TOSHIBA RAS-16BKV-E (01) PDF Document

The TOSHIBA RAS-16BKV-E adopts the new HFC refrigerant (R410A) which does not destroy the ozone layer. The following precautions must be observed:

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times that of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping.

The following tools are exclusive for R410A or have specific compatibility requirements for the TOSHIBA RAS-16BKV-E:

To perform flare processing for the TOSHIBA RAS-16BKV-E:

1. Cut the Pipe: By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

2. Remove Burrs and Chips: If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and clean the cut surface before installation.

3. Insertion of Flare Nut: Insert the flare nut.

4. Flare Processing: Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or a conventional flare tool. Flare processing dimensions differ according to the type of flare tool. When using a conventional flare tool, be sure to secure the specific “dimension A” by using a gauge for size adjustment.

When it is necessary to recharge refrigerant for the TOSHIBA RAS-16BKV-E, charge the specified amount of new refrigerant according to the following steps:

1. Recover the refrigerant, and check no refrigerant remains in the equipment.

2. Connect the charge hose to packed valve service port at the outdoor unit’s gas side.

3. Connect the charge hose to the vacuum pump adapter.

4. Open fully both packed valves at liquid and gas sides.

5. Place the handle of the gauge manifold Low in the fully opened position, and turn on the vacuum pump’s power switch. Then, evacuating the refrigerant in the cycle.

6. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.

7. Keep the status as it is for 1 to 2 minutes, and ensure that the compound gauge’s pointer does not return.

8. Set the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and charge liquid refrigerant.

Note: Never charge refrigerant exceeding the specified amount. If the specified amount cannot be charged, charge refrigerant bit by bit in COOL mode. Do not carry out additional charging.

This function is not set to work when shipped from the factory. To set the auto restart function on the TOSHIBA RAS-16BKV-E, proceed as follows:

1. The power supply to the unit must be on; the function will not set if the power is off.

2. Press the [RESET] button located in the center of the front panel continuously for three seconds.

3. The unit receives the signal and beeps three times.

The unit then restarts operating automatically in the event of power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored.

To cancel the auto restart function on the TOSHIBA RAS-16BKV-E:

1. Repeat the setting procedure: Press the [RESET] button located in the center of the front panel continuously for three seconds.

2. The unit receives the signal and beeps three times.

The unit will be required to be turned on with the remote controller after the main power supply is turned off.

To decrease the display lamp brightness or turn it off on the TOSHIBA RAS-16BKV-E:

1. Press and hold the FAN button on the remote controller for 3 seconds until brightness level (d0, d1, d2, or d3) is shown on the remote controller display.

2. Press the TEMP button to rise or decrease the brightness in 4 levels:

– d3: Lamp illuminates full brightness (100%).

– d2: Lamp illuminates 50% brightness.

– d1: Lamp illuminates 50% brightness and the operation lamp is turned off.

– d0: All lamps are turned off.

The Self-Cleaning operation on the TOSHIBA RAS-16BKV-E minimizes mold and bacteria growth by drying the inside of the unit.

Operation:

1. When the unit is performing cooling or dry operation, press the “STOP” button on the remote controller.

2. Only the timer indicator lights, and Self Cleaning operation starts.

3. The louver opens slightly, and the indoor fan operates continuously at a speed of 500 rpm.

4. After the time set elapses (approx. 20 minutes if operated for more than 10 minutes), the operation stops automatically.

To Stop Immediately: Press the start/stop button on the remote controller twice during the Self-Cleaning operation.

To set or cancel the Self-Cleaning function on the TOSHIBA RAS-16BKV-E:

1. Set diagnosis code “06” on the remote controller.

2. Turn on the power supply to the air conditioner.

3. Press the [RESET] button on the air conditioner 1 time to turn on the air conditioner (The LED display will show in green color).

4. Point the remote controller at the LED display on the air conditioner, and press the up button at TEMP of the remote controller 1 time to send the code “07” (Within 3 seconds after pressing the [RESET] button).

