Hitachi RAF-25RPA Service Manual page 81

TROUBLE SHOOTING WHEN THE TIMER LAMP BLINKS
MODEL RAF-25RPA, RAF-35RPA
When the timer lamp on the display section of the indoor unit blinks, refer to the following table.
Lamp blinking mode
2 sec.
2 sec.
2 sec.
2 sec.
2 sec.
2 sec.
2 sec.
2 sec.
(
Lights for 0.35 sec. at
interval of 0.35 sec.
〈Cautions〉
(1) If the interface circuit is faulty when power is supplied, the self-diagnosis display will not be displayed.
(2) If the indoor unit does not operate at all, check if the connecting cable is connected to the outdoor unit.
ONCE Reversing valve defective
2 Times
Forced operation of outdoor unit
3 Times Indoor/Outdoor interface defective
4 Times Outdoor defective indication
9 Times
Indoor sensor defective
10 Times Abnormal rotating numbers of DC fan motor
12 Times Interface voltage error
13 Times IC401 defective
)
Main defective
81