Oil Level Judgment Display; Judgment Result Of Oil Level - Toshiba Super MMU-AP0091H Service Manual

12. OIL LEVEL JUDGMENT DISPLAY

The judgment result of the current oil level of the compressor can be confirmed by the switch setup on the
interface P .C. board of the outdoor unit.
Confirm the result in the following procedure.
1. Operation procedure
1) Start the operation.
2) Set up the switches on the interface P .C. board of the outdoor unit of which judgment result of oil level is
to be confirmed as shown below.
SW01/SW02/SW03 = 1/16/1
3) The judgment result of the oil level is displayed on 7-segment display.
7-segment display [oL] [A00]
The right 3 digits indicate the judgment result. The judgment results of the oil level in compressor 1 and
compressor 2 are displayed.
(Example: A ¡ o = ¡ : Oil level result of compressor 1, o : Oil level result of compressor 2
Display example
7-segment display
For the contents of judgment result, refer to the following table.)

Judgment result of oil level

7-segment display
0
1
2
A
B
C
D
4) After confirmation, return SW01/SW02/SW03 to (1/1/1).
Interface P.C. board of the outdoor unit
which displays oil level judgment
[oL] [A00] : Oil level is appropriate in compressor 1 and 2.
[oL] [A01] : Oil level is appropriate in compressor 1, and shortage in compressor 2
[oL] [A20] : Oil shortage in compressor 1, and appropriate in compressor 2
Judgment result in compressor 2
Judgment result in compressor 1
Judgment result
Appropriate Oil level inside of the compressor is appropriate.
Shortage of oil level in the compressor (Both A1 and A2 indicate shortage.)
Shortage
If this judgment continues, the system stops for protection.
TK1 circuit error is considered.
TK1 circuit error
If this judgment continues, the system stops for protection.
TK2 circuit error is considered.
TK2 circuit error
If this judgment continues, the system stops for protection.
TK3 circuit error is considered.
TK3 circuit error
If this judgment continues, the system stops for protection.
TK4 circuit error is considered.
TK4 circuit error
If this judgment continues, the system stops for protection.
Contents
1
Operation starts.
3
Result of oil level
judgment is displayed.
2
Set SW01/SW02/SW03
to 1/16/1.
233
4
After confirmation, return
SW01/SW02/SW03 to 1/1/1.