SYSTEM TYPES
THIS SYSTEM PROVIDES BOTH HEATING AND COOLING USING ONE CYCLE
WHAT IS A HEAT PUMP?
THIS LOW VOLTAGE DEVICE CONTROLS HEATING AND COOLING CYCLES.
WHAT IS A THERMOSTAT?
A SYSTEM WON'T TURN ON AT ALL.
WHAT'S THE FIRST THING YOU SHOULD CHECK?
WHAT IS THE POWER SUPPLY OR BREAKER?
THIS SIMPLE METERING DEVICE USES A LONG, NARROW TUBE TO RESTRICT REFRIGERANT FLOW
WHAT IS A CAPILLARY TUBE (CAP TUBE)?
Ohm’s Law states the relationship between these three electrical values.
What are voltage, current, and resistance?
A SMALL, WALL MOUNTED SYSTEM WITH NO DUCTS.
WHAT IS A MINI-SPLIT?
THIS TOOL IS USED TO MEASURE REFRIGERANT LINE TEMPERATURE FOR SUBCOOLING.
WHAT IS A CLAMP THERMOMETER?
THE AIR CONDITIONER IS RUNNING BUT THE HOUSE IS NOT COOLING. WHAT'S ONE OF THE FIRST THINGS YOU SHOULD CHECK?
WHAT IS THE AIR FILTER?
A SMALL BRASS DEVICE WITH A DRILLED HOLE, COMMONLY USED IN RESIDENTIAL SPLIT SYSTEMS.
WHAT IS A PISTON (FIXED ORIFICE /FLOWRATOR)?
If a circuit has 12 volts and 6 ohms of resistance, how much current is flowing?
What is 2 amps?
THE MOST COMMON SYSTEM TYPE WITH AN INDOOR COIL ANS OUTDOOR UNIT
WHAT IS A SPLIT SYSTEM?
THIS STEP MUST BE DONE BEFORE ADDING REFRIGERENT TO A SYSTEM.
WHAT IS PULLING A VACUUM THE SYSTEM?
IF THE OUTDOOR FAN RUNS BUT THE COMPRESSOR DOES NOT, THIS ELECTRICAL PART COULD BE FAULTY.
WHAT IS THE CAPACITOR?
THIS METERING DEVICE ADJUSTS REFRIGERERANT FLOW AUTOMATICALLY BUT IS GRADUALLY BEING REPLACED BY TXV'S AND EEV'S IN MODERERN SYSTEMS.
WHAT IS A FIXED ORIFICE (PISTON)?
This unit measures electrical resistance.
What is an ohm?
A SELF-CONTAINED ROOFTOP SYSTEM.
WHAT IS A PACKAGE UNIT?
A CAPACITOR IS TESTED WITH THIS TOOL.
AND IN WHAT MEASUREMENT?
WHAT IS A MULTIMETER & MICROFARAD?
AN EVAPORATOR COIL FREEZES OVER NAME ONE COMMON CAUSE.
WHAT IS LOW AIRFLOW (DIRTY FILTER, WEAK BLOWER,) OR LOW REFRIGERANT CHARGE?
THIS DEVICE USES A SENSING BULB TO ADLUST RERIGERANT FLOW BASED ON SUPERHEAT
WHAT IS A THERMOSTATIC EXPANSION VAVLE (TXV)?
A 120-volt circuit draws 10 amps of current. What is the total resistance?
What is 12 ohms?
THIS SYSTEM HAS MULTIPULE INDOOR UNITS CONNECTED TO ONE OUTDOOR UNIT, ALLOWING DIFFRENT ROOMS TO BE CONDITIONED INDEPENDENTLY.
WHAT IS A MULTI-ZONE MINI-SPLIT SYSTEM?
IN A LIVE TROUBLESHOOTING LAB, WHY WOULD YOU MEASURE VOLTAGE ACROSS A CONTACTOR COIL?
TO CONFIRM THE THERMOSTAT SIGNAL IS REACHING THE CONTACTOR?
THE THERMOSTAT CALLS FOR COOLING BUT NOTHING STARTS. NAME TWO THINGS YOU WOULD TEST.
WHAT IS THE THERMOSTAT WIRING (24V CONTROL SIGNAL) AND THE CONTACTOR?
THIS ADVANCE METERING DEVICE USES SENSORS AND A MICROPROCESSOR FOR PRECISE REFRIGERANT CONTROL.
WHAT IS AN ELECTRONIC EXPANSION DEVICE (EEV)
A 240-volt system has a current draw of 20 amps. How much power in watts is being consumed?
What is 4,800 watts?