Toshiba MMY-MUP1201HT8P-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-MUP1201HT8P-A Specifications

General

Brand	Toshiba
Model	MMY-MUP1201HT8P-A
Category	Air Conditioner
Language	English

Summary

SAFETY CAUTION

Definition of Qualified Installer or Qualified Service Person

Precautions for Safety

Provides critical safety warnings for handling electrical shock, high voltage, and general safety.

General Safety Warnings

Covers warnings for all types of work, electrical work, working at heights, and handling units.

Prohibitions and Specific Precautions

REFRIGERANT (R410A)

Safety Caution Concerned to Refrigerant (R410A)

Highlights the high pressure of R410A and precautions to prevent accidents.

Cautions on Installation/Service

1. WIRING DIAGRAMS

MMY-MUP0801*, MUP1001*, MUP1201*, MUP1401* Wiring

Provides detailed wiring diagrams for specific outdoor unit models.

2. PARTS RATING

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

Lists parts and their specifications for 50Hz outdoor units, indicating model compatibility.

2-2. Outdoor Unit (60Hz model: MMY-MUP***1HT7(J)P)

Lists parts and their specifications for 60Hz outdoor units, indicating model compatibility.

2-3. Outdoor Unit (50Hz model: MMY-MUP***1HT8P-A)

Lists parts and their specifications for 50Hz outdoor units with "-A" suffix, indicating model compatibility.

2-5. Inverter Assembly

2-6. Parts Layout in Outdoor Unit

2-7. Parts Layout in Inverter Assembly

3. REFRIGERANT PIPING SCHEMATIC DRAWING

Outdoor unit refrigerant flow

Illustrates the refrigerant flow paths for various outdoor unit models in different operational states.

4. COMBINED REFRIGERANT PIPING SYSTEM SCHEMATIC DIAGRAMS

4-1. Refrigerant Flow (Cooling)

Shows refrigerant flow diagrams for header and follower units during cooling operation.

4-2. Refrigerant Flow (Single Defrost)

Illustrates refrigerant flow during single defrost operation for outdoor units.

4-3. Refrigerant Flow (Heating)

Depicts refrigerant flow diagrams for header and follower units during heating operation.

4-4. Refrigerant Flow (Individual Defrost)

Illustrates refrigerant flow during individual defrost operation for header and follower units.

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

Shows refrigerant flow for automatic emergency cooling operation under header and follower unit conditions.

(2) Refrigerant Flow (Manual emergency cooling)

Illustrates refrigerant flow for manual emergency cooling operation under header and follower unit conditions.

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

Depicts refrigerant flow for automatic emergency heating operation under header and follower unit conditions.

(2) Refrigerant Flow (Manual emergency heating)

Shows refrigerant flow for manual emergency heating operation under header and follower unit conditions.

4-6. Refrigerant Flow (Reclaim)

Illustrates refrigerant flow during the reclaim operation for outdoor units.

5. CONTROL OUTLINE

5-1. Outdoor Unit

2. Outdoor fan control

5. Oil recovery control

6. Heating refrigerant (oil) recovery control

7. Defrosting control (Reverse defrosting method)

Explains the reverse defrosting method and conditions for initiating defrost operations.

8. Release valve control

12. Inverter P.C. board control for compressor

5-2. Indoor Unit

6. Air speed selection

7. Prevention of cold air discharge

8. Freeze prevention control (Low temp. release)

18. Louver control

6. APPLIED CONTROL AND FUNCTIONS

6-2. Test Operation of Indoor Unit

Explains how to perform test operations on indoor units individually without external connections.

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

Provides step-by-step instructions for setting indoor unit function codes (DN codes) using wired remote controllers.

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

Details the procedure for setting outdoor unit function codes (O.DN) using interface board switches or wired remote controllers.

6-6. Applied Control of Outdoor Unit

6-6-1. Outdoor Fan High Static Pressure Shift

Explains how to enable the outdoor fan high static pressure function for duct installation.

6-6-2. Priority Operation Mode Setting

Details the four patterns of priority operation mode settings for cooling and heating.

6-6-3-1. Power peak-cut Control (Standard)

Explains the standard power peak-cut control settings using DIP switches and DN codes.

6-6-3-2. Power peak-cut Control (Extended)

Details the extended power peak-cut control settings using DIP switches and DN codes.

6-6-3-3. Snowfall Fan Control

6-6-3-4. External master ON/OFF Control

6-6-3-5. Night operation (sound reduction) Control

Details the night operation function for reduced outdoor unit sound during quiet operation times.

6-6-3-6. Operation Mode Selection Control

6-7. Notice Code

Explains the notice code function for indicating caution or maintenance requirements.

6-8. System Cooperation Defrosting

6-9. Night operation (Sound reduction control)

Explains how to set the night operation time for reduced outdoor unit sound.

7. TEST OPERATION

7-1. Procedure and Summary of Test Operation

Outlines the step-by-step procedure for performing test operations on the system.

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

Lists essential checks for electric wiring and installation before initiating test operation.

7-3. Check at Main Power-on

Details checks to perform on outdoor and indoor units after main power is turned on.

