York YU2E18YJ6AMHO-Y, Service Manual, Page: 29 / 124

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Push SW1 to check the unit's status while running. The digital display shows the following codes each
time the SW1 is pushed.
Number
of
Presses
Display Remark
0 Normal display
Displays running frequency, running state, or malfunction code
1 Quantity of indoor units with working connection Actual data
Display Number of indoor unit
1 1
2 2
3 3
4 4
2 Outdoor unit running mode code Off: 0,Fan only: 1, Cooling: 2, Heating: 3, Forced cooling: 4. Forced
defrost:A
3 Indoor unit A capacity
The capacity unit is horse power. If the indoor unit is not connected, the
digital display shows the following: “――”
(9K:1HP,12K:1.2HP,18K:1.5HP)
4 Indoor unit B capacity
5 Indoor unit C capacity
6 Indoor unit D capacity
7 Indoor unit E capacity
8 Indoor unit A capacity demand code
Norm code*HP
(9K: 1HP,12K: 1.2HP,18K: 1.5HP)
9 Indoor unit B capacity demand code
10 Indoor unit C capacity demand code
11 Indoor unit D capacity demand code
12 Indoor unit E capacity demand code