5. The air conditioner will shutdown automatically.

6. When the setting is changed, the sound warning will alarm “Beep”.

7. Turn on the air conditioner again by remote controller to confirm the setting.

To separate using of remote control for each indoor unit in case of 2 air conditioners installed nearby (setting Remote Control B):

1. Press the RESET button on the indoor unit to turn the air conditioner ON.

2. Point the remote control at the indoor unit.

3. Push and hold the CHK (Check) button on the Remote Control by the tip of a pencil. “00” will be shown on the display.

4. Press MODE during pushing CHK. “B” will show on the display and “00” will disappear and the air conditioner will turn OFF. The Remote Control B is memorized.

To execute self-diagnosis using the remote controller for the TOSHIBA RAS-16BKV-E:

1. Press the [CHECK] button with a tip of a pencil to set the remote controller to the service mode. “00” is indicated on the display.

2. Press [TEMP UP] or [TEMP DOWN] button. If there is no fault with a code, the indoor unit will beep once (Beep) and the display of the remote controller will change.

3. The TIMER indicator of the indoor unit flashes continuously (5 times per 1 sec).

4. Check the unit with all 52 check codes (00 to 33) as shown in the manual’s table.

5. If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep…). Note the check code on the display.

6. Press [CLEAR] button to release the service mode and return to normal operation.

Check the flare nut connections for the gas leak with a gas leak detector or soap water. Check places for the indoor unit (flare nut connection) and check places for the outdoor unit.

1. Stop operation of the air conditioner and turn off its main power supply.

2. Open the air inlet grille and push it up until the air inlet grille takes off.

Remark: If you do not have enough space to push the air inlet grille up until it takes off, you can push the arms of the air inlet grille toward the outside, and remove the air inlet grille.

1. Stop operation of the air conditioner and turn off its main power supply.

2. Open two screw caps and securely remove screws (2 pcs.) at the front panel.

3. Take off the hooks of the front panel from the top side of the back body.

4. Slightly open the lower part of the front panel then pull the upper part of the front panel toward you to remove it.

1. Follow the procedure to remove the front panel and electric part box assembly.

2. Loosen the set screw of the cross flow fan (using a Hexagon screw driver).

3. Remove 2 fixing screws of the motor band.

4. Pull the motor band and the fan motor outward.

Note for re-installation: Check the type name of the fan motor. Keep connector position and arrange fan motor wires as per the diagram in the manual.

Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit.

1. Connect the charge hose from the manifold valve to the service port of the gas side packed valve.

2. Connect the charge hose to the port of the vacuum pump.

3. Open fully the low pressure side handle of the gauge manifold valve.

4. Operate the vacuum pump to start evacuating. Perform evacuating for about 15 minutes if the piping length is 20 meters (assuming a pump capacity of 27 liters per minute).

5. Confirm that the compound pressure gauge reading is -101 kPa (76 cmHg).

6. Close the low pressure side valve handle of the gauge manifold.

7. Open fully the valve stem of the packed valves (both side of Gas and Liquid).

8. Remove the charging hose from the service port.

9. Securely tighten the caps on the packed valves.

If the outdoor fan motor does not rotate, stops shortly after starting, or rotates abnormally, perform this simple judgment:

1. Turn OFF the breaker.

2. Disconnect two connectors (CN31) of the outdoor fan motor from the outdoor P.C. board.

3. Rotate the fan with hands. If it does not rotate without trouble, the fan motor is abnormal.

4. If it rotates freely, check the resistance values between the connector pins (CN31: Motor winding):

– Resistance between (1) Red lead and (2) White lead.

– Resistance between (2) White lead and (3) Black lead.

– Resistance between (3) Black lead and (1) Red lead.

5. If the resistance is 16 to 51 ohms, the fan motor is normal (Outdoor P.C. board error). If not, the fan motor is in error.