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Carrier 38NYV035M - User Manual

Carrier 38NYV035M
115 pages
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R410A
FILE NO. SVM-07013-1
SERVICE MANUAL
SPLIT TYPE
Indoor Unit Outdoor Unit
<High Wall, Heat Pump Type> <Heat Pump Type>
42NQV025H 38NYV025H
42NQV035H 38NYV035H
42NQV035M 38NYV035M
42NQV045H
38NYV045H
42NQV045M
38NYV045M
Revised May, 2007

Table of Contents

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Carrier 38NYV035M Specifications

General IconGeneral
HSPFUp to 10
Voltage208/230V
Phase1
Cooling Capacity35000 BTU/h
RefrigerantR410A
Heating Capacity36000 BTU/h
Operating Temperature (Cooling)122°F
Operating Temperature (Heating)75°F

Summary

SAFETY PRECAUTIONS

SPECIFICATIONS

Specification

Detailed specifications for indoor and outdoor units, including capacity, power, and noise levels.

Operation Characteristic Curve

Graphs illustrating operational performance curves based on compressor speed.

Capacity Variation Ratio According to Temperature

Charts showing how capacity changes relative to outdoor temperature.

REFRIGERANT R410 A

Safety During Installation;Servicing

Essential safety precautions for handling R410A refrigerant during installation and servicing.

Refrigerant Piping Installation

Guidelines for installing refrigerant piping, including materials and joint types.

Tools

Required Tools

Lists required and general tools for R410A refrigerant system installation and servicing.

Recharging of Refrigerant

Brazing of Pipes

Materials for Brazing

Information on suitable filler materials and their properties for brazing pipes.

Flux

Explanation of the purpose and types of flux used in brazing.

CONSTRUCTION VIEWS

Indoor Unit

Exploded diagrams and dimensions for the indoor unit components.

Outdoor Unit

Exploded diagrams and dimensions for the outdoor unit components.

WIRING DIAGRAM

42 NQV025 H; 38 NYV025 H, 42 NQV035 H; 38 NYV035 H, 42 NQV035 M; 38 NYV035 M

Wiring diagram for specific indoor/outdoor unit model combinations.

42 NQV045 H; 38 NYV045 H, 42 NQV045 M; 38 NYV045 M

Wiring diagram for specific indoor/outdoor unit model combinations.

SPECIFICATIONS OF ELECTRICAL PARTS

Indoor Unit

Details specifications for electrical components within the indoor unit.

Outdoor Unit

Details specifications for electrical components within the outdoor unit.

REFRIGERANT CYCLE DIAGRAM

Refrigerant Cycle Diagram

Illustrates the flow of refrigerant through the air conditioning system.

CONTROL BLOCK DIAGRAM

Indoor Unit

Block diagram showing the control functions and connections for the indoor unit.

Outdoor Unit

Block diagram detailing the control logic and components of the outdoor unit.

OPERATION DESCRIPTION

Outline of Air Conditioner Control

Overview of the air conditioner's control system and its main components.

Operation Description

Detailed description of various operation modes, controls, and functions.

Auto Restart Function

Explanation and procedure for setting the automatic restart function after power failure.

7-Segment Function

Function of the 7-segment display for showing temperature readings.

Remote Controller and Its Functions

Explains the functions and operations of the remote controller.

Capacity control

Current release control

Function to prevent compressor inverter electronic parts from overheating by controlling speed.

Release protective control by temperature of indoor heat exchanger

Control to prevent freezing or overheating by monitoring indoor heat exchanger temperature.

Defrost control (Only in heating operation)

Function to remove frost from the outdoor heat exchanger during heating operations.

Louver control

How the air direction and swing of the indoor unit louvers are controlled.

ECO operation

Description of the energy-saving ECO operation mode.

Temporary operation

Procedure for starting or stopping the unit using the RESET button without the remote.

Discharge temperature control

Function to detect refrigeration cycle errors and perform protective control.

Pulse Modulating valve (P.M.V.) control

Control mechanism for throttling refrigerant flow using a pulse modulating valve.

Remote-A or B selection

Setting to distinguish between multiple indoor units controlled by separate remote controllers.

Hi-POWER Mode

Operation mode for faster cooling or heating by increasing fan speed and adjusting temperature.

FILTER Indicator

Indicator for filter cleaning status and how to reset it.

Short Timer

Function for immediate unit activation or deactivation for testing purposes.

Night-Light

Feature providing a dim, unobtrusive light for safety and visibility.

DRY OPERATION (COOLING ONLY)

Operation mode for dehumidification with moderate cooling performance.

Hi-POWER OPERATION

Mode for faster cooling or heating by adjusting temperature and airflow.

ECO OPERATION

Energy-saving operation mode that adjusts set temperature and compressor speed.

TIMER OPERATION

Procedures for setting ON and OFF timers for the air conditioner.

PRESET OPERATION

Function to save and recall preferred operating settings.

AUTO RESTART OPERATION

How to set the unit to restart automatically after a power failure.

SLEEP TIMER OPERATION

Function to set a timer for gradual temperature adjustment during sleep.

