TOSHIBA MMD-AP0306BHP-TR (01) PDF Document

The specifications for the TOSHIBA MMD-AP0306BHP-TR are as follows:

50Hz Operation:

60Hz Operation:

The parts ratings for the TOSHIBA MMD-AP0306BHP-TR are as follows:

When the power supply to your TOSHIBA MMD-AP0306BHP-TR is reset, the following occurs:

1. Identification of outdoor unit: The outdoor unit is identified, and control is redirected according to the identification result.

2. Indoor fan speed and air flow direction control availability settings: Settings such as indoor fan speed and air flow direction control availability are replaced on the basis of EEPROM data.

3. Fault code clearing: If the power supply reset is performed in the wake of a fault, the check code is cleared. If the abnormality persists after the Start / Stop button on the remote controller is pressed to resume operation, the check code is redisplayed on the remote controller.

The room temperature control for the TOSHIBA MMD-AP0306BHP-TR has the following settings:

1. Adjustment range – remote controller temperature setting (°C):

2. Fine-tuning in heating operation: The temperature setting may be fine-tuned via the DN code “06”.

The fan on your TOSHIBA MMD-AP0306BHP-TR operates in one of four speed modes: “HIGH (HH)”, “MED (H)”, “LOW (L)”, and “AUTO”, based on the command from the remote controller. In AUTO fan speed mode, the air speed changes according to the difference between the ambient temperature (Ta) and the set temperature (Ts).

Cooling Operation in AUTO mode:

• The fan speed changes based on the temperature difference (Ta – Ts).

• In AUTO fan speed mode, the fan speed remains the same for 3 minutes each time a speed change occurs. However, a manual speed change command from the remote controller will override this.

• At the beginning of cooling, a higher speed is chosen for a steeper downward temperature gradient.

• As long as the temperature difference remains on a boundary line, the fan speed stays the same.

Heating Operation in AUTO mode:

• The fan speed changes based on the temperature difference (Ta – Ts).

• In AUTO fan speed mode, the fan speed remains the same for 1 minute each time a speed change occurs. A manual change can override this.

• At the beginning of heating, a higher speed is chosen for a steeper upward temperature gradient.

• When the indoor heat exchanger sensor (TC2) temperature is ≥ 60 °C, the fan speed is raised by one step.

• If the air conditioner goes thermo OFF during heating, the fan speed drops to LL (breeze).

During heating operation, the cold air discharge prevention control on your TOSHIBA MMD-AP0306BHP-TR sets the upper limit of the fan tap based on the indoor heat exchanger sensor temperatures (TC1, TC2, TCJ). This prevents cold air from blowing into the room.

The fan speed is controlled based on the following temperature zones:

• Zone A (below 26°C): Fan OFF. “HEATING STANDBY” is displayed on the remote.

• Zone B (26°C to below 28°C): Breeze speed.

• Zone C (28°C to below 30°C): Low speed.

• Zone D (30°C to below 32°C): Medium speed.

• Zone E (32°C and above): High speed.

If the fan operates continuously in Zone B for 6 minutes, it automatically moves to Zone C. During defrosting, the control point is shifted by +6 °C.

During cooling operation on your TOSHIBA MMD-AP0306BHP-TR, the freeze prevention control operates based on the readings of the indoor heat exchanger sensors (TC1, TC2, TCJ) to prevent the coil from freezing.

Control Logic 1:

• If the unit operates in the “J zone” (e.g., TC1 at 0°C, TC2/TCJ at -14°C) for 5 minutes, it is forced into thermo OFF.

• If it operates in the “K zone”, a timer is paused.

• If it operates in the “I zone” (e.g., TC1 at 10°C, TC2/TCJ at -10°C), the timer is cleared, and the unit returns to normal operation.

• If continuous operation in the J zone forces a thermo OFF, the indoor fan operates in breeze mode until it moves into the I zone.

• This control terminates when TC1, TC2, and TCJ are all ≥ 12°C, or after 20 minutes of stoppage.

