Table of Contents
Introduction | 3 | Undercharged Refrigerant Systems | 17 |
4 | Overcharged Refrigerant Systems | 18 | |
Serial Number Identifi cation Guide | 4 | Restricted Refrigerant Systems | 18 |
H Suffi x Chassis Specifi cations | 5 | Capillary Tube Systems | 19 |
E and G Suffi x Chassis Specifi cations | 6 | Reversing Valve — Description/Operation | 19 |
A and D Suffi x Chassis Specifi cations | 7 | Electrical Circuit And Coil | 19 |
Sequence Of Operation | 8 | Testing Coil | 19 |
Electrical Supply | 9 | Checking Reversing Valves | 20 |
Supply Circuit | 9 | Touch Testing Heating/Cooling Cycle | 20 |
Supply Voltage | 9 | Procedure For Changing Reversing Valve | 20 |
Control (Low) Voltage | 9 | Compressor Checks | 21 |
Supply Voltage | 9 | Locked Rotor Voltage Test | 21 |
Electrical Ground | 9 | Single Phase Connections | 21 |
Electrical Rating Tables | 9 | Determine Locked Rotor Voltage | 21 |
Electrical Requirements | 9 | Locked Rotor Amperage Test | 21 |
Room Thermostats | 10 | Single Phase Running & Locked Rotor Amperage | 21 |
Thermostat Location | 10 | External Overload | 21 |
Heat Anticipators | 10 | Checking the External Overload | 21 |
Electrical & Thermostat Wiring Diagrams | Checking the Internal Overload | 21 | |
Indoor Blower - Air Flow | 14 | Compressor Single Phase Resistance Test | 22 |
Condenser Fan Motors | 14 | Compressor Replacement | 22 |
Blower Wheel Inspection | 14 | Capacitors | 23 |
Cooling | 14 | Capacitor Check With Capacitor Analyzer | 23 |
Heating (Electric) | 14 | Capacitor Connections | 23 |
External Static Pressure | 14 | Emergency Heat Switch | 24 |
Checking External Static Pressure | 15 | Wiring Diagram Index | |
Checking Approximate Airfl ow | 15 | 39 | |
Electric Heat Strips | 15 | 40 | |
Airfl ow Charts | 16 | Refrigerant System Diagnosis – Cooling | 41 |
Refrigerant Charging | 16 | Refrigerant System Diagnosis – Heating | 41 |
Method Of Charging | 17 | Electrical Troubleshooting Chart | 42 |
2