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SER 190 at-a-glance

This class is targeted at HVAC technicians and who will gain a working knowledge of the operation and troubleshooting of heat pump units.

  • Procedures cover fixed, two-speed, and variable speed air-to-air heat pumps
  • Commercial split system and packaged including dual fuel units are covered
  • Troubleshoot, service and maintain heat pumps fast and accurately
  • Lab activities include heat pump operation, defrost operation and troubleshooting, supplemental heating, and dual fuel setup

duration cost format register
3 days $900 classroom



Class Overview

Rising energy prices have increased interest in air-to-air heat pumps even in climate zones not normally considered for heat pump applications. Technicians in many climate zones now need to have a good working knowledge of the operation and troubleshooting of heat pump units. This training course covers residential and commercial split system and packaged air-to-air heat pumps including dual fuel units. Students will learn how to troubleshoot, service and maintain heat pumps fast and accurately. Classroom sessions discuss the refrigeration, air, and electrical systems. Newly acquired skills are tested on operating equipment in the lab. Topics covered include heat pump operation, defrost operation and troubleshooting, supplemental heating, dual fuel setup and operation, operation and troubleshooting of variable speed compressor and indoor fan motors, and metering devices including electronic expansion valves. This class is a mix of classroom training and lab exercises on actual residential split system and commercial rooftop units, with 30% to 40% lab time.

Upon request, the EPA 508 certification can be held after class at a slight additional cost. This certification is required to handle refrigerants.

Who should attend this training

This course is for HVAC technicians with a minimum of one year of field experience or a graduate of an HVAC training program. Students are expected to have basic math skills and a basic understanding of HVAC tools (gages and digital thermometers) and troubleshooting equipment.

Class Objectives

Learning Objectives

At the conclusion of this course each student should be able to:

  • Calculate the thermal and economic balance point
  • Measure and adjust blower airflow
  • Calculate and verify capacity in heating mode
  • Read and interpret various wiring diagrams for sequence of operation and isolate, test and prove component failure
  • Upon completion of this course you are able to test for proper heater and sequencer operation
  • Charge a unit in cooling or heating mode
  • Test reversing valve, defrost cycle and thermostat for proper operation

Learning Methods Used

This course uses a combination of classroom lecture, videos, animations, tours in the training facility lab, demonstrations, practical labs on operating equipment and workshops to present the material. Student’s achievement of the learning objectives is determined by successful completion of the workshops, labs, homework, and final written and practical exam. Workshops are instructor guided exercises using the procedures taught in the lectures.

Class Details

Topics Covered

All times are approximate and shown as (classroom hours/lab or workshop hours).

  • Rooftop introduction, types, models and components (1.5/0)
  • 48TC electro-mechanical controls (1.5/1.0)
  • Control terminal boards with Cycle-Loc (1.0/0.5)
  • Gas heating with IGC (1.0/0.5)
  • Heat pump with defrost board (1.0/0.5)
  • Homework (0/0.5)
  • 48/50LC with CSC control (1.0/0.5)
  • 48/50HC with ComfortLink control (1.0/0.5)
  • RTU Open controller (1.0/0)
  • Economizer 2 and IV (1.0/0)
  • Rooftop unit electrical faults lab (0/3.0)
  • Homework (0/0.5)
  • Psychrometrics and airside lab ( 1.5/1.5)
  • Humidizer (1.5/0)
  • EnergyX (1.5/0)
  • Electro-mechanical controls lab (0/3.0)
  • Homework (0/0.5)
  • Economizer X (1.0/0)
  • Staged air volume (1.0/0)
  • Rooftop refrigerant charging (1.5/0)
  • Refrigerant charging lab (0/3.0)
  • Homework (0/0.5)
  • ComfortLink controls lab (0/2.5)
  • Start-up and maintenance (2.0/0)

Class Requirements

Completion requirements

To receive a certificate for this course student must be present for the entire course, complete all workshops and labs and receive a grade of 70% (C+) on graded labs, homework and final.

Prerequisite requirements


Suggested Background

For technicians just entering the HVAC field or persons with no field experience, this course is most effective when preceded by the BASIC Program (SER400), which introduces participants to fundamental concepts of both air conditioning and heating systems, including lab time with service test equipment and tools.

Materials to bring

No special equipment is required we provide the appropriate safety equipment required by Carrier. Arc flash equipment is not required for the voltages used in the lab, if you are required by your company to use other PPE you may bring that to class.

What you will receive

Students in this course receive a course workbook, Carrier Service Procedures handbook, safety gloves and goggles, charging calculators, and PT cards.

Appropriate dress for this class

This class has a number of exercises that take place in the lab on operating units; participants should wear long pants, closed toed shoes and appropriate shirt, long or short sleeve. If your employer requires special dress which is more stringent than these requirements, this dress should be worn.

Class hours

Class starts at 8 AM Monday and runs from 8 AM till 5 PM each day including Friday. Travel arrangements should be made accordingly.

Location & Lodging

Carrier University is located at 6540 Old Collamer Road South, East Syracuse, NY 13057. Lodging options can be found here.