Goodman PC - User Manual

Questions and Answers

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jacob32Aug 16, 2025
What to do if my Goodman Heat Pump unit will not run?
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  Anthony CunninghamAug 16, 2025
  If your Goodman Heat Pump doesn't run, first check the unit voltage at the contactor. If there is no voltage, check for any loose electrical connections. If the voltage is present, reset the thermostat. Also, check the contactor for 24 volts at the coil; replace the contactor if the contacts are open. Replace any blown fuses or reset tripped breakers. Check the wiring and replace the transformer if defective. Inspect the high or low pressure control (if equipped). The high pressure control opens at 610 psig, and the low pressure control opens at 22 psig. If none of the above resolves the issue, replace the compressor, remembering to wait at least 2 hours for the overload to reset.
C
Craig MurphyAug 19, 2025
Why is my Goodman PC Heat Pump compressor short cycling?
- H
  Hannah LeeAug 19, 2025
  If your Goodman Heat Pump's compressor cycles frequently, it could be due to a defective overload protector, in which case you should replace it and check for correct voltage. The unit might also be cycling on low pressure control, so check the refrigerant charge and airflow. Another possibility is that the high pressure switch is cutting out; in this case, check the airflow (both indoor and outdoor) and the expansion device.
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kinganthonyAug 21, 2025
What causes insufficient cooling in my Goodman PC Heat Pump?
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  Dakota BowmanAug 21, 2025
  Insufficient cooling in your Goodman Heat Pump can be caused by several factors. First, the unit might be improperly sized, so recalculate the load. Second, there might be improper airflow; it should be approximately 400 CFM per ton. Third, the refrigerant charge might be incorrect; charge it per the procedure attached to the unit service panel. Fourth, incorrect voltage can be a factor; at the compressor terminals, voltage must be within 10% of nameplate volts when the unit is operating.
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Jesse PerryAug 25, 2025
What to do if my Goodman PC condenser fan runs, but the compressor doesn't?
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  Mary ReedAug 25, 2025
  If the condenser fan runs but the compressor doesn't, first check for unit voltage at the compressor and tighten all connections. If that's not the problem, wait at least 2 hours for the overload to reset; if it's still open, replace the compressor. Also, at the compressor terminals, voltage must be within 10% of nameplate volts when the unit is operating. Finally, check the capacitor; if it's defective, replace it.
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melissa29Aug 27, 2025
Why is my Goodman PC showing high head pressure with high or normal suction?
- D
  Dillon McbrideAug 28, 2025
  High head pressure with high or normal suction in your Goodman Heat Pump can stem from several issues: * If in cooling mode, the condenser coil might be dirty; if in heating mode, the filter or indoor coil might be dirty. Clean the coil in cooling mode or the filter/indoor coil in heating mode. * The system might be overcharged, so correct the system charge. * In cooling mode, the condenser fan might not be running; in heating mode, the indoor blower might not be running. Repair or replace the fan or blower as needed.
A
Amy WalkerAug 30, 2025
Why is my Goodman PC Heat Pump showing registers sweat?
- L
  ldodsonAug 31, 2025
  Registers sweat because of low airflow. To fix this, increase the speed of the blower or reduce restriction by replacing air filters.
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Karen WalterSep 2, 2025
Why is my Goodman Heat Pump showing high suction pressure?
- J
  jamesfitzgeraldSep 3, 2025
  High suction pressure in your Goodman Heat Pump may be due to an excessive load, so recheck the load calculation. Another cause could be a defective compressor, in which case you should replace it. Finally, the reversing valve might not be seating properly, requiring replacement.
H
Heather DeleonSep 5, 2025
Why is my Goodman PC Heat Pump showing low suction with a cool compressor and iced evaporator coil?
- C
  cliffordballardSep 6, 2025
  Low suction with a cool compressor and iced evaporator coil in your Goodman Heat Pump can arise from: * In cooling mode: low indoor airflow. In heating mode: dirty outdoor coil, defective defrost thermostat or control board, outdoor fan not running, or low refrigerant charge. Increase blower speed or reduce restriction by replacing air filters. * Low airflow: Aim for approximately 400 CFM per ton, ensure clean air filters, and open all duct outlets. * Low refrigerant charge: Properly charge the unit. * Operating in cooling mode below 65°F outdoor temperature: Install or check the low ambient control, which should be open below 65°F.
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Gloria GlassSep 9, 2025
What causes high head and low suction in my Goodman PC Heat Pump?
- W
  William ThompsonSep 9, 2025
  High head and low suction in your Goodman Heat Pump is caused by a restriction in the liquid line or a non-functioning TXV. Remove the restriction or replace the TXV with the proper size.
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John JohnsonSep 12, 2025
What causes low head and high suction in my Goodman Heat Pump?
- R
  Randall ThomasSep 12, 2025
  Low head and high suction in your Goodman Heat Pump can be caused by: 1. Incorrect TXV: Replace it with the correct TXV. 2. Defective compressor valves: Replace the compressor. 3. TXV not functioning properly: Check for debris or deformation and remove debris or replace the TXV. 4. Incorrect TXV setting: Check the Super Heat.

