This document is the Owner's Manual for Toshiba Air Conditioners (Multi Type), specifically for Fresh Air Intake Indoor Units. It covers models MMD-UP0481HFP-E, MMD-UP0721HFP-E, MMD-UP0961HFP-E, MMD-UP1121HFP-E, and MMD-UP1281HFP-E. The air conditioner uses R410A refrigerant and is intended for commercial use.
Function Description
The Toshiba Fresh Air Intake Indoor Unit is designed to condition fresh air and introduce it into a room. It can operate in three primary modes: COOL, HEAT, and FAN. In COOL mode, it cools the fresh air before sending it into the room. In HEAT mode, it heats the fresh air. In FAN mode, it simply circulates fresh air without temperature modification. The unit controls the supply air temperature to be close to the set temperature of the remote controller, though actual supply air temperature may vary based on outdoor/suction air conditions and the operation of other indoor units in a multi-line system. It is important to note that this fresh air intake unit cannot control the room temperature directly; a separate indoor unit for air conditioning is required for room temperature control.
Important Technical Specifications
The manual provides sound pressure levels and weight for each model:
- MMD-UP0481HFP-E: Cooling 36 dBA, Heating 36 dBA, Weight 44 kg
- MMD-UP0721HFP-E: Cooling 38 dBA, Heating 38 dBA, Weight 99 kg
- MMD-UP0961HFP-E: Cooling 40 dBA, Heating 40 dBA, Weight 99 kg
- MMD-UP1121HFP-E: Cooling 42 dBA, Heating 42 dBA, Weight 99 kg
- MMD-UP1281HFP-E: Cooling 44 dBA, Heating 44 dBA, Weight 99 kg
The unit uses R410A refrigerant, an environmentally friendly option. It complies with the Machinery Directive (Directive 2006/42/EC) and harmonized standard EN 378-2: 2008+A2: 2012.
Usage Features
The air conditioner is operated via a remote controller with an LCD backlight that illuminates for 15 seconds during operation. The remote controller features:
- ON/OFF button: Turns the unit on or off.
- Setting button: Adjusts the setting temperature (in 1.0°C steps) and changes settings in Operation mode, Fan speed mode, or Wind direction mode.
- OFF timer button: Sets the OFF timer, allowing the unit to stop after a set period (0.5h to 24h).
- Menu button: Selects Operation mode, Fan speed mode, or Wind direction mode.
The remote controller display includes several indicators:
- Operation mode indicator: Shows the selected operation mode (Heat, Cool, Fan).
- Central control indicator: Displays when the unit is centrally controlled, with some remote controller functions potentially restricted.
- Setting indicator: Indicates when the model is being checked automatically.
- Service indicator: Appears during protective device activation or a check.
- Test run indicator: Displayed during test run.
- Temperature setting indicator: Shows the selected set temperature.
- Fan speed indicator: Indicates the selected fan speed (Auto, Low, Low+, Med, Med+, High, Fix).
- OFF timer indicator: Shows the remaining time for the OFF timer.
- Pre-heat indicator: Displayed during heating mode pre-heating or defrost cycle.
- Operation standby indicator: Indicates when simultaneous cooling/heating is not possible in a multi-system or when outdoor temperature is outside the operating range.
- Notice display: Appears when a notice code occurs.
Operation Conditions and Protections:
- COOL mode: If outdoor/suction air temperature is under setup temp. +3°C or under 19°C, FAN status is automatically engaged.
- HEAT mode: If outdoor/suction air temperature is over setup temp. -3°C or over 15°C, FAN status is automatically engaged.
- Protection in COOL/FAN mode: Operation automatically stops if outdoor/suction air temperature is under 5°C to protect equipment. Users should switch to HEAT mode in this case.
- Protection in HEAT mode: Operation automatically stops if outdoor/suction air temperature is under -10°C (*1) to protect equipment. For SMMS-u outdoor units, the operating temperature is -10°C or more; for other outdoor units, it is -5°C or more. If operating below -10°C, a duct heater (locally procured) is recommended.
- Defrosting: During heating, the unit automatically performs defrosting (2-10 minutes) to improve heating efficiency, stopping the indoor fan during this period.
- 3-minute protection: The outdoor unit will not operate for approximately 3 minutes after restart or power-on to protect the system.
- Power failure: All operations stop. To resume, the ON/OFF button must be pushed.
