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

The specifications for the TOSHIBA RAS-05BKV-E Indoor Unit and RAS-05BAV-E Outdoor Unit are as follows:

The TOSHIBA RAS-05BKV-E adopts the new HFC refrigerant (R410A) which does not destroy the ozone layer. The working pressure of R410A is approximately 1.6 times that of refrigerant R22. Because of this, the following precautions must be observed:

Installation:

• Ensure that water, dust, former refrigerant, or refrigeration machine oil does not enter the R410A circuit.
• The sizes of connecting sections of the charging port and installation tools are different from conventional units to prevent mixing.
• Special tools are required for R410A units.
• Use new and clean piping materials with high-pressure fittings made for R410A only.
• Do not use existing piping due to potential impurities and pressure fitting issues.

Piping Materials:

• Use seamless copper pipes made of copper or copper alloy.
• Ensure the amount of residual oil is less than 40 mg/10 m.
• Do not use pipes with collapsed, deformed, or discolored portions.
• Thicknesses of copper pipes must be at least 0.8mm. Never use copper pipes thinner than 0.8 mm.

Tools exclusive for R410A are required to prevent mixing of refrigerants and to handle the higher pressure. The following tools are specified:

When connecting the refrigerant piping, use the following tightening torques for R410A flare connections:

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).
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.

Note: Be sure to use a vacuum pump with a counter-flow prevention function.

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.
• This operation is performed for a specified period based on the duration of the prior operation.
• During Self-Cleaning, the louver opens slightly, and the indoor fan operates continuously at a speed of 500 rpm.

Operation Times:

• If prior operation was up to 10 minutes: No Self-Cleaning operation is performed.
• If prior operation was 10 minutes or longer: Self-Cleaning operates for 30 minutes.

To stop an ongoing Self-Cleaning operation, press the start/stop button on the remote controller twice.

To set or cancel the Self-Cleaning function:

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 once to turn it on (The LED display will show green).
4. Point the remote controller at the LED display on the air conditioner and press the up button at TEMP one time to send code “07”. This must be done within 3 seconds after pressing the [RESET] button.
5. The air conditioner will shutdown automatically.

The LED display will flash to indicate the current status:

• ON (Function Set): Operation LED flashes 1 Hz, Timer LED does not flash.
• OFF (Function Canceled): Operation LED flashes 1 Hz, Timer LED flashes 1 Hz.

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

The Auto Restart Function allows the unit to restart with the set operating conditions after a power failure. It is not set by default.

To Set the Function:

1. Ensure the power supply to the unit is on.
2. Press the [RESET] button located in the center of the front panel continuously for three seconds (less than 10 seconds).
3. The unit receives the signal and beeps three times.
4. The unit will now restart automatically 3 minutes after power is restored.

Note: If the unit is on standby, the green indicator is on for approx. 3 seconds, beeps 3 times, then the green indicator flashes for 5 seconds. If the unit is operating, the green indicator is on, turns off for approx. 3 seconds, beeps 3 times, then flashes for 5 seconds.

To cancel the Auto Restart Function:

1. Repeat the setting procedure: Press the [RESET] button for more than three seconds (less than 10 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:

1. Press and hold the FAN button for 3 seconds until the brightness level (d0, d1, d2, or d3) is shown on the remote controller display.
2. Press the TEMP up or down buttons to rise or decrease the brightness in 4 levels:
   • d3: 100% Brightness (Full)
   • d2: 50% Brightness
   • d1: 50% Brightness and the operation lamp is turned off.
   • d0: All lamps are turned off.

If lamps on the indoor unit are flashing, you can execute self-diagnosis using the remote controller:

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 the [TEMP up] or [TEMP down] button.
   • If there is no fault with a code, the indoor unit will beep once, and the display on the remote will change.
   • The TIMER indicator of the indoor unit will flash continuously (5 times per 1 sec).
3. Check the unit with all 52 check codes (00 to 33) by scrolling through them.
4. If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep…).
5. Note the check code displayed on the remote controller.
6. 2-digits alphanumeric will be indicated on the display, and all indicators on the indoor unit will flash (5 times per 1 sec).
7. To clear the service code from memory after finishing service, press the [CLEAR] button. “7F” is indicated.
8. Press the [ON/OFF] button to release the service mode.

The following check codes indicate specific operational faults:

To remove the air inlet grille:

1. Stop the operation of the air conditioner and turn off the main power supply.
2. Open the air inlet grille and push it up until the air inlet grille takes off.
3. Remark: If there is not enough space to push the grille up until it takes off, you can push the arms of the air inlet grille toward the outside and remove it.

To remove the front panel:

1. Stop operation and turn off the power supply.
2. Open the two screw caps at the front panel and securely remove the 2 screws.
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.

If the power is not turned on and the unit does not operate entirely:

1. Check if the supply voltage is normal.
2. Check if the normal voltage is provided to the outdoor unit.
3. Check if the crossover cable is connected properly.
4. Check if the fuse (F01) on the indoor control board is blown.
5. If the OPERATION lamp is blinking, check if the transmission mark on the remote control flashes. If not, the remote control batteries or the remote itself may be defective.
6. If the fuse is blown, parts like the varistor (DB01), capacitor (C08), transformer (T01), or IC01 may be defective.
7. If the voltage (DC 12V or 5V) on the rear of the indoor control board is not normal, the microcomputer is likely defective and the main P.C. board needs replacement.