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Hitachi RAK-18NH5 - Timer Lamp Blinking Troubleshooting; Timer Lamp Blinking Codes and Causes

Hitachi RAK-18NH5
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3Times
5Times
2 sec
2 sec
6Times
2 sec
7Times
2 sec
8Times
2 sec
9Times
2 sec
12 Times
2 sec
13 Times
2 sec
14 Times
2 sec
15 Times
2 sec
2Times
4Times
2 sec
2 sec
Peak current cut
Abnormal low speed rotation
Switching failure
Overload lower limit cut
OH thermistor temp. rise
Acceleration defective
Comunications error
Fan lock error
Defective active converter
Discharge error
Outdoor thermistor abnormal
Defective EEPROM of outdoor unit
Lamp blinking mode Main defective
Once
2 sec
Damper defective
2Times
3Times
8Times
9Times
10 Times
13 Times
2 sec
2 sec
2 sec
2 sec
2 sec
2 sec
IC401 defective
Forced operation of outdoor unit
Indoor/Outdoor interface defective
Lamp blinking mode Main defective
Indoor sensor defective
Abnormal rotating numbers
of DC fan motor
Reversing valve defective
)
Lights for 0.35 sec at
(
interval of 0.35 sec.
     
MODEL RAF-25NH5, RAF-35NH5, RAF-50NH5
Perform troubleshooting according to the number of times the timer lamp on the display of the indoor unit blinks.
< Cautions >
(1) If the interface circuit is faulty when power is supplied, self-diagnosis will not be displayed.
(2) If the indoor unit does not operate at all, check to see if the connecting cord is reversely connected or
disconnected.
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