Hitachi RAC-70WPA - Page 78

– 89 –
<Reference>
When the thermistor is open, open condition or disconnect, microcomputer pin 65~67 are approx. 0V; When
thermistor is shorted, they are approx. 5V and LD301 will blink as below table:-
Table 4-2
Thermistor
Thermistor
Condition
OH Thermistor
6 Times BlinkingShort
7 Times BlinkingOpen
7 Times Blinking
7 Times Blinking
7 Times Blinking
7 Times Blinking
Outdoor Thermistor Defrost Thermistor
LD 301 Blinking