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Table of Contents
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Important Safety Information ...........................................
Introduction .........................................................................
Vert-I-Pak Model Number Identication Guide ...................
Serial Number Identication Guide ....................................
Chassis Specications .......................................................
Extended Cooling Performance .........................................
Electrical Requirements .....................................................
Remote Thermostat and Low Voltage Control ..............
V-PAK Electronic Control Board Features ........................
Electronic Control Conguration .......................................
Electronic Control Error Code
Diagnostics/Test Mode .................................................
Electronic Control Features ..............................................
Checking External Static Pressure ...................................
Checking Approximate Airow ..........................................
Airow Charts ....................................................................
Components Testing ....................................................
Refrigeration Sequence of Operation ...............................
Service .............................................................................
Sealed Refrigeration System Repairs ..............................
Refrigerant Charging ........................................................
Method Of Charging .........................................................
Undercharged Refrigerant Systems ............................
Overcharged Refrigerant Systems ...................................
Restricted Refrigerant Systems .......................................
Capillary Tube Systems/Check Valve ..........................
Reversing Valve — Description/Operation ..................
Testing Coil ..................................................................
Checking Reversing Valves ....................................
Reversing Valve
Touch Testing Heating/Cooling Cycle .........................
Procedure For Changing Reversing Valve .............
Compressor Checks ....................................................
Locked Rotor Voltage Test ..........................................
Single Phase Connections .........................................
Determine Locked Rotor Voltage ...............................
Locked Rotor Amperage Test ......................................
Single Phase Running & Locked Rotor Amperage .....
Checking the Overload ...........................................
External Overload ........................................................
Compressor Single Phase Resistance Test ................
Compressor Replacement .....................................
Routine Maintenance ...................................................
9-18 Electrical Troubleshooting Chart – Cooling .........
2-Ton Electrical Troubleshooting Chart – Cooling .......
Electrical Troubleshooting Chart – Heat Pump ...........
Refrigerant System Diagnosis – Cooling ....................
Refrigerant System Diagnosis – Heating ....................
Electrical and Thermostat Wiring Diagrams ...........
Technical Service Data ................................................
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