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Marvair ComPac I AVP24 - User Manual

Marvair ComPac I AVP24
38 pages
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Chapter 1 Description ...................................... 5
Chapter 2 Installation .................................... 18
Chapter 3 Start-Up ........................................
30
Chapter 4 Troubleshooting ............................ 32
Chapter 5 Maintenance .................................. 35
Chapter 6 Warranty ....................................... 36
Parts List & Exploded Views .............................. 38
ComPac
®
I and ComPac
®
II
Air Conditioner Product Manual
Vertical Wall-Mount Air Conditioners
with Front Control Box Panel
Models AVP24-30-36-42-48-60-72
P/81024 6/09-18
supersedes 10/07-17
Manufactured By:
Marvair
®
Division of AIRXCEL
®
, Inc.
P.O. Box 400 • Cordele, Georgia 31010
156 Seedling Drive • Cordele, Georgia 31015
(229) 273-3636 • Fax (229) 273-5154
E-mail: marvairtech@airxcel.com • Internet: www.marvair.com

Table of Contents

Questions and Answers

  • I
    isaac71Aug 1, 2025
    Why my Marvair ComPac I AVP24 Air Conditioner does not run?
    • T
      tonyagarciaAug 1, 2025
      If your Marvair Air Conditioner isn't running, here are a few things to check: * First, ensure there's adequate power supply, voltage, and proper wiring to the unit. Also, check external breakers or fuses. * Second, examine the internal circuit protection devices for continuity. * Third, verify the operation of the wall-mounted thermostat. It might be defective or simply shut off. * Fourth, the unit may be off due to a high or low pressure limit. Try resetting the pressure switch. * Finally, check for loose wiring and component failures.
  • A
    Adriana RichAug 6, 2025
    What to do if Marvair ComPac I AVP24 Air Conditioner runs constantly but doesn't cool?
    • K
      Kurt BrownAug 6, 2025
      If your Marvair Air Conditioner is running for long periods without sufficient cooling, consider the following: 1. Check the air filters for dirt and ensure proper airflow. Verify the blower operation and remove any airflow restrictions. 2. Check for proper refrigerant charge and any potential leaks. 3. Inspect internal components, especially the compressor, for proper operation. 4. Assess whether the unit is appropriately sized for the job. If undersized, consider adding additional units for greater capacity.
  • R
    Rachel CollinsAug 11, 2025
    Why does my Marvair ComPac I AVP24 Air Conditioner keep tripping the circuit breaker?
    • C
      Cheryl MillerAug 11, 2025
      If your Marvair Air Conditioner is blowing fuses or tripping the circuit breaker, consider the following: 1. Ensure the circuit has adequate ampacity, referring to the electrical requirements. 2. Check the field wiring for any shorts, loose connections, or improper connections. 3. Inspect the unit for internal short circuits and loose or improper connections. Test components, especially the compressor, for shorts. 4. Verify that the supply voltage is within the acceptable range and that there is no phase loss.
  • N
    nelsonmichaelAug 16, 2025
    What to do if my Marvair ComPac I AVP24 Air Conditioner cycles on high/low pressure limit?
    • A
      alexandergloverAug 16, 2025
      If your Marvair Air Conditioner is cycling on the high/low pressure limit, here's what to investigate: * First, check the blower assembly for proper operation. Look for airflow restrictions, such as a dirty air filter. Also, inspect the blower motor and condenser fan. * Second, examine the refrigerant circuit for any blockages or restrictions, paying special attention to the filter drier and capillary tube assembly. * Third, if the unit has been recently serviced, refrigerant overcharge may be the cause. Evacuate and recharge the system to factory specifications. * Fourth, a defective pressure control could be the issue. Check the limit cutout pressures; the control should actuate at approximately 35 PSIG (low pressure) and 400 PSIG (high pressure).
  • R
    richardscatherineAug 20, 2025
    How to stop water leaking from my Marvair Air Conditioner?
    • P
      Pamela MooreAug 20, 2025
      If you find water on the floor near your Marvair Air Conditioner, here are some possible causes: * Check the condensate line for any clogs or restrictions. * Inspect the condensate pan for obstructions or leaks. * Ensure that the unit is level.
  • C
    Christina MartinezAug 27, 2025
    What to do if my Marvair ComPac I AVP24 Air Conditioner has no space heating?
    • M
      Mr. Michael WaltonAug 27, 2025
      If your Marvair Air Conditioner (equipped with resistance elements) provides no or reduced space heating, consider the following: 1. Check the heating elements for continuity. 2. Verify continuity across the thermal limit switch. 3. Check the heater relay for proper operation and replace if defective. 4. Check across the thermal cut-out (TCO) adjacent to the elements for continuity. It should be normally closed.

Summary

How To Use This Manual

Important Safety Precautions

Key safety guidelines and warnings for handling and operating the equipment.

Chapter 1: Description and Specifications

Electronic Control Board Operation

Details on the control board's modes, LEDs, and fault indications.

Electrical Diagrams

Reference to schematics for understanding unit wiring and electrical components.

Chapter 5: Maintenance

Scheduled Maintenance

Recommended routine maintenance tasks to ensure optimal performance.

Chapter 6: Warranty

Limited Product Warranty

Chapter 2: Installation

Equipment Inspection

Installation Requirements

Installation Materials

Porting and Duct Work

Ducting Guidelines

Mounting The Unit

Electrical Connections

Essential information for making safe and correct electrical connections.

High Voltage Wiring

Phase and Low Voltage Wiring

Controller Specific Wiring

Chapter 3: Start-Up

Cooling Cycle Check-Out

Procedures for verifying the proper operation of the cooling cycle.

Cooling Cycle Procedure

Heating Cycle Check-Out

Procedures for verifying the proper operation of the heating cycle.

Heating Cycle Procedure

A;C Testing with LL357 D4

Testing procedures for units controlled by the LL357D4 lead/lag controller.

Testing Procedure

Detailed steps for testing dual units with the LL357D4 controller.

Chapter 4: Troubleshooting

Failure Symptoms Guide

A guide to identifying likely causes and corrections for unit problems.

Compressor Troubleshooting

Diagnostic steps for identifying and resolving compressor-related issues.

Electrical Tests for Compressor

Includes voltage, amperage, and winding resistance tests.

Control Board Diagnosis

Interpreting diagnostic LEDs and troubleshooting the control board.

Marvair ComPac I AVP24 Specifications

General IconGeneral
ModelAVP24
BrandMarvair
CategoryAir Conditioner
Cooling Capacity24, 000 BTU/h
Voltage208/230V
Phase1
Compressor TypeRotary
RefrigerantR-410A
Air Flow (Cooling)800 CFM

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