Summary

Attention Installing Personnel

Safety Instructions

General Safety Warnings

Important warnings regarding uncertified devices, high voltage, and proper ventilation.

Codes and Regulations

EPA and National Codes

Compliance with EPA regulations and national/local codes is mandatory for installation.

Pre-Installation Checks

Location, Clearance, and Foundation

Guidance on unit placement, clearances, and proper foundation setup.

Rooftop Installation and Curbing

Roof Structural Integrity

Verifying the roof's capacity to support the unit and associated loads.

Rigging Details

Rigging Safety Precautions

Essential safety measures for rigging operations to prevent injury or damage.

Airflow and Filters

Air Flow Conversion

Instructions for converting airflow from horizontal to down discharge, including blower speed adjustment.

Filter Installation and Maintenance

Guidelines for selecting, installing, and maintaining air filters for optimal unit operation.

Duct Work Requirements

Requirements for designing and installing duct systems, including weatherproofing exposed sections.

Piping and Condensate Drain

Condensate Drain Requirements

Specifies the requirements for the condensate drain connection, including trap and slope.

Wiring Instructions

Low Voltage and Internal Wiring

Covers thermostat wiring and internal wiring replacement procedures.

Startup Procedures and Key Components

Startup and Checks

Detailed steps for cooling and heating startup, plus final system verification.

Unit Components Overview

Descriptions of essential components like contactor, crankcase heater, and condenser motor.

Heat Pump Operation

Cooling Cycle

Describes the operational process when the unit is set to cool the indoor environment.

Heating Cycle

Details how the unit functions to provide heat, including refrigerant flow and defrosting.

Defrost Control

Field Testing and Troubleshooting

Provides guidance on how to test and diagnose issues with the defrost control system.

Airflow Measurement and Adjustment

Indoor Blower Motor Adjustments

Specific procedures for modifying blower motor speed on X-13 and ECM motors.

APH Dip Switch Functions and Settings

CFM Control and Thermostat Settings

Details dip switch settings for CFM, fan-only mode, humidity control, and thermostat wiring.

Expansion Valve (TXV) System

TXV System Adjustments

Procedures for checking and adjusting TXV systems, including refrigerant charge checks.

Electrical Adjustments

Electric Heat Kit Installation

Information on selecting and installing electric heat kits and their kW ratings.

Maintenance and Troubleshooting

Common Issues and Valve Malfunctions

Addresses problems like outdoor air intake, undercharge, sensor contact, and reversing valve issues.

APH15 CFM Output and Dip Switch Settings

Dip Switch Settings for Thermostats

Explains how to set dip switches for single and two-stage thermostat compatibility.

Adjustments via Dip Switch Combinations 7-8

Describes how to fine-tune CFM output using specific dip switch combinations.

This document provides installation instructions for Goodman Manufacturing Company's self-contained package heat pump units, specifically the *PC/*PH15 "M" Series. These units are designed for outdoor use only and are available in various cooling capacities and with optional field-installed heat kits. The manual emphasizes safety precautions, proper installation procedures, and maintenance guidelines to ensure optimal performance and longevity of the equipment.

Function Description

The *PC/*PH15 "M" Series units are self-contained package heat pumps that provide both heating and cooling functions. They include a hermetically sealed refrigerating system comprising a compressor, condenser coil, evaporator coil with flowrator, an indoor blower, a condenser fan, and all necessary internal electrical wiring. Heat pump models also feature a reversing valve, solenoid, defrost thermostat, and loss of charge protection. The system is factory-evacuated, charged, and performance-tested. The units are designed to be easily installed in manufactured or modular homes with existing high-static ductwork and can be converted to accommodate plenums for normal or low-static applications.

