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7-7-8. Abnormal Outdoor Unit Discrimination Method By Fan Operating Function
This function is provided to forcedly operate the fan of the outdoor unit in which an error occurred or the fan of
thevnormal outdoor unit by the switch operation on the interface P.C. board in the header unit.
To specify which one of the follower units connected to the system was faulty, use this function for the system
stop due to a follower unit fault (Check code [E28]).
[Operation]
<In case to operate the fan in the erroneous outdoor unit only>
(1) Check that the switches SW01/SW02/SW03 on the interface P.C. board in the header unit are set to [1/1/1].
[A] [B]
7-segment display
Outdoor unit No. Error code display
(2) Push the push switch SW04 for 2 seconds or more.
(3) [E 1] is displayed on 7-segment display [A].
(4) The fan of the outdoor unit in which error occurred starts operation within approx. 10 seconds after [E 1]
was displayed.
<In case to operate the fans in all the normal outdoor units>
(1) Check that the switches SW01/SW02/SW03 on the interface P.C. board in the header unit are set to [1/1/1].
(2) Push the push switches SW04 and SW05 at the same time for 2 seconds or more.
(3) [E 0] is displayed on 7-segment display [A].
(4) The fans of all the normal outdoor units start operation with the Max. fan speed within approx. 10 seconds
after [E 0] was displayed.
[Release]
Push the push switch SW05 on the interface P.C. board in the header unit for 2 seconds or more.
The outdoor fan which was operated stops.
* Check that [U. 1] is displayed on 7-segment display [A], and then finish the work.
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