TOSHIBA CARRIER MMY-MUP1441HT6P-UL (01) PDF Document

When undertaking specific tasks on the TOSHIBA CARRIER MMY-MUP1441HT6P-UL, the following protective gear must be worn to prevent injury, burns, or electric shocks:

All types of work: Protective gloves and safety working clothing.

Electrical-related work: Gloves to provide protection for electricians, insulating shoes, and clothing to provide protection from electric shock.

Work done at heights (50 cm or more): Helmets for use in industry.

Transportation of heavy objects: Shoes with additional protective toecap.

Repair of outdoor unit: Gloves to provide protection for electricians.

The following table lists the required screw sizes and tightening torques for the TOSHIBA CARRIER MMY-MUP1441HT6P-UL:

The additional amount of refrigerant charge for the TOSHIBA CARRIER MMY-MUP1441HT6P-UL is calculated using the following formula: [1] + [2] + [3] + [4].

[1] Compensation amount based on outdoor unit capacity: For a 144 capacity type unit, the compensation is 0.33 lbs (0.15 kg).

[2] Additional charge based on liquid pipe size: Real length of liquid pipe multiplied by the additional charge amount per foot.

[3] Additional amount of refrigerant for indoor unit: This is based on the indoor unit capacity type. For standard units, the values are:

Capacity 007 to 009: 0.44 lbs (0.2 kg)

Capacity 012 to 027: 0.88 lbs (0.4 kg)

Capacity 030 to 054: 1.32 lbs (0.6 kg)

Capacity 072 to 096: 2.20 lbs (1.0 kg)

[4] Corrected amount based on outdoor unit diversity: If diversity is 95% or higher, the correction is 0. If diversity is between 50% and 60%, the correction is -5.51 lbs (-2.5 kg).

To set up addresses automatically for the TOSHIBA CARRIER MMY-MUP1441HT6P-UL, follow these steps:

Step 1. Turn on the indoor units first, then turn on the outdoor units.

Step 2. Wait approximately 1 minute for the 7-segment display on the header outdoor unit interface board to indicate U.1. Err and L08 alternately.

Step 3. Push SW06 on the header unit interface board for more than 1 second to start the automatic address setting. This process typically takes about 5 to 10 minutes.

Step 4. The display will cycle through Auto 1, Auto 2, and Auto 3. The setup is complete when the display changes to U.1. – – – (flashing or light).

The priority operation mode for the TOSHIBA CARRIER MMY-MUP1441HT6P-UL is configured using the outdoor unit Function Code (O.DN) [18]. The settings are as follows:

O.DN [18] = 0000: Priority heating (factory default).

O.DN [18] = 0001: Priority cooling.

O.DN [18] = 0002: Priority operation based on the number of units in operation (mode with the largest share of units wins).

O.DN [18] = 0003: Priority indoor unit (priority given to the mode of a specific designated indoor unit).

To initiate a cooling test run directly from the TOSHIBA CARRIER MMY-MUP1441HT6P-UL header unit:

Step 1. Set the rotary switches SW01/SW02/SW03 to [2/5/1]. The display will show C. on Section A.

Step 2. Push the push-switch SW04 for 2 seconds or more. The test operation will start.

Step 3. Verify that the remote controllers of the indoor units display Test run and Section B of the outdoor board shows – C.

Step 4. To stop the test, return rotary switches SW01/SW02/SW03 to [1/1/1] or push SW05 for 2 seconds or more.

The following check codes may appear during operation of the TOSHIBA CARRIER MMY-MUP1441HT6P-UL:

Night Operation reduces the sound of the TOSHIBA CARRIER MMY-MUP1441HT6P-UL by limiting capacity. Using the RBC-AWSU** remote control:

Step 1. Push the Menu button and navigate to Night operation.

Step 2. Select 1. Night operation and set it to ON.

Step 3. Select 2. Start time to set the beginning of the quiet period (e.g., 22:00).

Step 4. Select 3. End time to set the conclusion of the quiet period (e.g., 06:00).

Note: Capacity is typically reduced to approximately 85% in cooling and 70% in heating during this mode.

To clear currently detected check codes without resetting the power on the TOSHIBA CARRIER MMY-MUP1441HT6P-UL:

Step 1. Set the rotary switches SW01/SW02/SW03 to [2/16/1]. The display will show Er on Section A.

Step 2. Push the push-switch SW04 for 5 seconds or more.

Step 3. The display will show CL on Section B for 5 seconds, indicating that the codes are cleared. Check code detection will then perform again.

If a follower outdoor unit fails in a multi-outdoor unit system, follow these steps for the TOSHIBA CARRIER MMY-MUP1441HT6P-UL:

Step 1. Fully close the gas pipe service valve of the failed follower unit.

Step 2. Leave the liquid pipe service valve fully open to prevent refrigerant stagnation.

Step 3. On the header unit interface board, turn on Bit 3 of SW103. This setting prevents E16 (indoor unit capacity over) failure during backup operation.

Step 4. Clear the failure from the header unit by setting SW01/02/03 to [2/16/1] and pushing SW04 for 5 seconds until Er CL appears.

Step 5. Return switches to [1/1/1]. The system will now operate using only the remaining units.

If the troubled TOSHIBA CARRIER MMY-MUP1441HT6P-UL can be energized, use Procedure A:

Step 1. Connect the liquid pipe check joint to the low pressure-side check joint with a charge hose and purge it of air.

Step 2. Fully close the liquid pipe service valve of the troubled unit, while leaving the gas pipe service valve open.

Step 3. Set SW01/02/03 on the troubled unit interface board to [2/11/1]. The display will show rd.

Step 4. Push SW04 for 5 seconds or more. rd FF will appear, and reclaim operation starts.

Step 5. After approximately 20 minutes, fully close the gas pipe service valve.

Step 6. Push SW05 to finish the operation, then turn off power and recover residual gas with a recovery device.