Cert III Air Conditioning & Refrigeration case studies
Cert III Air Conditioning & Refrigeration · Put your knowledge to work in context.
The Certificate III in Air Conditioning and Refrigeration is the trade-level qualification for people who install, commission, service and repair refrigeration and air conditioning equipment. It suits apprentices working under supervision, career changers entering the trade, and technicians formalising skills they already use on site. The Cert III Air Conditioning & Refrigeration case studies are 5 cases and about 2,801 words.
1Recovering R-410A After a Coil Leak in a Plant Room
You are a third-year apprentice sent with a licensed technician to a small supermarket plant room holding three R-410A condensing units. Unit 2 has a leaking evaporator coil; the technician isolates it and recovers the charge.
596 words, about 3 min2Superheat Readings That Do Not Match the Charging Chart
A split system using R-32 is reported as 'not cooling well' in a first-floor office. Outdoor ambient is 35 °C, indoor return air is 24 °C dry-bulb and 17 °C wet-bulb.
578 words, about 3 min3Compressor Trips on Overload After a Control Board Replacement
You attend a walk-in cool room whose single-phase condensing unit keeps tripping its compressor overload after about four minutes of running. A previous contractor replaced the defrost/control board two weeks ago.
552 words, about 3 min4Commissioning a New Line Set With a Nitrogen Holding Charge
You are commissioning a new 8 kW R-410A ducted split system in a renovated café. The line set is 18 m, mostly in a ceiling void, with a 4 m rise and three brazed joints made on site.
545 words, about 3 min5Decommissioning an Old R-22 System and Advising the Customer
A landlord asks you to remove an ageing R-22 split system from a rental unit and 'just take the outdoor unit away' so the unit can be re-let. The system has been off for two years and the outdoor unit is in a rear courtyard with limited access.
530 words, about 3 min