Name and Functions of Indications on Remote Controller

Explanation of the various indicators and symbols displayed on the remote control.

INSTALLATION PROCEDURE

Installation Diagram of Indoor and Outdoor Units

Visual guide showing the placement and connection of indoor and outdoor units.

Optional Parts, Accessories and Tools

Details the included accessories and parts for installation.

Indoor Unit

Guidelines for selecting an appropriate location for installing the indoor unit.

Drilling a Hole and Mounting Installation Plate

Instructions on drilling holes and mounting the installation plate for the indoor unit.

Electrical Work

Requirements and methods for electrical wiring and connections.

Wiring Connection

Step-by-step guide on how to connect the electrical cables.

Piping and Drain Hose Installation

Procedures for routing and insulating refrigerant pipes and installing the drain hose.

Indoor Unit Installation

Instructions for physically mounting the indoor unit onto the installation plate.

Drainage

Proper methods for installing and ensuring the drain hose functions correctly.

Outdoor Unit

Guidelines for selecting a suitable location for the outdoor unit and adding refrigerant.

Draining the Water

Instructions for ensuring proper water drainage from the outdoor unit, especially during heating.

Refrigerant Piping Connection

Detailed steps for connecting the refrigerant pipes, including flaring.

Evacuating

Procedure for evacuating air from the refrigerant circuit using a vacuum pump.

Wiring Connection

Instructions for connecting the power and interconnecting cables to the outdoor unit.

Test Operation

Procedures for performing initial system tests and settings after installation.

Gas Leak Test

Procedure to check for refrigerant gas leaks after installation.

Auto Restart Setting

How to enable the auto restart function for the unit.

Remote Controller A or B Selection

Setting to select the remote controller for specific indoor units in multi-unit installations.

HOW TO DIAGNOSE THE TROUBLE

First Confirmation

Verifying that the power supply breaker is operating normally.

Confirmation of Power Supply

Verifying that the power supply breaker is operating normally.

Confirmation of Power Voltage

Checking if the power supply voltage is within the specified range.

Operation Which is not a Trouble (Program Operation)

Identifying normal operational behaviors that might be mistaken for faults.

Primary Judgment

Methods for initial troubleshooting, including LED diagnostics and symptom analysis.

Judgment by Flashing LED of Indoor Unit

Interpreting indoor unit LED flashing patterns for self-diagnosis of faults.

Self-Diagnosis by Remote Controller (Check Code)

Using the remote controller in service mode to retrieve and interpret check codes for fault diagnosis.

How to Use Remote Controller in Service Mode

Guide to accessing service mode and using the remote controller for diagnostics.

Caution at Servicing

Important safety precautions and procedures to follow during servicing.

Judgment of Trouble by Every Symptom

Troubleshooting steps for issues related to the indoor unit and remote controller.

Only the indoor motor fan does not operate

Diagnostic steps for troubleshooting the indoor fan motor not operating.

Indoor fan motor automatically starts to rotate by turning on power supply

Troubleshooting steps for an indoor fan motor that starts rotating automatically.

Troubleshooting for remote controller

A flowchart and guide for diagnosing and resolving remote controller issues.

Wiring Failure (Interconnecting and Serial Signal Wire)

Troubleshooting steps for when the outdoor unit fails to operate due to wiring issues.

Check Code 1 C (Miswiring in indoor;outdoor units) and 1 E

Specific troubleshooting guide for error codes 1C (miswiring) and 1E (discharge temp error, leakage).

How to Diagnose Trouble in Outdoor Unit

A diagnostic flowchart for the outdoor unit's inverter assembly.

How to Check Simply the Main Parts

Procedures for checking key components like P.C. boards and motors.

Check procedures

Step-by-step procedures for checking various operational aspects and potential causes of failure.

P.C. Board Layout

Diagram showing the layout of components on the P.C. board for various models.

Indoor Unit (Other Parts)

Checking procedures for specific indoor unit components like sensors and motors.

Outdoor Unit

Checking procedures for outdoor unit components like compressor, fan motor, and sensors.

Checking Method for Each Part

Methods for checking the condition of electrolytic capacitors and diode blocks.

How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

A procedure to test and determine the operational status of the outdoor fan motor.

Symptom

Common symptoms indicating a potential issue with the outdoor fan motor.

Cause

Potential causes for the outdoor fan motor not operating correctly.

How to simply judge whether outdoor fan motor is good or bad

A procedure to test and determine the operational status of the outdoor fan motor.

HOW TO REPLACE THE MAIN PARTS

Indoor Unit

Step-by-step instructions for disassembling and replacing parts of the indoor unit.

Microcomputer

Procedures for accessing and replacing the microcomputer on the P.C. board.

Outdoor Unit

Detailed steps for disassembling and reassembling the outdoor unit for part replacement.

EXPLODED VIEWS AND PARTS LIST

Indoor Unit (1)

Exploded view and parts list for the indoor unit.

Indoor Unit (E-Parts Assy)

Exploded view and parts list for indoor unit electronic components.

Outdoor Unit

Exploded view and parts list for the outdoor unit.

P.C. Board Layout

Diagram showing the layout of components on the P.C. board for various models.

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