CRAC & CRAH Preventive Maintenance in South Florida
Precision cooling units fail on a schedule you can see coming — if somebody is looking. Planned maintenance, documented checks and priority response across Miami-Dade, Broward and Palm Beach.
Airo Service provides preventive maintenance and repair for CRAC, CRAH and precision cooling units across South Florida — scheduled filter and coil service, refrigerant and airflow verification, condensate and humidity checks, and documented reports after every visit. Call (305) 846-0155.
Precision cooling units almost never fail without warning. They fail after a compressor's current draw climbs for weeks with nobody watching, after a chilled water valve drifts out of specification following an unlogged controls update, or after a standby unit sits at low refrigerant charge through months of deferred service — and then does not start on the day it is finally needed.
Every one of those is visible in advance to somebody who shows up on a schedule with a checklist.
What a Scheduled Visit Covers
- Filters and airflow — replacement on interval, differential pressure check, verification that the unit is actually moving its rated air and not fighting a loaded filter bank.
- Coils — inspection and cleaning of evaporator and condenser coils. In coastal South Florida this is the single highest-value item on the list; a salt-fouled condenser coil quietly costs capacity and compressor life every day it stays dirty.
- Refrigerant circuit (CRAC/DX) — charge verification, superheat and subcooling, suction and discharge pressures, compressor amperage trended against previous visits. A rising amp draw is the earliest honest warning you get.
- Chilled water circuit (CRAH) — valve operation and travel, actuator response, strainer condition, coil differential, and confirmation that control setpoints still match what the BMS thinks they are.
- Condensate — pans, drains, pumps, float switches and traps. Flushed and tested, not just glanced at. A blocked drain in a computer room is a water event above live equipment.
- Humidification and dehumidification — operation, sensor calibration and, where fitted, canister or steam generator condition. Miscalibrated humidity sensors cause units to fight each other and burn energy continuously.
- Fans, belts and bearings — condition, alignment, tension, lubrication where applicable, and vibration by feel and sound.
- Electrical — contactors, capacitors, connection torque and thermal check on the terminations that carry the load.
- Controls and alarms — setpoints verified, alarm thresholds confirmed, and an actual test that the alarm reaches a human.
- Redundancy check — where the room has a standby unit, we run it. A backup that has not been started in a year is not a backup.
Every visit ends with a written report: what was found, what was corrected, what is trending, and what needs a decision.
Suggested Service Intervals
- Monthly — visual and sensor checks: filters, alarms, room temperature and humidity, condensate, anything audibly wrong. Often handled by site staff with a checklist we provide.
- Quarterly — mechanical PM: filter replacement, coil inspection and cleaning as needed, belt and bearing service, refrigerant or chilled-water readings logged and trended.
- Annually — deep service: chemical coil cleaning, electrical thermal inspection, full controls and setpoint verification, and a failover test of any redundant unit.
South Florida deserves the aggressive end of every interval. Northern facilities shut compressors off for months of free cooling; here the equipment runs essentially year-round against high wet-bulb air, and coastal sites add salt corrosion on top. Run hours accumulate faster, so intervals that are conservative in Ohio are merely adequate here.
Repair & Emergency Support
- Precision unit not cooling — diagnosis across the refrigerant circuit, airflow path, controls and power.
- Compressor, capacitor and contactor failures — the common causes of an unexpected outage, and the ones that show up in trended readings first.
- Condensate overflow — the failure most likely to damage equipment rather than merely stop cooling.
- Humidity out of range — sensor calibration, unit fight between neighbouring machines, and infiltration paths.
- Supplemental cooling during a failure — we coordinate portable spot cooling to hold the room within limits while the repair happens.
Overheating equipment is triaged ahead of comfort calls and we aim to be on site the same day. Call (305) 846-0155.
Maintenance Plans
Priced per unit, per year, and billed monthly so it lands as a predictable operating cost instead of an annual surprise.
- Essential — 2 visits per year. Filter replacement, coil inspection and cleaning, refrigerant or water-side readings logged, condensate flushed and tested, written report. Suited to a single non-critical unit.
- Standard — 4 visits per year (quarterly). Everything in Essential, plus compressor amperage and pressures trended visit over visit, electrical connections checked, controls and alarm thresholds verified, redundant unit started and tested, priority scheduling, and a discount on any repair work. This is the right plan for most server rooms and edge sites.
