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2.4 Diagnostics of a compressor in automatic mode
Press “Automatic test” (Fig.4, n.2) to enter the automatic test mode. Valves 1 and 5 must be in
closed position. The window of automatic test mode (Fig.5) will appear.
Press “Start” (Fig.5, n.5) to launch the automatic testing. The Test Bench will perform the following
tests:
-
Vacuum tightness test
. It may take from one to three operational cycles to complete the test
procedure. Every cycle is divided into two stages: air pumping and hold time. During the hold time
the compressor tightness will be assessed. Upon completion, the following message will be
displayed in the information field (Fig.6, n.3): “Ok” - positive test result, “Failed” – negative test
result.
-
Valves and/or clutches
. Upon the test completion, the test result will be displayed in the
appropriate line: “Ok” - positive test result, “Failed” – negative test result or some element is
missing.
-
Compressor productivity
. The Test Bench performs diagnostics in two stages at high and low
speeds under different heat loads on the evaporator. The test results are displayed in the
information field: “Ok” - positive test result, “Failed” – negative test result..
-
Noise test
. The Test Bench will gradually increase the speed on the compressor pulley. The
operator must detect the abnormal noise coming from the compressor. If there is any, press
“Ok”
, if no noise is detected, press “No”
.
The test procedure can be stopped at any time by pressing button “Stop”. To restart the
procedure, press “Start”. The procedure will be launched again from the beginning.
During the procedure, the information messages instructing on the positions of the LP and HP
valves will be displayed on the screen. The valves should be turned on/off smoothly to avoid a
hydraulic shock.
Operation manual - test bench MS111
English