8-7. Oil Level Judgment Display
The current compressor oil level judgment results can be accessed by setting the switches provided on the
interface P.C. board of an outdoor unit.
Perform the checks in accordance with the procedure described below.
1 Operation Procedure
(1) Start the operation.
(2) Set the switches provided on the interface P.C. board of the outdoor unit for which oil level judgment results
are required as follows: SW01/SW02/SW03 = 1/16/1
(3) The oil level judgment result will be displayed on the 7-segment display. 7-segment display: [oL] [# * ...]
The letters #, and * are digits that represent judgment results for compressor Nos. 1 and 2, respectively.
(See the table below for the interpretation of the judgment results.)
(4) When checking is completed, revert the SW01/SW02/SW03 setting to [1/1/1].
2 Oil Level Judgment Results
Display example
Displayed digit DescriptionJudgment result
0 Normal The amount of oil in the compressor is sufficient.
1
2
Low level
The amount of oil in the compressor is insufficient. (Both “1” and “2” stand for insufficiency.)
If this result persists, the system will turn itself off in a protective shutdown.
7-segment display [ oL ]
[ oL ]
[ oL ]
Oil level is normal for compressors 1 and 2.
Oil level is low for compressors 1 and 2.
Oil level is low for compressor 2 and normal for compressors 1.
Judgment result for compressor 2
Judgment result for compressor 1
[ 0 0 ... ]
[ 2 2 ... ]
[ 0 2 ... ]
Interface P.C. board
Interface P.C. board of outdoor unit for
which oil level judgment results are
%0%0%0%0%0
%0
10
10
10
10
10
10
+%
+%
59 59 59
2
10
0%0%0%
(
(
%0
%0
%0 %0
%0 %0
%0%0 %0
%0%0
59
59
59
59
59
59
59
%0
..
%0
%0
%0
%0
59 59 59
%0
%0
7 7 7 7
7X 7J7X 7J 7E 7E
5*+'.&5*+'.&
5*+'.&
7 7
5*+'.&
SW04
SW01
1
Start operation.
SW02 SW03
SW05 SW06
4
Upon completion of checking, revert
SW01/SW02/SW03 setting to 1/1/1.
3
Oil level judgment
results are displayed
2
Set SW01/SW02/SW03 to
1/16/1.
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