- Critical — quarterly mechanical plus annual deep service. Adds chemical coil cleaning, electrical thermal inspection and a documented failover test of redundant equipment. For rooms where an outage stops the business.
Every plan includes a written report after each visit — the documentation your insurer, auditor or landlord will eventually ask for — and priority scheduling ahead of comfort calls. Call (305) 846-0155 for a proposal based on your unit count and how critical the room is.
A Note on Equipment and Scope
We service the mechanical and refrigeration side of precision cooling — coils, filters, refrigerant circuits, chilled water coils and valves, condensers, drainage, airflow and controls verification. If your unit is under an active factory warranty or a manufacturer service agreement, or if the fault sits inside proprietary manufacturer controls, we will tell you that the right call is the factory rather than us. We would rather give up a repair than cost you a warranty.
Frequently Asked Questions
What is the difference between a CRAC and a CRAH unit?
A CRAC (computer room air conditioner) is a direct-expansion unit with its own refrigerant circuit and compressor, rejecting heat to an outdoor condenser. A CRAH (computer room air handler) has no compressor — it passes chilled water from a central plant through a coil and modulates a valve to control capacity. CRACs are common in smaller rooms and edge sites; CRAHs dominate larger facilities that already have a chilled water plant. They need different maintenance: a CRAC visit centres on the refrigerant circuit and compressor, a CRAH visit on the valve, actuator and water-side performance.
How often should CRAC units be serviced?
A practical schedule is monthly visual and sensor checks, quarterly mechanical maintenance including filters and coil inspection, and an annual deep service with chemical coil cleaning, electrical thermal inspection and a redundancy failover test. In South Florida, lean toward the shorter end of every interval — the equipment runs year-round and coastal salt accelerates coil degradation.
What are the most common causes of data center cooling failure?
Three patterns account for most of them: a compressor whose rising current draw went unmonitored until it failed, a chilled water control valve that drifted out of specification after an unlogged controls change, and a standby unit that quietly lost refrigerant through months of deferred maintenance and would not start when it was needed. All three are preventable by a scheduled visit that logs readings and trends them.
Do you service Liebert, Vertiv or Stulz precision units?
We service the mechanical and refrigeration side of precision cooling equipment across manufacturers. For units under an active factory warranty or manufacturer service agreement, or for faults inside proprietary controls, we will point you to the factory rather than risk your coverage.
Why does coil cleaning matter so much in South Florida?
Because the equipment never gets a break and the air is corrosive. A condenser coil fouled with salt and dirt raises head pressure, which lowers capacity and raises compressor current — you lose cooling and pay more for what is left, and the compressor wears faster the entire time. On coastal sites regular washing and appropriate coil coatings measurably extend equipment life.
What is included in a maintenance agreement?
Scheduled visits at an agreed interval — two, four or more per year depending on how critical the room is — plus the full mechanical and controls checklist, readings trended from visit to visit, a written report each time, priority scheduling ahead of comfort calls, and a discount on repair work. Plans are priced per unit per year and billed monthly. Call (305) 846-0155 for a proposal based on your equipment count and criticality.
Do you cover Miami, Fort Lauderdale and West Palm Beach?
Yes — all of Miami-Dade, Broward and Palm Beach counties. Airo Service is a licensed Florida HVAC contractor, license CAC1824778, carrying $1,000,000 per occurrence / $2,000,000 aggregate general liability, and a certificate of insurance naming your building owner or property manager as additional insured can be issued on request.
Precision Cooling Service Across South Florida
Miami-Dade, Broward and Palm Beach counties. Related: data center & mission-critical cooling, server room air conditioning, AI data center cooling, AC maintenance.
Get a Maintenance Proposal
Tell us what units you have, where they are and what the room does. You will get an interval recommendation and a price — not a sales visit.
- ✔ Free, No-Obligation Estimate
- ✔ Upfront Written Pricing — No Surprises
- ✔ 10-Yr Parts / 1-Yr Labor Warranty
- ✔ Serving Miami-Dade, Broward & Palm Beach
Prefer to talk? Call (305) 846-0155.