Important Technical Specifications

Cooling Capacities:
- *PH M-Series: 2, 2.5, 3, 4, and 5 nominal tons.
- GPC: 2 to 4 tons.
Optional Heat Kits: 5, 8, 10, 15, and 20 kW.
Electrical Characteristics: Refer to the unit's rating plate for specific voltage, frequency, and phase requirements. Transformer is wired for 230 volts on 208/230 models.
Refrigerant: Type and amount are indicated on the rating plate. The units are charged using the superheat method at the compressor suction line for fixed orifice devices. TXV systems have specific subcooling and superheat requirements (10 ± 2°F subcooling and 15 to 18°F superheat for single-speed; 5 to 7°F subcooling and 15 to 18°F superheat for two-speed on low stage).
Condensate Drain: ¾" N.P.T. half coupling. A trap must be provided for proper drainage.
Minimum Filter Size: Various nominal sizes (inches) and corresponding nominal areas (sq. ft.) are provided, ranging from 1.4 sq. ft. (10x20) to 4.3 sq. ft. (25x25). Throwaway filters must be sized for a maximum face velocity of 300 feet per minute.
Blower Performance Data: Detailed CFM, Watts, and E.S.P. (In. of H₂O) tables are provided for different models and speeds (T1, T2/T3, T4/T5, T4/T5 (HS), T4 (YHS), T5 (W2HS)). Data is for dry coil, with wet coil pressure drop approximately 0.1" H₂O for two-row, 0.2" H₂O for three-row, and 0.3" H₂O for four-row indoor coils. Filter pressure drop (approx. 0.08" H₂O) is not included. All models should run no less than 350 CFM/TON. Airflow is reduced by 2% for 208-volt operation.
ECM Motor Dip Switch Functions: Eight 2-position dip switches control Electric Heat, Indoor Thermostat, Cooling & Heat Pump CFM, and CFM Trim Adjust.
AHRI Certification: Certified to AHRI Standard 210/240 for Unitary Small AC and Unitary Small HP.

Usage Features

Outdoor Installation: Designed for outdoor use with unobstructed condenser air inlet and discharge.
Air Flow Conversion: Units can be easily converted from horizontal to down discharge airflow delivery.
Duct Work: Duct systems and register sizes must be properly designed for the unit's CFM and external static pressure rating. Ductwork exposed to the outdoors must include a weatherproof barrier and adequate insulation.
Thermostat Control: The unit is controlled by a room thermostat. For heat pumps, the reversing valve is energized in cooling mode. Optional outdoor thermostats prevent full electric heater operation at varying outdoor ambient temperatures.
Defrost Control: Provides time/temperature initiation and termination of the defrost cycle. Defrost timing periods (30, 60, 90 minutes) can be selected via a circuit board jumper. The control also provides a 3-minute off-cycle compressor delay.
ECM Motor: Features improved efficiency, constant CFM, soft start and stop, and improved humidity control. CFM levels can be adjusted through dip switches.
Humidity Control: When using a humidistat, cutting jumper PJ6 on the control board adjusts airflow to 85% for both low and high stage cooling.
Two-Stage Heating: For staged electric heat, jumper PJ4 on the control board must be cut.

Maintenance Features

Shipping Inspection: Upon receiving the unit, inspect for damage. Incorrect units must not be installed.
Filter Installation: Filters are not provided with the unit and must be supplied and externally installed in the return duct system. A field-installed filter grille is recommended for easy access. Filters should be clean, and airflow arrows must point toward the circulator blower.
Crankcase Heater: If used, the unit should be energized 24 hours prior to compressor start-up to ensure the crankcase heater has sufficiently warmed the compressor.
Seasonal Start-up: Homeowners should inspect the unit before a seasonal start-up to ensure coils are free of debris, registers are unobstructed, and filters are clean or replaced.
Troubleshooting Chart: A detailed chart is provided to help identify and resolve common operational issues, including high/low head pressure, unit not running, compressor issues, and insufficient cooling.
Refrigerant Charge Check: After airflow measurements, the refrigerant charge must be checked and adjusted if necessary, especially for units with fixed orifice devices.
Servicing: All installation and servicing must be performed by qualified, experienced technicians. Disconnect all power before servicing.
Component Access: Allow 36" minimum for service access to the compressor compartment and controls. Refrigerant gauge connections are on the right side of the unit. Electrical connections can be made on the right, bottom, or duct panel side.