Hitachi RAS-18SX8 Manuel De Maintenance page 227
14. Timer lamp blinking: blinking 12 times
[Situation] The timer blinks 12 times and the product will not run.
[Estimated failure locations] ・Erroneous connection in the indoor-outdoor connection line (F cable)
[Cautions] ・When lines A and B of F cable are erroneously connected (crossed), the product may not
・Detecting this failure mode turns off the power relay 3 minutes later and blocks the power
[Diagnosis flow]
Initiating troubleshooting
Is the F cable connection free from errors?
Is the CN30 securely inserted into
the outdoor board?
Press the START/STOP button on the remote control
unit and start the product.
Are terminals A and B of the terminal board of the
electrical installation of the outdoor unit subjected to
220-230 V AC?
※ Take measurements within 3 minutes after remote
control operation.
Are terminals A and B of the terminal board of the electrical
installation of the indoor unit subjected to 220-230V AC?
※ Take measurements within 3 minutes after remote control
operation.
Replace the "indoor electrical installation."
15. Timer lamp blinking: blinking 13 times
[Situation]
[Estimated failure location] ・EEPROM, microcomputer
[Diagnosis flow]
Replace the "indoor electrical installation."
Downloaded from
www.Manualslib.com
・Wire break or poor insertion of the indoor-outdoor connection line (F cable)
・Electrical installation in the outdoor unit
・Communication error due to noise in other home electronics
※This does not constitute a failure in the air-conditioner.
enter self-diagnosis display mode. If the self-diagnosis memory stores data about "timer
lamp blinked 12 times," then, just in case, check if the F cable is not erroneously connected.
supply to the outdoor unit.
Yes
Yes
No
No
The timer lamp blinks 13 times and the product will not run.
manuals search engine
No
Correct the F cable connection.
No
Correct the connector.
Yes
Check the electrical installation
of the outdoor unit.
Yes
Double-check the F cable for erroneous connection,
wire break, and poor insertion and correct the
nonconforming parts.
– 260 –
