(3) Check procedures
Table
No. | Procedure |
| Check points |
| Causes |
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1 | Turn off the power supply breaker | Check whether or not the fuse | Impulse voltage was applied or the | ||
| and remove the P.C. board | (F01) is blown. | indoor fan motor | ||
| assembly from electronic parts |
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| base. Remove the connecting |
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| cables from the terminal block. |
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2 | Remove the connector of the | Check power supply voltage : | 1. | The terminal block or the crossover | |
| motor and turn on the power | 1. | Between No. 1 and No. 3 of CN23 |
| cable is connected wrongly. |
| supply breaker. If OPERATION |
| (AC | 2. | The capacitor (C01), line filter |
| indicator flashes (once per | 2. | Between + and – of C03 |
| (L01), resistor (R05), or the diode |
| second), it is not necessary to |
| (DC |
| (DB01) is defective. |
| check steps (1 to 3) in the right | 3. | Between – of C10 and output | 3. | IC01, IC08 and T01 are defective. |
| next column. | ||||
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| side of IC08 (DC 15V) | 4. | IC01, IC08 and T01 are defective. | |
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| 4. | Between 12V and GND | 5. | IC01, IC08, IC07 and T01 are |
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| 5. | Between 5V and GND |
| defective. |
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3 | Push [START/STOP] button once | Check power supply voltage : | IC03 and IC04 are defective. | ||
| to start the unit. (Do not set the | 1. | Between CN21 and |
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| mode to |
| No. 1 of CN23 (DC |
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4 | Shorten the restart delay timer | Check whether or not all indicators | The indicators are defective or the | ||
| and start unit. | (OPERATION, TIMER, FILTER, | housing assembly (CN13) is defective. | ||
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| Plasma) are lit for 3 seconds and |
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| they return to normal 3 seconds |
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| later. |
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5 | Push [START/STOP] button once | 1. | Check whether or not the | 1. | The temperature of the indoor heat |
| to start the unit, |
| compressor operates. |
| exchanger is extremely low. |
| • Shorten the restart delay timer. | 2. | Check whether or not the | 2. | The connection of the heat ex- |
| • Set the operation mode to |
| OPERATION indicator flashes. |
| changer sensor is loose. |
| COOL. |
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| (The connector is disconnected.) |
| • Set the fan speed level to |
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| (CN01) |
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| 3. | The heat exchanger sensor and the | |
| AUTO. |
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| • Set the preset temperature |
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| P.C. board are defective. |
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| (Refer to Table | |
| much lower than the room |
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| 4. | The main P.C. board is defective. | |
| temperature. (The unit (com- |
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| pressor) operates continuously |
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| in the above condition.) |
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6 | If the above condition (No. 5) still | 1. | Check whether or not the | 1. | The temperature of the indoor heat |
| continues, start the unit in the |
| compressor operates. |
| exchanger is extremely high. |
| following condition. | 2. | Check whether or not the | 2. | The connection of the heat ex- |
| • Set the operation mode to |
| OPERATION indicator flashes. |
| changer sensor |
| HEAT. |
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| (CN01) |
| • Set the preset temperature |
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| 3. | The heat exchanger sensor and the |
| much higher than room |
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| P.C. board are defective. |
| temperature. |
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| (Refer to Table |
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| 4. | The main P.C. board is defective |
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7 | Connect the motor connector to | 1. | Check it is impossible to detect | 1. | The indoor fan motor is defective. |
| the motor and turn on the power |
| the voltage (DC 15V) between 3 |
| (Protected operation of P.C. board.) |
| supply. |
| and 4 of the motor terminals. | 2. | The P.C. board is defective. |
| Start the unit the following | 2. | The motor does not operate or | 3. | The connection of the motor |
| condition. |
| the fan motor does not rotate |
| connector is loose. |
| • Set the fan speed level to |
| with high speed. |
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| HIGH. (The unit (compressor) |
| (But it is possible to receive the |
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| operates continuously in the |
| signal from the remote controller.) |
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| above condition in No. 5.) | 3. | The motor rotates but vibrates |
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| strongly. |
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