7-4. Address Setup

Explains the procedure for setting addresses for indoor and outdoor units.

7-4-1. Precautions

7-4-2. Address Setup and Check Procedure

Details the steps for setting addresses and checking system information via the interface P.C. board.

7-4-3. Address Setup Procedure

Guides on setting DIP switches for header outdoor unit address and related configurations.

2-2. Line (system) address setting

4. Open the access door cover and follow the steps below to set the address.

Manual address setup from the remote controller

Provides step-by-step instructions for manually setting addresses using a wired remote controller.

Resetting the address (Resetting to the factory default (address undecided))

Communication setting

Details the procedure for setting up TU2C-Link or TCC-Link communication between units.

7-4-4. Check after Address Setup when Central Control System Is Connected

7-5. Troubleshooting in Test Operation

Provides troubleshooting steps for issues encountered during test operation, including check codes.

7-5-1. A Check Code is Displayed on the Remote Controller

7-5-2. No Remote Controller Response with Check Code

7-5-3. No Remote Controller Response without Check Code

7-5-4. Connected Indoor/Outdoor Unit Quantity Check

7-6. Test Operation Check

7-6-1. Fan Check

7-6-2. Cooling/Heating Test Operation Check

Explains how to perform cooling and heating test operations using remote controllers and the outdoor unit interface.

7-7. Service Support Function

7-7-1. Check Function for Connecting of Refrigerant and Control Lines

7-7-2. Function to Start/Stop (ON/OFF) Indoor Unit from Outdoor Unit

7-7-3. Check Code Clearing Function

7-7-4. Remote Controller Distinction Function

7-7-5. Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit

7-7-6. Pulse Motor Valve (PMV) Forced Open/Close Function and Solenoid valve Forced ON Function in Outdoor Unit

7-7-7. Fan Operation Check in Outdoor Unit

7-7-8. Abnormal Outdoor Unit Discrimination Method By Fan Operating Function

7-7-9. Manual Adjustment Function of Outside Temperature (TO) Sensor

7-8-3. Valid/Prohibition/Permission setting for Test operation from WTA App.

8. TROUBLESHOOTING

8-1. Overview

Provides an overview of applicable models, tools, and general troubleshooting behaviors.

8-2. Troubleshooting method

Explains how to analyze check codes detected by various devices to identify problems.

List of Check Codes (Indoor Unit)

List of Check Codes (Outdoor Unit)

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

Guides on troubleshooting based on check codes and history displayed on the remote controller.

Using indoor unit indicators (receiving unit light block) (wireless type)

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

Correlates check codes displayed on remote controllers and outdoor units with specific locations and causes.

8-5. Diagnosis procedure for each check code

Provides detailed diagnostic flowcharts for various check codes to identify and resolve issues.

8-6. 7-Segment Display Function

8-7. Oil Level Judgment Display

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

8-9. Leakage/Clogging of Refrigerating Cycle Circuit

8-10. Sensor Characteristics

8-11. Pressure Sensor Output Check

9. BACKUP OPERATION (EMERGENCY OPERATION)

9-1. Note for Backup Operation

9-2. Compressor Backup Operation Setting

Explains the procedure for setting compressor backup operation when one compressor fails.

9-3. Outdoor Unit Backup Operation Setting

Details how to set up backup operation for outdoor units when a unit fails.

9-3-1. Follower outdoor unit backup operation setting (failure of follower outdoor unit)

Provides the step-by-step procedure for setting backup operation for a failed follower outdoor unit.

9-3-2. Header outdoor unit backup operation setting (failure of header outdoor unit)

Outlines the procedure for setting backup operation for a failed header outdoor unit.

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

9-5. Outdoor Unit Automatic Backup Operation Outline

10. OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

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

Details the method for recovering refrigerant from a troubled outdoor unit for repair.

10-1-1. Note for refrigerant recovery operation

10-1-2. Refrigerant recovery procedure A (Case that the troubled outdoor unit turn on)

Outlines the procedure for refrigerant recovery when the troubled outdoor unit can be powered on.

10-1-3. Refrigerant recovery procedure B (Case that the troubled outdoor unit does not turn on)

Details the refrigerant recovery procedure when the troubled outdoor unit cannot be powered on.

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

10-3. Work procedure after Repair

11. REPLACING COMPRESSORS

11-1. Compressor Replacement Procedure (Outline)

Outlines the general procedure for replacing compressors, including safety warnings.

11-2. Replacement of Compressors

Details how to check compressor oil color and adjust oil amounts for new compressors.

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

13. P.C. BOARD REPLACEMENT PROCEDURES

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

13-1-1. List of service parts (Inverter)

13-1-2. Configuration of inverter assembly

13-1-3. Interface P.C. Board (MCC-1747) Replacement Procedure

13-1-4. Compressor P.C. Board (MCC-1729) Replacement Procedure

13-1-5. Fan-Motor P.C. Board (MCC-1734) Replacement Procedure

13-1-6. Noise Filter P.C. Board 1 (MCC-1748) Replacement Procedure

13-1-7. Noise Filter P.C. Board 2 (MCC-1748) Replacement Procedure

14. EXPLODED DIAGRAM/PARTS LIST

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

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

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