Control Logic 2:

• If the unit operates in the “M zone” (e.g., TC2/TCJ at -2.0°C) for 45 minutes, it is forced into thermo OFF.

• In the “N zone”, a timer is paused. When returning to the M zone, the timer count resumes.

• In the “L zone” (e.g., TC2/TCJ at 5°C), the timer is cleared, and the unit returns to normal operation.

• This control resets when TC1, TC2, and TCJ are all ≥ 12°C, or after 20 minutes of stoppage.

The drain pump control on your TOSHIBA MMD-AP0306BHP-TR works as follows to remove condensed water:

1. During cooling (including DRY operation), the drain pump is operated at all times.

2. If the float switch is activated while the drain pump is in operation, the drain pump continues operating, and the check code [P10] is displayed.

3. If the float switch is activated while the drain pump is turned off, the air conditioner is forced into thermo OFF, and the drain pump is put into operation. If the float switch remains activated for about 5 minutes, the drain pump is turned off, and the check code [P10] is displayed.

To use the power saving mode on your TOSHIBA MMD-AP0306BHP-TR, follow these steps:

1. Push the SAVE button on the remote controller.

2. The “SAVE” segment lights up on the wired remote controller display.

3. The requirement capacity ratio is limited to approximately 75%.

4. If the power saving operation is enabled, the settings are retained when the operation is stopped, the mode is changed, or when the power is reset. The power saving operation will be enabled the next time the operation starts.

Note: This function cannot be set by a wireless remote controller or older wired models like the AMT31E.

In case of wired remote controller:

1. Push the [CHK] button for 4 seconds or more. [TEST] will be displayed on the screen, and the unit will enter Test run mode.

2. Push the [ON/OFF] button.

3. Using the [MODE] button, set the mode to [COOL] or [HEAT]. Do not use any other mode.

4. After the test run, push the [ON/OFF] button to stop the operation.

5. Push the [CHK] button to clear the test run mode. The [TEST] display will disappear, and the status will return to normal.

In case of wireless remote controller:

1. When the TEMPORARY button is pushed for 10 seconds or more, a “Pi!” sound is heard, and the operation changes to test run. After approximately 3 minutes, a cooling operation starts forcibly. Check that cool air starts blowing.

2. To stop the test operation, push the TEMPORARY button once again (for approximately 1 second).

The TOSHIBA MMD-AP0306BHP-TR has a check function to test the indoor unit singly without communication with the remote controller or outdoor unit. This function should be used for only a few minutes to avoid causing trouble.

How to operate:

1. Short-circuit the CHK pin (CN71 on the indoor P.C. board). The operation mode will differ depending on whether the unit status is normal (both float switch and fan motor are normal) or abnormal (either float switch or fan motor is abnormal).

2. During normal time, if you also short-circuit the DISP pin (CN72 on the indoor P.C. board), the minimum opening degree (30 pls) can be set for the indoor PMV. When the DISP pin is open, the maximum opening degree (1500 pls) can be obtained.

How to clear:

Open the CHK pin. The system will stop once and then automatically return to operation after several minutes.

To set the indoor unit function DN code on your TOSHIBA MMD-AP0306BHP-TR, you must use a wired remote controller and the system must be at rest. Follow this procedure:

1. Push the SET, TEMP up, and CL buttons simultaneously and hold for at least 4 seconds. The unit No. displayed first is the address of the header indoor unit in group control. The fan and louver of the selected indoor unit will move.

2. Each time the UNIT LOUVER button (left side) is pressed, one of the indoor unit Nos. under group control is displayed in turn. The fan and louver of the selected unit will move.

3. Use the TEMP buttons to select the desired CODE No. (DN code) of the function you want to change.

4. Use the TIME buttons to select the desired SET DATA associated with the selected function.

5. Push the SET button. The display will change from flashing to steady.

6. When the CL button is pushed, the system returns to the normal off state.

To set the addresses manually, you need to pair the indoor unit with a remote controller one-to-one. Turn on the power and follow these steps:

1. Push and hold the SET, CL, and TIME UP buttons at the same time for more than 4 seconds. The LCD will start flashing.

Set Line (system) address:

2. Push the TEMP buttons repeatedly to set the CODE No. to 12.

3. Push the TIME buttons repeatedly to set a system address. (This must match the address on the interface P.C. board of the header outdoor unit in the same refrigerant line.)

