Mitsubishi Electric NTXMSM48A182BA User Manual

TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT
No. OCHT810
REVISED EDITION-A
HFC
utilized
R410A
September 2023
Note:
•
Specifications have been
changed in REVISED
EDITION-A.
Model name
indication
PARTS CATALOG (OCBT810)
CONTENTS
1. SAFETY PRECAUTION ·······················2
2. OVERVIEW OF UNITS ························5
3. SPECIFICATIONS ···························· 11
4. DATA ·············································· 14
5. OUTLINES AND DIMENSIONS ··········· 36
6. WIRING DIAGRAM ··························· 37
7. NECESSARY CONDITIONS
FOR SYSTEM CONSTRUCTION ········· 40
8. TROUBLESHOOTING ······················· 55
9. ELECTRICAL WIRING ·····················133
10. REFRIGERANT PIPING TASKS ·········139
11. DISASSEMBLY PROCEDURE ···········147
12. REMOTE CONTROLLER ··················168
<Outdoor unit>
[Model Name]
NTXMSM36A142BA
NTXMSM48A182BA
NTXMSM60A182BA
NTXMSH36A142BA
NTXMSH42A152BA
NTXMSH48A182BA
OCHT810 is void.

Mitsubishi Electric NTXMSM48A182BA Specifications

General

Brand	Mitsubishi Electric
Model	NTXMSM48A182BA
Category	Air Conditioner
Language	English

Summary

1 SAFETY PRECAUTION

1-1. ALWAYS OBSERVE FOR SAFETY

General safety guidelines to follow before accessing terminals and ensuring all supply circuits are disconnected.

1-2. CAUTIONS RELATED TO NEW REFRIGERANT

Precautions and specific instructions for handling refrigerant R410A, including tool usage and piping cleanliness.

3 SPECIFICATIONS

Compressor Specifications

Details on the compressor type, manufacturer, motor output, and lubricant.

Protection Devices

Lists protection devices like high pressure switch, inverter circuit protection, and fan motor protection.

6 WIRING DIAGRAM

MODEL SELECTION

7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION

7-1. TRANSMISSION SYSTEM SETUP

8 TROUBLESHOOTING

8-1. CHECKPOINTS FOR TEST RUN

Essential checks and procedures to perform before initiating a test run of the air conditioning system.

8-1-1. Procedures before test run

Step-by-step instructions for pre-test run checks, including installation, piping, and electrical wiring.

9 ELECTRICAL WIRING

9-1. OVERVIEW OF POWER WIRING

9-2. WIRING OF MAIN POWER SUPPLY AND EQUIPMENT CAPACITY

10 REFRIGERANT PIPING TASKS

10-1. REFRIGERANT PIPING SYSTEM

Guidelines for designing the refrigerant piping system, including line-branch methods and piping diameter selection.

Select Each Section of Refrigerant Piping

Additional refrigerant charge

Procedure for calculating and charging additional refrigerant based on pipe size, length, and connected indoor unit capacity.

11 DISASSEMBLY PROCEDURE

Removing the fan motor (MF1, MF2)

Removing the electrical parts box

Maintenance menu

Service menu

12-3. SERVICE MENU

Maintenance password is required

12-4. TEST RUN

12-4-1. TAR-40MAA

Test run operation

Steps for executing test runs in Cool and Heat modes, including checking fan operation.

Auto vane check

12-7. SELF-DIAGNOSIS

12-7-1. TAR-40MAA

Resetting the error history

Steps to reset error history, including confirmation and handling of deletion failures.

12-9. SMOOTH MAINTENANCE

12-10. REQUEST CODE

Set the Refrigerant address and Request code