Lennox XP25-060-230-01 - VAC Voltage Check

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Page 73

XP25

Perform DC volt checks (19 -23

VDC between FAN PWM and

COM).

Figure 54. VAC Voltage Check

Main Page

Table of Contents1
Overview2
Model Number Identification2
Typical Serial Number Identification2
Specifications2
Electrical Data3
Unit Dimensions4
Typical Unit Parts Arrangement5
Control Panel Components5
Plumbing (Component Locations and Specifications)6
General Information7
Torque Requirements7
Using Manifold Gauge Set7
Operating Service Valves7
Operating Angle-Type Service Valve8
Operating Ball-Type Service Valve8
To Access Service Port8
Reinstall Stem Cap8
Installation9
Unit Placement9
Placing Unit on Slab9
Elevating the Unit9
Stabilizing Unit on Uneven Surfaces10
Wind Barrier (Rooftop or Ground Application) View10
Outside Unit Placement11
Slab Mounting at Ground Level11
Elevated Slab Mounting Using Feet Extenders11
Slab Side Mounting11
Removing and Installing Panels12
Louvered Panel Removal12
Louvered Panel Installation12
New or Replacement Line Set13
Refrigerant Line Set13
Cooling System (HFC-410A)14
Standard Refrigerant Line Set — up to 50 Linear Feet14
XP25 Piping Guidelines14
Liquid Line Diameter Selection Table14
Line Set Installation15
Brazing Connections16
Brazing Procedures17
Piping Panel Removal and Line Set Preparation17
Cap and Core Removal17
Wrap Service Valves18
Flow Nitrogen18
Baze Line Set18
Preparation for Next Step18
Flushing the System19
Fypical Existing Fixed Orifice Removal Procedure19
Typical Existing Expansion Valve Removal Procedure19
Connecting Gauges and Equipment for Flushing Procedure19
Flushing Line Set and Indoor Coil20
Typical New Check Expansion Valve Installation Procedure20
Sensing Bulb Installation20
Equalizer Line Installation20
Leak Testing the System21
Installing Isolation Grommets21
System Leak Test22
Line Set and Indoor Coil22
Connect Gauge Set22
Evacuating the System23
Electrical24
Size Circuit and Install Disconnect Switch24
Install Thermostat24
Load Shedding24
Route Control Wires25
Route High Voltage and Ground Wires25
Outdoor Unit Control Diagram26
Outdoor Control Terminal Designations and Input/Outputs27
Servicing Units Delivered Void of Charge29
Unit Start-Up29
System Operation and Service30
7-Segment Alert and System Status Codes30
Resetting Alert Codes30
Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes30
Outdoor Control 7-Segment Unit Status Displays36
Push-Button Operation38
Unit Selection Code for Outdoor Control38
Idle Mode — Decimal Flashes at 1 Hertz > 0.5 Second ON, 0.5 Second OFF. Idle Mode Is When the System Is Energized but no Demand38
Field Test Mode Operation39
Pump down Mode Operation39
Forced Defrost Mode39
Pump down Jumper39
Field Test, Diagnostic Recall and Program Menu Options40
Normal Operation Character Display String40
Typical 7-Segment Demand Display String40
Enabling Liquid Line Temperature Information41
Configuring Unit Selection Code42
Reconfiguring Outdoor Control Using Icomfort Wi-Fi Thermostat43
Diagnostic Information43
Installer Test43
Defrost Function43
Compressor Short-Cycling Delay44
Heat Pump Cooling Operational Range44
Heat Pump Heating Operational Range44
Outdoor Temperature Operational Range44
Maintenance45
Sunsource Home Energy System45
Locations with Possibility of Heavy Snow or Freezing Rain Accumulation45
Snow Guard Top Cover View — X878245
Typical Unit Wiring (XP25-024 and -036)46
Unit Wiring Diagrams46
Typical Unit Wiring (XP25-048 and -060)47
Load Shedding Feature Wiring Diagram48
Factory Wiring Diagrams49
Typical Factory Wiring (XP25-024 and -036)49
Typical Factory Wiring (XP25-048 and -060)50
Unit Sequence of Operations51
24 VAC Power-Up or Outdoor Reset51
Heat Pump Mode52
Transition to Auxiliary Heat53
Auxiliary Heat54
Defrost Calibration and Defrost Mode Sequence of Operations (All Versions)55
Component Testing56
High and Low Pressure Switch Operation, Checkout and Status / Error Codes56
Verifying High Pressure and Low Pressure Switch Operation56
Low Pressure Switch (S87) Sequence of Operation (All Versions)57
High Pressure Switch (S4) Sequence of Operation (All Versions)58
High and Low Pressure Switch Errors59
Outdoor Control 7-Segment Display Alert Codes - High and Low Pressure Switches59
Reversing Valve Operation, Checkout and Status / Error Codes60
Reversing Valve (L1)60
Reversing Valve Checkout60
Typical Reversing Valve Components and Operation61
Compressor Operation, Checkout and Status / Error Codes62
Outdoor Control 7-Segment Display Alert Codes - Compressor63
Crankcase Heater, Checkout and Status / Error Codes64
Belly-Band Crankcase Heater Thermostat64
Checking Belly-Band Crankcase Heater64
Checking Crankcase Heater Thermostat65
Compressor Sound Cover65
Charge Compensator (XP25-024-230-XX and XP25-048-230-XX Only)66
Discharge Muffler (Heat Pumps Only)66
Liquid Line Bi-Flow Filter Drier (Heat Pumps Only)67
Check Expansion Valve (Heat Pumps Only)68
Plumbing (Component Locations and Specifications) - Diagram69
Top Cap Switch Operation, Checkout and Status / Error Codes70
Outdoor Control 7-Segment Display Alert Codes - Top Cap Switch70
Reactor Operations, Checkout and Status / Error Codes71
XC/XP 25-024 and -036 Reactor71
XC/XP 25-048 and -060 Reactor71
Outdoor Fan Operation and Checkout72
VAC Voltage Check72
XP25 4- and 5-Ton Filter Board (EMC)72
VAC Voltage Check - Diagram73
VDC Voltage Check74
Ferrites74
Outdoor Control Operation, Checkout and Status / Error Codes75
Outdoor Control 7-Segment Display Alert Codes - Outdoor Control Errors76
Unit Sensor Operations, Checkout and Status / Error Codes76
Coil Temperature Sensor (RT21)76
Ambient Temperature Sensor (RT13), Liquid Line Temperature Sensor (RT36)76
Temperature Sensor Specifications77
Temperature Sensor Locations77
Ambient, Coil and Liquid Line Sensors Temperature / Resistance Range78
Variable-Capacity Inverter Control Operation, Checkout, Status / Error Codes79
2- and 3-Ton Unit Inverter View79
4- and 5-Ton Unit Inverter View80
Outdoor Control 7-Segment Display Alert Codes, DC Inverter and Outdoor Control LED Flash Codes80
Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes - Table80
Emergency 24VAC System Operation84
Thermostat Communication Mode84
System Refrigerant85
Gauge Set Connections85
Checking Indoor Airflow over Evaporator Coil Using Delta-T Chart86
Using HFC-410A Weigh in Method87
Using HFC-410A Subcooling Method — High Speed (High Capacity)87
HFC-410A Temperature (Degrees F) - Pressure (Psig)88
XP25 Charging Sticker89

Lennox XP25-060-230-01 - VAC Voltage Check - Diagram

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