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Carrier 38VMA072HDS5-1 User Manual

Carrier 38VMA072HDS5-1
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38VMH072-432
Outdoor Unit for
Variable Refrigerant Flow (VRF) Heat Pump System
Service Manual
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 17-38VMH001-06 Printed in U.S.A. Form 38VMH-1SM Pg 1 10-17 Replaces: NEW

Table of Contents

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Carrier 38VMA072HDS5-1 Specifications

General IconGeneral
BrandCarrier
Model38VMA072HDS5-1
CategoryAir Conditioner
LanguageEnglish

Summary

Refrigerant Circuit

Function and Control

Basic Control

Covers normal operation, capacity calculation, and compressor control.

Protection Control

High Pressure Protection Control

Protects compressor from excessive system pressure.

Low Pressure Protection Control

Protects compressor from insufficient system pressure.

Discharge Pipe Protection Control

Prevents compressor damage from high discharge temperatures.

Inverter Protection Control

Guards against inverter overcurrent and overheating.

Troubleshooting

0E0: Communication Fault Between ODUs

Addresses communication errors between outdoor units.

0E2: Communication Error Between ODU and IDU

Troubleshoots communication failures between ODUs and IDUs.

0E4: T3 or T4 Temperature Sensor Error

Diagnoses issues with temperature sensors T3 or T4.

0E5: Voltage Protection

Explains voltage-related protection and potential causes.

20HO 10H0: Communication Error Between Main Control Board Chip and Compressor Drive Chip

Troubleshoots communication errors on the main control board.

0H1: Communication Error Between Main Control Chip and Communication Chip

Addresses communication faults between main control and comm chips.

0P1: Current Leakage Error

Detects current leakage and potential insulation issues.

0P1: Discharge Temperature Switch or High Pressure Protection

Handles high pressure or discharge temperature protection faults.

0P2 0H5: Low Pressure Protection

Addresses low pressure errors and sensor readings.

0P3: Over Current Protection for Compressor

Manages compressor overcurrent protection.

0P4 0H6: Discharge Temperature Protection

Protects against excessive discharge temperature.

0P5: High Temperature Protection for Pipe Temperature

Prevents overheating of pipe temperature sensors.

L0~L9 10H4 / 20H4: Compressor INV Module Protection

Details protection mechanisms for the compressor inverter module.

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