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Testing Process (continued):
Once all indoor units have been checked, the digital display will show either "EC" or "0"
9.
•
"EC" indicates there is an error in the wires to the indoor unit(s).
•
The LED(s) will be flashing, indicating which circuit(s) has the fault.
•
For example, if the wires for circuit A and B are switched, then LED1 and
LED 2 will flash.
•
Once the wiring is corrected, re-run this test to confirm everything is functional.
"0" indicates that all wiring is correct.
o
If all the wiring is correct, the LED's remain solid.
o
10. Once the test is complete, make sure to change the dip switches back to the OFF
position. And set each indoor unit to preferred set points.
Service Bulletin
3
JUNE 2019
DFS05-19
DFS05-19
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