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 a check code occurred or the
fan of the normal 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 had problem, use this function for the
system stop due to a follower unit problem (Check code [E28]).
[Operation]
<In case to operate the fan in the failed 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].
(2) Press 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 problem 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) Press 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]
Press 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.
Normal state
7-segment display
[ A ] [ B ]
Outdoor unit No.
Abnormal state
Outdoor unit No. " E r r " appears Check code Sub code
Display
alternately
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