INVENTOR V1RFI-30, Service Manual

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10. Door malfunction -------FC is displayed on indoor unit
Checking method: The COM with silk print CN321 is for test of connection of door. When each COM is normal, the
voltage is that if the door is completely closed: UP is 0V and DOWN IS 5V; if the door is in the middle: UP is 5V
and DOWN is 5V; if the door is open: UP is 5V and DOWN is 0V. If malfunction occurs, pull out the line connecting
with this COM and then re-insert it (may be poor contact for loosening). If it still can’t be eliminated, test the
voltage of terminal .If it is different from the above value, the photoelectric switch is damaged, which should be
replaced.
11. Indoor ambient temperature sensor open-circuited or short-circuited------ F1
Indoor evaporator temperature sensor open-circuited or short-circuited------- F2
Checking method: The COM with silk print CN361 is for indoor tube temperature and indoor ambient temperature.
If malfunction occurs, pull out the line connecting with this COM and then re-insert it. . If it still can’t be eliminated
replace the temperature sensor.
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