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

When installing or servicing the TOSHIBA RAS-16BAV-E, observe the following safety precautions regarding power supply:

1. The appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least 3 mm.

2. The power supply cord of the outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord.

3. Turn off the main power supply switch (or breaker) before the unit maintenance.

4. Check that the earth wire is not broken or disconnected before service and installation. Failure to do so may cause electric shock.

The TOSHIBA RAS-16BAV-E uses the new HFC refrigerant (R410A) which does not destroy the ozone layer. Important requirements include:

1. R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure is approximately 1.6 times that of refrigerant R22.

2. Be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter the R410A air conditioner circuit.

3. Special tools are required for R410A units. The sizes of connecting sections of the charging port on the main unit and installation tools are different from conventional units to prevent mixing.

4. Use new and clean piping materials with high-pressure fittings made for R410A only.

The tightening torque for flare pipe connections depends on the diameter of the copper pipe used:

Follow these steps to evacuate air from the connecting pipes and indoor 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.

To set the auto restart function so the unit restarts automatically after a power failure:

1. Ensure the power supply to the unit is on.

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

3. The unit will beep three times, indicating the function is set.

Note: This function is not set to work when shipped from the factory.

To cancel the auto restart function:

1. Repeat the setting procedure: Press the [RESET] button on the indoor unit for more than three seconds.

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

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

1. Press the RESET button on the indoor unit. The unit can start or stop without using the remote control.

2. The operation mode is set to AUTOMATIC operation.

3. The preset temperature is set to 25°C.

4. The fan operation is set to automatic speed.

1. Press the [CHECK] button on the remote controller with the tip of a pencil to set the remote controller to service mode. “00” will be 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 will flash continuously (5 times per 1 sec).

4. Check the unit with all 52 check codes (00 to 33). If there is a fault, the indoor unit will beep for 10 seconds.

5. Press [CLEAR] button after service finish to clear the service code in memory (“7F” is indicated).

6. Press the [ON/OFF] button to release the service mode.

Here are common check codes and their meanings:

• 00: Normal.
• 02: Outdoor block, Outdoor fan drive system error (Fan motor lock, winding failure).
• 03: Discharge temperature error, gas leakage.
• 04: Serial signal (Defective wiring, connecting cable, or fuse).
• 14: Inverter circuit over current or short circuit.
• 16: Compressor position-detect circuit error.
• 17: Current-detect circuit of inverter P.C. board error.
• 18: TE or TS sensor abnormal (Outdoor heat exchanger or Suction temp sensor).
• 19: TD sensor abnormal (Discharge pipe temp sensor) or gas shortage.
• 1A: Outdoor fan failure or its drive-circuit on the inverter P.C. board failure.
• 1C: Compressor drive output error.
• 1E: Discharge temperature exceeded 117°C.
• 1F: Compressor high current or installation problem.
• 21: High pressure switch error or outdoor unit air flow blocked.

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 (d3, d2, d1, or d0) is shown on the display.

2. Press [TEMP UP] or [TEMP DOWN] to increase or decrease the brightness in 4 levels:

• d3: 100% brightness.
• d2: 50% brightness.
• d1: 50% brightness and operation lamp is turned off.
• d0: All lamps are turned off.

To separate the remote control for each indoor unit (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 [CHECK] button on the Remote Control by the tip of a pencil. “00” will be shown on the display.

4. Press [MODE] while pushing [CHECK]. “B” will show on the display and “00” will disappear. The air conditioner will turn OFF.

5. The Remote Control B is now memorized.

The Self-Cleaning operation starts automatically when the unit is performing cooling or dry operation and is then turned off:

1. Press the “STOP” button on the remote control.

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

3. The fan will run for a specific period to dry the inside of the unit, then stop automatically.

Note: If the cooling/dry operation was less than 10 minutes, no self-cleaning is performed. If more than 10 minutes, it operates for 20 minutes.

1. Remove the screws (ST2TØ4 x 10L, 5 pieces) securing the upper cabinet.

2. After removing the screws, remove the upper cabinet by pulling it upward.

1. Perform the removal of the upper cabinet first.

2. Remove the fixing screws (ST2TØ4 x 10L, 2 pieces) used to secure the front cabinet and inverter cover.

3. Remove the screws (ST2TØ4 x 10L, 4 pieces) used to secure the front cabinet at the bottom.

4. Remove the fixing screws (ST2TØ4 x 10L, 2 pieces) used to secure the motor base.

5. The front cabinet is fitted into the side cabinet (left) at the front left side, so pull up the top of the front cabinet to remove it.

1. Remove the upper part of the front cabinet.

2. Remove the screw (ST2TØ4 x 10L, 2 pieces) of the upper part of the front cabinet.

3. Disconnect all connectors on the P.C. board.

4. Remove the screw (ST2TØ4 x 10L, 4 pieces) fixing the terminal part of the inverter box to the main body.

5. Remove the front cabinet and remove the fixing screws (ST2TØ4 x 10L) for securing the main body and inverter box.

6. Disconnect connectors of various lead wires.

7. Remove various lead wires from the holder at the upper part of the inverter box.

8. Pull the inverter box upward.

Warning: Be careful to check the inverter because a high-voltage circuit is incorporated. Discharge the electrolytic capacitor before handling.

1. Turn OFF the breaker.

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

3. Check if the fan rotates without trouble when rotating it with hands. If no (mechanical lock), replace the fan motor.

4. Measure the resistance value between the leads of the connector (CN31):

• (1) Red lead – (2) White lead
• (2) White lead – (3) Black lead
• (3) Black lead – (1) Red lead

5. If the resistance is 16 to 51Ω, it is normal. If not, the fan motor is defective.