Marvair AVPA 48 series User Manual

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MODELS:

AVPA 12-20-24-30-36-42-48-60-72

HVESA 36-42-49-60

HVEA 24-30-36-42-49-60

AVHA 12-20-24-30-36-42-48-60

Installation & Operation Manual

9-11 EER Vertical Wall-Mount Air Conditioners

Manufactured By:

A Division of the AIRXCEL

®

Commercial Group

P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015

(229) 273-3636 • Fax (229) 273-5154

E-mail: marvairsales@airxcel.com • Internet: www.Marvair.com

The most current version of this manual can be found at www.Marvair.com.

IMPORTANT

This manual may include information for options and features which may not be

included on the unit being installed. Refer to the unit data label or Model Identication

to determine which features and options this unit is equipped with.

INSTALLER: Afx the instructions on the inside of the building adjacent to the thermostat.

END USER: Retain this manual for future reference.

Marvair ComPac Installation & Operation Manual 12/2017 Rev.16

Part #01655

Air Conditioner Product Manual

Vertical Wall-Mount Air Conditioners

with Front Control Box Panel

Table of Contents

Questions and Answers:

C
Cody MoranAug 7, 2025
What to do if my Marvair Air Conditioner unit does not run?
- K
  Katherine CannonAug 7, 2025
  If your Marvair Air Conditioner unit isn't running, start by checking the power supply to ensure it has adequate phase and voltage. Inspect the wiring to the unit and any external breakers or fuses. Also, check the internal circuit protection devices for continuity. Verify the operation of the wall-mounted thermostat and reset the pressure switch if the unit is off on a high or low pressure limit. Finally, check for loose wiring and component failures.
D
Dr. Ronnie GainesAug 12, 2025
Why does my Marvair AVPA 48 Air Conditioner run continuously but cooling is insufficient?
- R
  Richard StricklandAug 12, 2025
  Your Marvair Air Conditioner might run for long periods with insufficient cooling due to several reasons. First, check the air filters for dirt and ensure proper blower operation, removing any airflow restrictions. A low refrigerant charge could also be the cause, so check for proper charge and potential leaks. Inspect internal components, especially the compressor, for proper operation. Finally, consider whether the unit is undersized for the job, and if so, consider adding additional units for greater capacity.
D
Daniel HuberAug 17, 2025
What to do if my Marvair AVPA 48 blows fuses or trips the circuit breaker?
- R
  Robert JonesAug 17, 2025
  If your Marvair Air Conditioner is blowing fuses or tripping the circuit breaker, it could be due to several reasons. Check the electrical requirements and correct as necessary. Inspect the field wiring for any shorts, loose connections, or improper connections. Also, check the unit's internal wiring, referring to the wiring and schematic diagrams, and test components, especially the compressor, for shorts. Finally, check if there is excessively high or low supply voltage or phase loss.
J
Jason RodriguezAug 22, 2025
How to troubleshoot a Marvair AVPA 48 that cycles on high/low pressure limit?
- L
  Lauren PerryAug 22, 2025
  To troubleshoot a Marvair Air Conditioner cycling on high/low pressure limit, begin by checking the blower assembly for proper operation and look for airflow restrictions, such as a dirty air filter. Inspect the blower motor and condenser fan. Also, check for blockages or restrictions in the refrigerant circuit, especially the filter drier and capillary tube assembly. If the unit was recently serviced, refrigerant overcharge could be the problem, and you should evacuate and recharge to factory specifications. Finally, check the limit cutout pressures of the pressure control; it should actuate at approximately 35 PSIG (low pressure) and 400 PSIG (high pressure).
M
megancummingsAug 27, 2025
Why is there water on the floor near my Marvair AVPA 48 Air Conditioner?
- K
  Kelsey CobbAug 27, 2025
  If you find water on the floor near your Marvair Air Conditioner, it could be due to an obstruction in the condensate line, so check for any clogs or restrictions. Alternatively, there might be an obstruction or leak in the condensate pan, so inspect the pan for leaks or blockages. Lastly, ensure that the unit is level.
L
Lori MillerSep 1, 2025
What causes no space heating or reduced heating in a Marvair Air Conditioner?
- D
  donovanrhondaSep 1, 2025
  If your Marvair Air Conditioner (equipped with resistance elements) has no space heating or reduced heating, it could be due to defective heating elements; check the resistance elements for continuity. Also, check the continuity across the thermal limit switch, as the thermal limit may be open. Lastly, a defective heater contactor could be the cause; check the relay for proper operation and replace it if defective.

Marvair AVPA 48 series Specifications

General

Brand	Marvair
Model	AVPA 48 series
Category	Air Conditioner
Language	English

Summary

How To Use This Manual

Important Safety Precautions

Essential safety precautions to be followed before performing any work on the unit.

Installation Procedures

Equipment Inspection and Site Requirements

Unit Mounting and Connections

Electrical Connections and Wiring

Detailed instructions for high voltage and low voltage wiring, including phasing.

Start-Up Procedures

Cooling Cycle Check-Out

Procedure for verifying correct operation of the cooling cycle after installation.

Heating Cycle Check-Out

Procedure for verifying correct operation of the heating cycle with resistance elements.

Troubleshooting Guide

Troubleshooting Overview and Symptoms

Introduction to troubleshooting, failure symptoms, likely causes, and corrections.

Common Unit Issues and Corrections

Compressor and Control Board Diagnosis

Diagnosing compressor issues, winding resistances, insulation tests, and control board faults.

Maintenance Procedures

Scheduled Maintenance and Coil Care

Guidelines for regular servicing of air conditioners, including filters, coils, and drains.

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