Friedrich H)A09K25, V(E service manual Table of Contents

Table of Contents

Introduction	3	Undercharged Refrigerant Systems	17
Vert-I-Pak Model Number Identifi cation Guide	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	11-13	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	25-26
Checking Approximate Airfl ow	15	9-18 Electrical Troubleshooting Chart – Cooling	39
Electric Heat Strips	15	2-Ton Electrical Troubleshooting Chart – Cooling	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 –Heat Pump	42

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