TOSHIBA RAS-05BAV-E (01) PDF Document

The following safety precautions should be observed:

General Public Use: Power supply cord of the outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord.

Refrigerant: This air conditioner adopts the new HFC refrigerant (R410A) which does not destroy the ozone layer. R410A is affected by impurities such as water, oxidizing membrane, and oils. The working pressure is approx. 1.6 times that of R22. Ensure water, dust, former refrigerant, or refrigeration machine oil does not enter the cycle.

Electrical: To disconnect the appliance from the main power supply, it must be connected to a circuit breaker or a switch with a contact separation of at least 3 mm. Turn off the main power supply switch or breaker before unit maintenance.

Installation: Do not install near concentrations of combustible gas or gas vapors. Place the unit more than 2 meters away from heat sources. When moving the unit, be careful not to mix air or other gases into the refrigeration circuit to prevent high pressure and rupture.

High Voltage: High voltage circuits are incorporated. Be careful to do the check service, as electric shock may be caused in case of touching parts on the P.C. board by hand.

It is necessary to use seamless copper pipes made of either copper or copper alloy. The amount of residual oil should be less than 40 mg/10 m. Never use copper pipes thinner than 0.8 mm.

Incorrect tightening torque may cause gas leakage or crack the flare nut. Comply with the following values:

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

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

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

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

When it is necessary to recharge refrigerant, 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 the 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. Evacuate the refrigerant in the cycle.

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

7. Keep the status for 1 to 2 minutes to ensure the pointer does not return.

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

Note: Never charge refrigerant exceeding the specified amount. Charge refrigerant bit by bit in COOL mode if the full amount cannot be charged at once. Do not carry out additional charging (topping off) as it changes the composition of R410A.

The Auto Restart Function allows the unit to restart operating with the set operating conditions in the event of a power supply accidental shutdown. The operation will resume without warning three minutes after power is restored. This function is not set when shipped from the factory.

To Set: Press the [RESET] button located in the center of the front panel continuously for three seconds. The unit receives the signal and beeps three times. (If the unit is on standby, the green indicator flashes for 5 seconds. If operating, the green indicator flashes for 5 seconds).

To Cancel: Repeat the setting procedure. Press the [RESET] button for more than three seconds. The unit beeps three times.

The Self-Cleaning operation minimizes the growth of mold and bacteria by running the fan to dry the inside of the air conditioner.

Operation: When the cooling or dry operation shuts down, the unit automatically starts the Self-Cleaning operation. The louver opens slightly, and the indoor fan operates continuously at 500 rpm.

Duration: If the unit ran for 10 minutes or longer in Cooling/Dry mode, the self-cleaning runs for 30 minutes. If it ran for less than 10 minutes, no self-cleaning is performed.

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

This setting separates the use of remote controls for each indoor unit when two air conditioners are installed near each other.

Remote Control B Setup:

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 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. The air conditioner will turn OFF. The Remote Control B is memorized.

Note: To reset to A, repeat the above steps. Remote Control A does not have an “A” display.

To decrease the display lamp brightness or turn it off:

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

In examples d1 and d0, the lamp illuminates for 5 seconds before going off.

The flashing LED on the indoor unit indicates specific conditions:

• OPERATION Flashing (1 Hz): Power failure (when power is ON).
• OPERATION Flashing (5 Hz): Protective circuit operation for indoor P.C. board.
• OPERATION + TIMER Flashing (5 Hz): Protective circuit operation for connecting cable and serial signal system.
• OPERATION Flashing (5 Hz) with other codes: Protective circuit operation for outdoor P.C. board.
• OPERATION + TIMER Flashing (5 Hz) with other codes: Protective circuit operation for others (including compressor).

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

2. Press [TEMP up] or [TEMP down] buttons. If there is no fault with a code, the indoor unit will beep once and the display 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).

5. If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep…). The 2-digit alphanumeric code on the display indicates the error.

6. Press [CLR] button to clear the error history after servicing.

7. Press the On/Off button to release the service mode.

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

2. Open two screw caps and securely remove the 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.

To check the compressor winding resistance:

1. Remove the connector of the compressor.

2. Check winding resistance between phases of the compressor using a tester.

3. Check resistance between outdoor frames using a tester.

Criteria:

– Is not grounded (OK if 20MΩ or more).

– Is not short-circuited between windings (OK if about 3.03Ω for RAS-05BAV-E).

– Winding is not opened.