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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, 2 and 3, 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 Judgment result
Description
O
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.
1
Start operation.
3
2
4
Interface P.C. board of outdoor unit for
which oil level judgment results are
Oil level judgment
results are displayed
Set SW01/SW02/SW03 to
1/16/1.
Upon completion of checking, revert
SW01/SW02/SW03 setting to 1/1/1.
7-segment display
[ oL ]
[ oL ]
[ oL ]
Oil level is normal for compressors 1, 2 and 3.
Oil level is low for compressors 1, 2 and 3.
Oil level is low for compressor 2 and normal for compressors 1 and 3.
Judgment result for compressor 3
Judgment result for compressor 2
Judgment result for compressor 1
[ 0 0 0 ]
[ 2 2 2 ]
[ 0 2 0 ]
