HIGH COND PRESSURE Carrier — Cooling Tower / Dry Cooler Degradation
At a glance
- Severity
- WARNING THEN STOP
- Domain
- CHILLED_WATER_SYSTEM
- Reference standard
- EN 378 / legionella guidelines
What it means
Degraded towers or dry coolers (scale, algae, fans): heat is not rejected, condensing worsens until chillers trip.
Probable causes
- Dirty or scaled fill and coils
- Inadequate water treatment (towers: legionella risk too)
- Fans failed or running slow
- Blowdown and make-up not calibrated
Where to start
Compare tower/dry cooler approach with baseline and inspect fill, fans and water quality.
Full guided diagnosis in the app
The diagnostic tree for this fault has 3 guided steps with measurements, checks and resolutions. You'll find it in DataCIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More Carrier codes
- APPROACH HIGH — Scale / Corrosion Fouling
- HIGH PRESSURE TRIP — Chiller Fault / Trip
- WATER PRESSURE LOW — Hydraulic Circuit Leak
- 1 — High Pressure Cutout / HP Alarm
- 1 — Belt broken or slipping
- 21 — Water Flow Switch Alarm / No Flow
- 4 — Low Pressure Cutout / LP Alarm
- 42 — Anti-Freeze Protection / Evaporator Freeze Risk