Toshiba MMY-MUP2401HT8P-A User Manual

12. OUTDOOR UNIT PARTS REPLACEMENT METHODS
No. Part Work procedure Remarks
Cabinet
WARNING
Wear a pair of gloves.
Otherwise, you will risk an injury involving a replacement
part or some other object.
1. Detachment
1) Stop the air conditioner operation, and turn off the
circuit breaker.
2) Remove the front cabinet (right).
(M5 × 10 6 pcs)
3) Remove the front cabinet (left).
(M5 × 10 4 pcs)
4) Remove the top plate.
(M5 × 10 8 pcs) Front: 3 pcs, Back:3 pcs,
Left and Right: 1 pcs each
5) Remove the front cabinet (upper)
(M5 × 10 5 pcs)
* Remove the NFC holder first (M4 × 10 1 pcs)
• Remove the back side cabinet (upper).
(M5 × 10 5 pcs)
6) Remove the side panel (right and left).
Each (M5 × 10 4 pcs)
7) Remove the right side panel. (Only 990W cabinet)
(M5 × 10 5 pcs)
* Each cabinet has the hooks.
Lift the cabinet to remove the hooks.
1
2. Attachment
Carry out installation by following reverse procedure in the
detachment 1) to 7).
Hang the hooks into the slit on the metal frame to securely
attach each cabinet.
NFC holder
Hook
Insert each
claw of NFC
holder into
each squre hole
5) Front cabinet
(upper)
4) Top plate
NFC holder
6) Side panel
2) Front cabinet (right)
7) Right side panel
3) Front cabinet (left)
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Toshiba MMY-MUP2401HT8P-A Specifications

General

Brand	Toshiba
Model	MMY-MUP2401HT8P-A
Category	Air Conditioner
Language	English

Summary

SERVICE MANUAL

SAFETY CAUTION

REFRIGERANT (R410A)

1. WIRING DIAGRAMS

2. PARTS RATING

2-1. Outdoor Unit (50Hz model: MMY-MUP***1HT8(J)P)

Lists parts and ratings for 50Hz outdoor units.

2-5. Inverter Assembly

Details components within the inverter assembly.

2-6. Parts Layout in Outdoor Unit

Visual representation of parts placement in outdoor units.

2-7. Parts Layout in Inverter Assembly

Visual representation of parts within the inverter assembly.

2-8. Outdoor (Inverter) Print Circuit Board

Explains the layout of the outdoor inverter circuit board.

3. REFRIGERANT PIPING SCHEMATIC DRAWING

4. COMBINED REFRIGERANT PIPING SYSTEM SCHEMATIC DIAGRAMS

4-1. Refrigerant Flow (Cooling)

Illustrates the refrigerant flow during cooling operation.

4-2. Refrigerant Flow (Single Defrost)

Illustrates the refrigerant flow during single defrost operation.

4-3. Refrigerant Flow (Heating)

Illustrates the refrigerant flow during heating operation.

4-4. Refrigerant Flow (Individual Defrost)

Illustrates refrigerant flow for individual defrost operations.

4-5-1. (1) Refrigerant Flow (Automatic emergency cooling)

Shows refrigerant flow during automatic emergency cooling.

4-5-2. (1) Refrigerant Flow (Automatic emergency heating)

Shows refrigerant flow during automatic emergency heating.

4-6. Refrigerant Flow (Reclaim)

Illustrates refrigerant flow during the reclaim process.

5. CONTROL OUTLINE

5-1. Outdoor Unit

Details the control functions of the outdoor unit.

6. APPLIED CONTROL AND FUNCTIONS

6-1. Optional connector Specifications of Indoor P.C.Board

Lists specifications for optional indoor P.C. board connectors.

6-2. Test Operation of Indoor Unit

Describes how to perform test operations for indoor units.

6-3. Method to Set Indoor Unit Function DN Code

Explains how to set indoor unit function codes via remote controller.

6-4. Method to set Outdoor Unit Function Code No. (O.DN )

Guides setting outdoor unit function codes using switches or remote controller.

