU servicing.
Chiller maintenance questions
How often should a commercial chiller be serviced in Dubai?
Most commercial chillers need a quarterly planned visit and an annual shutdown inspection, with a daily log kept by the site team or the BMS. Water-cooled plant also needs condenser tube work, water treatment checks and usually an eddy current tube test every few years. Process chillers running 24/7 may need monthly attendance. The manufacturer's manual sets the final intervals.
What does a chiller maintenance contract cover?
Our chiller AMC covers quarterly visits with all routine maintenance, priority response on breakdowns and a written report after each visit showing performance trends. It is priced per chiller, on capacity and number of units. Repairs found during visits are quoted separately at contract rates, and other plant on the same site can join the same contract.
How much does chiller maintenance cost in Dubai?
We start with an initial chiller audit at AED 1,500–4,500, depending on chiller size and complexity. It covers a site visit, a condition assessment, a review of existing logs and a written report with the recommended scope. The fee is credited against any contract you sign with us. Contract and repair prices are then quoted in writing per chiller.
Do you maintain industrial and process chillers?
Yes. We maintain chillers on process duty, such as manufacturing, food, printing and server rooms, as well as comfort cooling. The difference is in the planning. We agree shutdown windows with the production lead, rotate duty with a standby chiller where one exists, and check glycol concentration on every visit. Send the model, duty and shift pattern for a proposed schedule.
Should I overhaul or replace a failing chiller compressor?
Overhaul when the rest of the chiller is sound, parts are available and the refrigerant has a future. Semi-hermetic screw and centrifugal compressors can be rebuilt, while hermetic scrolls are replaced. On older R-22 plant, or where the heat exchangers and controls are also worn, replacement usually makes more sense. We price both options in writing after oil, vibration and electrical tests.
Why does my chiller trip on high pressure in summer?
The condenser cannot reject heat fast enough. On air-cooled chillers the usual causes are dust-packed coils, failed condenser fans or hot discharge air recirculating back into the coil. On water-cooled plant, look for scaled condenser tubes, blocked strainers, low condenser-water flow or a dirty cooling tower. The condenser approach temperature usually points to which one it is.
Do you maintain chillers in buildings on district cooling?
A district-cooled building has no chiller of its own. The provider, such as Empower, Tabreed or Emicool, runs the central plant, and the building owner is responsible for the equipment on the building side. That is the part we maintain: fan coil units, air handling units, building pumps, valves and controls. Our AHU and FCU servicing page covers that scope.
Can you take over a chiller another contractor has been maintaining?
Yes. We start with the initial audit, record the plant as we find it and review whatever logs, oil reports and service records exist. Anything already faulty is quoted as a separate scope so it isn't mixed into routine maintenance. If there are no records, our first quarterly visit becomes the baseline for every later trend.
Workmanship and material warranties
Two layers of cover on every chiller engagement. The workmanship warranty is ours; manufacturer warranties on parts pass through to you directly.
Workmanship warranty
6-month workmanship warranty — if a repair or service item we performed fails within 6 months due to our work, we re-do the labour at no cost.
For project-based capital work (compressor replacement, full overhaul) an extended workmanship warranty is available, quoted per scope and written into the BOQ.
Material warranties
Manufacturer warranties on parts (compressors, control boards, motors, expansion valves) pass through directly. Ranges run from 1 to 10 years depending on the component and brand. Exact terms are documented on the handover sheet.
For cold rooms and commercial refrigeration rather than chilled-water plant, see cold room repair.
Areas we cover
Same-day reach across Dubai. Tap your area for landmarks, communities and the services we deliver there — or tell us your building on WhatsApp.
Request a chiller audit
Send the chiller make, model and tonnage on WhatsApp, plus the building and any recent fault history. We confirm a survey slot and audit fee before we visit.
