Hitachi RAF-35NH5 Service Manual page 320

ROUBLESHOO ING WHEN HE IMER LAMP BLINKS
MODEL RAF-25NH5, RAF- 5NH5, RAF-50NH5
Perform troubleshooting according to the number of times the timer lamp on the display of the indoor unit blinks.
Lamp blinking mode
2 sec
Once
2 sec
2 Times
2 sec
2 sec
8 Times
2 sec
9 Times
2 sec
10 Times
2 sec
1 Times
Lights for 0. 5 sec at
(
interval of 0. 5 sec.
Lamp blinking mode
2 sec
2 Times
2 sec
2 sec
4 Times
2 sec
5 Times
2 sec
6 Times
2 sec
7 Times
2 sec
8 Times
2 sec
9 Times
2 sec
12 Times
2 sec
1 Times
2 sec
14 Times
2 sec
15 Times
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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.
Main defective
Reversing valve defective
Forced operation of outdoor unit
Indoor/Outdoor interface defective
Times
Damper defective
Indoor sensor defective
Abnormal rotating numbers
of DC fan motor
IC401 defective
)
Main defective
Peak current cut
Abnormal low speed rotation
Times
Switching failure
Overload lower limit cut
OH thermistor temp. rise
Outdoor thermistor abnormal
Acceleration defective
Comunications error
Fan lock error
Defective EEPROM of outdoor unit
Defective active converter
Discharge error
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