- Protective device (High pressure switch): Automatically stops the unit and blinks the operation lamp if excessive load is applied. This can occur if the outdoor unit's air intake/discharge is blocked or if strong wind blows continuously against the outdoor unit. During heating, it can also activate if the indoor unit's air filter is excessively dirty or the indoor unit's air discharge is blocked. After activation, the power switch should be turned off, the cause removed, and then restarted.
- Simultaneous Cooling/Heating: Indoor units connected to the same outdoor unit cannot perform cooling and heating simultaneously. If attempted, cooling units will stop, and a running preparation indicator will display. Heating units will continue to run.
- Troubleshooting History: The unit records up to 4 incidents. This history can be accessed by pushing the OFF timer button for over 10 seconds. The OFF timer indicator will alternately show the check code and the indoor unit number. The setting button can be used to scroll through the history. Pushing the Menu button for over 10 seconds in this mode will delete the entire history.
Maintenance Features
Daily maintenance, including air filter cleaning, should be performed by a qualified service person, especially for models requiring high-place work.
- Air Filters: Clogged filters can reduce cooling and heating performance.
- Long life prefilter: Dust can be removed with a vacuum cleaner or by rinsing with water. For heavy dirt, a soft brush and neutral detergent can be used. After washing, it should be drained and dried in the shade. Do not wash with water over 50°C, expose to fire, or use harsh chemicals.
- High-efficiency filter: This filter cannot be washed and reused. It should be replaced when due (approximately 2500 hours of operation is recommended), or sooner depending on intake air conditions.
- Indoor unit and remote controller: Wipe with a dry, soft cloth. Avoid benzine, thinner, scouring powder, or chemical cloths as they may cause deformation or breakage.
- If unused for over a month: Run the fan for half a day to dry the inside, then turn off the main power switch and clean the air filter.
- Periodic inspection: After long periods of use, parts may deteriorate, or drainage may worsen. An inspection by the dealer is recommended.
- Drain pan: A qualified service person should clean the drain pan. Without cleaning, the drain pan may fill with waste, leading to water overflow onto the ceiling or floor.
Safety Precautions:
The manual emphasizes several safety precautions:
- Installation, maintenance, repair, and removal must be performed by a qualified installer or service person.
- Only specified R410A refrigerant should be used.
- Wear protective gear (gloves, safety clothing, helmets, safety shoes) during transportation, installation, maintenance, and repair.
- Do not open the intake grille or service panel without turning off the circuit breaker.
- Do not move or repair the unit yourself due to high voltage inside.
- Do not touch the aluminum fin of the outdoor unit.
- Do not climb onto or place objects on the outdoor unit.
- Do not place combustion appliances directly in the path of the air conditioner's wind.
- Ensure proper ventilation when operating with combustion appliances in the same room to prevent oxygen shortage.
- Avoid prolonged direct exposure to cool air.
- Never insert fingers or objects into the air intake or discharge.
- If the unit is not cooling/heating properly, consult the shop as refrigerant leakage may be the cause.
- Turn off the breaker before cleaning.
- If any trouble occurs (e.g., check code, burning smell, abnormal sounds, water leakage), turn off the circuit breaker and contact a qualified service person.
- Do not customize the unit.
- Ensure proper drainage for the drain hose.
- Connect to an exclusive power supply of the rated voltage.
- Fix the outdoor unit securely to its base.
- Do not use the air conditioner for special purposes (e.g., preserving food, breeding animals).
- Do not touch switches with wet fingers.
- Turn off the main switch or circuit breaker if the unit will not be used for a long time.
- Operate within specified temperature ranges.
- Prevent liquids from falling into the remote controller.
- Do not wash the air conditioner.
- Check the installation base for deterioration.
- Do not leave or spray flammable materials near the air conditioner.
- Avoid installing in locations with high-frequency waves, chemical plants, metal dust, salty areas, sulfidizing gas, or heavily acidic/alkaline places without special maintenance.
- Ensure sufficient space around the outdoor unit for ventilation.
- Avoid strong winds against the outdoor unit.
- Install a snow stand/hood in snowfall areas.
- Ensure proper drainage for outdoor unit water.
- Ensure long-life prefilter and high-efficiency filter are installed.
- Maintain distance from TVs/radios (at least 1m) and fire alarms (at least 1.5m).
- Locate the unit in a secure place to minimize sounds and vibrations.
- Be mindful of disturbing neighbors with air discharge or noise.
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