Friedrich H)A18K25L User Manuals

Table of Contents

• Important Safety Information

  2
• Capillary Tube Systems/Check Valve

  24
• Introduction

  4
• Vert-I-Pak Model Number Identification Guide

  5
• Testing Coil

  25
• Serial Number Identification Guide

  5
• Checking Reversing Valves

  25
• Chassis Specifications

  6
• Touch Testing Heating/Cooling Cycle

  26
• Extended Cooling Performance

  7
• Procedure For Changing Reversing Valve

  26
• Electrical Requirements

  8
• Compressor Checks

  27
• Remote Thermostat and Low Voltage Control

  9
• Locked Rotor Voltage Test

  27
• V-PAK Electronic Control Board Features

  11
• Single Phase Connections

  27
• Electronic Control Configuration

  12
• Determine Locked Rotor Voltage

  27
• Diagnostics/Test Mode

  12
• Locked Rotor Amperage Test

  27
• Electronic Control Features

  14
• Single Phase Running & Locked Rotor Amperage

  27
• Checking External Static Pressure

  15
• Checking the Overload

  27
• Checking Approximate Airflow

  16
• External Overload

  28
• Airflow Charts

  16
• Compressor Single Phase Resistance Test

  28
• Components Testing

  17
• Compressor Replacement

  29
• Refrigeration Sequence of Operation

  19
• Routine Maintenance

  30
• Service

  20
• Sealed Refrigeration System Repairs

  21
• 2-Ton Electrical Troubleshooting Chart – Cooling

  32
• Refrigerant Charging

  21
• Electrical Troubleshooting Chart – Heat Pump

  33
• Method Of Charging

  22
• Refrigerant System Diagnosis – Cooling

  34
• Undercharged Refrigerant Systems

  22
• Refrigerant System Diagnosis – Heating

  34
• Overcharged Refrigerant Systems

  23
• Electrical and Thermostat Wiring Diagrams

  35
• Restricted Refrigerant Systems

  23
• Technical Service Data

  41