4. Push the SET button.

Set Indoor unit address:

5. Push the TEMP buttons repeatedly to set the CODE No. to 13.

6. Push the TIME buttons repeatedly to set an indoor unit address.

7. Push the SET button.

Set Group address:

8. Push the TEMP buttons repeatedly to set the CODE No. to 14.

9. Push the TIME buttons repeatedly to set a group address. Use 0000 for an individual unit, 0001 for a header unit, or 0002 for a follower unit.

10. Push the SET button.

11. Push the CL button. The address setting is complete. The word “SETTING” will flash and then disappear.

NOTE: Do not use address numbers 29 or 30 for system addresses as they cannot be used on outdoor units and will cause an [E04] error.

Clearing an error of the outdoor unit:

This procedure clears the currently detected outdoor unit error for the connected refrigerant line. The indoor unit error is not cleared.

1. Push and hold the CL and VENT buttons for 4 seconds or longer to enter the service monitoring mode.

2. Push the TEMP button to set the CODE No. to “FF”.

3. The display will count down from “0005” to “0000” at 5-second intervals. The error is cleared when “0000” appears.

4. Push the VENT button to return the display to normal.

Clearing an error of the indoor unit:

Push the ON/OFF button on the remote controller. Only the error of the indoor unit controlled by that remote controller will be cleared.

You can use the service monitoring mode on the RBC-ATM32E remote controller to check sensor temperatures and operation status.

1. Push and hold the VENT and CL buttons for 4 seconds or longer to enter the service monitoring mode. The service monitor lights up, and the temperature for CODE No. 00 appears first.

2. Push the TEMP button to change the CODE No. of the item you want to monitor.

3. Push the left part of the UNIT LOUVER button to change the item to monitor. This allows you to view sensor data from the indoor unit and outdoor unit in the refrigerant line.

4. Push the VENT button to return the display to normal.

Monitored Data (Indoor Unit):

Before assuming a fault with your TOSHIBA MMD-AP0306BHP-TR, check for these normal behaviors:

A microprocessor malfunction due to poor power quality or external noise can also mimic a fault. Check for possible noise sources and ensure proper shielding of remote controller and signal wires.

The following table lists check codes detected by the indoor unit of your TOSHIBA MMD-AP0306BHP-TR and their descriptions. The indicator light block refers to the lights on the wireless receiver.

To detach the air filter from your TOSHIBA MMD-AP0306BHP-TR, follow these steps. Remember to stop the air conditioner and turn off the breaker first.

1. Detachment:

Slide the filter toward the opposite side of the arrow mark and then pull out the filter. If two filters are provided, pull out the first filter, and then the second filter will be pulled out connected to the first.

2. Attachment:

Insert the filter into the filter rail toward the arrow mark, slide it until it stops, and then fix it. If two filters are provided, insert the second filter in the same direction after inserting the first filter.

To detach the suction panel from your TOSHIBA MMD-AP0306BHP-TR, please follow this procedure:

1. Detachment:

1. Remove the fixing screws A which fix the suction panel. Loosen the fixing screws B.

2. Slide the suction panel to the arrow side and then remove the panel.

2. Attachment:

1. Hook the suction panel to the fixing screws B and tighten screws.

2. Attach the removed screws A to the original positions.

To detach the electric parts box cover from your TOSHIBA MMD-AP0306BHP-TR:

1. Detachment:

1. Remove screw A of the electric parts box cover to loosen screw B.

2. Slide the cover toward the arrow direction and pull it towards you. The cover will open using the hinge part as a shaft.

3. Take off the slit of the electric parts box cover from the projection of the side plate and then remove the cover.

2. Attachment:

1. Hook the slit of the cover to the projection of the side plate, close the cover, enter screw B in the keyhole, and then slide it.

2. Fix the electric parts box cover by tightening screws A and B.