1
(c)Check method when the error code is display
Remote controller or Indication board: Inspection LED, error code
Indoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display)
Outdoor unit PCB: ARed LED (inspection display), Green LED (CPU. normal display)
Error display : No display | [Power supply line error] | |
LCD display : No display | ||
| ||
|
|
| Indoor unit | Outdoor unit | ||
|
|
|
|
|
Red LED |
| Stays OFF | Red LED | Stays OFF |
|
|
|
|
|
Green LED |
| Stays OFF | Green LED | Stays OFF |
|
|
|
|
|
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Start
Is the voltage | NO |
| Voltage between | YES | ||||
between 1 and 2/N of the indoor |
| 1 and 2/N of the outdoor unit’s | ||||||
unit’s terminal block |
|
| terminal block is |
|
| |||
AC220/240V? |
|
| AC220/240V. |
|
| |||
| YES |
|
|
| NO |
|
| |
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
| Outdoor unit check |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Fuse | NO | Disconnect the transformer’s primary side |
|
| ||||
(CNW1) and measure the resistance on |
|
| ||||||
OK? |
|
|
| |||||
| both ends of CNW1 (using a tester, etc.). |
|
| |||||
|
|
|
|
| ||||
| YES | Notes (1) | In models other than FDT, replace the fuse. |
|
| |||
|
| (2) FDT only |
|
| ||||
Control lines connected wrong or disconnected.
Several 10K Ω or higher. | NO | Replacement indoor unit | |
| power supply PCB | ||
|
|
| |
| YES |
| |
|
| ||
|
| ||
|
| ||
Fuse exchange
Is the voltage at | NO |
|
| ||
CNW3 or 10(1) (red – red) on the | Transformer exchange |
| |||
transformer’s secondary side |
|
|
| ||
|
|
|
| ||
14 V or higher? |
|
|
|
| |
Note (1) In models other than FDT, it is CNW2. | |||||
| |||||
YES
(1)(2) |
| |
Is the voltage | NO | |
between CNW5 2 and 3 |
| |
|
| |
DC 12V? |
| |
Replacement indoor unit power supply PCB
YES
Note (1) 3 is GND
(1)(2) |
|
|
| ||||
| Is the voltage | NO |
|
| |||
between CNW8 2 and 3 |
| Harness disconnection |
| ||||
|
| ||||||
| DC 12V? |
|
|
| |||
|
|
| |||||
|
|
| |||||
|
| YES |
|
|
| ||
|
|
|
|
| |||
|
|
|
|
|
|
|
|
| Does it return | YES |
|
| |||
| Unit is normal. | ||||||
to normal when the power |
| ||||||
|
| (Malfunction was due to noise, etc.) | |||||
| supply is reset? |
| |||||
|
|
|
| ||||
|
| NO |
|
|
| ||
|
|
|
|
| |||
|
|
|
|
|
|
|
|
| Replacement indoor unit |
|
|
|
|
| |
| control PCB |
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 12 -