6-5. Applied Control of Indoor Unit

Details control systems using remote location ON/OFF boxes.

6-6. Applied Control of Outdoor Unit

Explains applied controls for outdoor units based on settings.

6-7. Notice Code

Explains how notice codes are displayed and managed.

6-8. System Cooperation Defrosting

Describes how systems cooperate to manage defrosting timing.

6-9. Night operation (Sound reduction control)

Details how to set night operation for reduced sound levels.

7. TEST OPERATION

7-1. Procedure and Summary of Test Operation

Provides an overview and steps for test operations.

7-2. Check Items before Test Operation (before powering-on)

Lists essential checks before starting test operations.

7-3. Check at Main Power-on

Steps to check the system after main power is turned on.

7-4. Address Setup

Procedures for setting system addresses.

7-5. Troubleshooting in Test Operation

Addresses issues encountered during test operations.

7-6. Test Operation Check

Procedures to check system operation after test run.

7-7. Service Support Function

Provides functions for service support and troubleshooting.

7-8. Wave Tool Advance for SMMS-u Series

Information on using the Wave Tool Advance application.

8. TROUBLESHOOTING

8-1. Overview

Provides an overview of troubleshooting procedures and tools.

8-2. Troubleshooting method

Explains how to use check codes for troubleshooting.

8-3. Troubleshooting based on information displayed on remote controller

Troubleshooting based on remote controller displays and history.

8-4. Check Codes Displayed on Remote Controller and SMMS-u Outdoor Unit (7-Segment Display on I/F Board) and Locations to Be Checked

Lists check codes and locations for troubleshooting.

8-5. Diagnosis procedure for each check code

Flowcharts for diagnosing specific check codes.

8-6. 7-Segment Display Function

Explains the function and usage of the 7-segment display.

8-7. Oil Level Judgment Display

How to check compressor oil levels using the display.

8-8. SMMS-u Outdoor Interface P.C. Board Function Setting Change Table

Table detailing DIP switch and function settings.

8-9. Leakage/Clogging of Refrigerating Cycle Circuit

Identifies check codes related to refrigerant or oil circuit issues.

9. BACKUP OPERATION (EMERGENCY OPERATION)

9-1. Note for Backup Operation

Important notes and considerations for backup operations.

9-2. Compressor Backup Operation Setting

Procedure for setting compressor backup operation.

9-3. Outdoor Unit Backup Operation Setting

Procedures for setting outdoor unit backup operation.

9-4. Cooling-Season Outdoor Unit Backup Operation Setting

Specific backup operation settings for cooling season.

9-5. Outdoor Unit Automatic Backup Operation Outline

Overview of the automatic backup operation function.

10. OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

10-1. Refrigerant Recovery from Troubled Outdoor Unit (Reclaim)

Methods for reclaiming refrigerant from faulty outdoor units.

10-2. How to Operate System While Troubled Outdoor Unit Being Repaired

Guides system operation while a unit is under repair.

10-3. Work procedure after Repair

Steps to follow after completing repairs, including vacuuming.

11. REPLACING COMPRESSORS

11-1. Compressor Replacement Procedure (Outline)

Outlines the general steps for compressor replacement.

11-2. Replacement of Compressors

Detailed steps for replacing compressors and adjusting oil.

11-3. Check Procedure to Search Cause of Compressor Oil Shortage

Diagnosing causes of compressor oil shortage.

12. OUTDOOR UNIT PARTS REPLACEMENT METHODS

13. P.C. BOARD REPLACEMENT PROCEDURES

13-1. Replacement of outdoor P.C. board & Inverter Parts

Lists service parts for outdoor PC boards and inverters.

14. EXPLODED DIAGRAM/PARTS LIST

14-1. Outdoor unit (8, 10, 12, 14HP)

Exploded diagram and parts list for 8-14HP outdoor units.

14-2. Outdoor unit (14A, 16, 18, 20HP)

Exploded diagram and parts list for 14A-20HP outdoor units.

14-3. Outdoor unit (22, 24HP)

Exploded diagram and parts list for 22-24HP outdoor units.