Ingersoll-Rand 900829, Руководство по обслуживанию

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Compressor Maintenance
61
5. Check to make sure the compressor clutch has
a good ground. Paint on the mounting brackets
can impede a good ground connection.
6. Let the unit sit for 1/2 hour after charging to
let the charge go through the system.
7. Check to make sure all the fans running with
the correct rotation.
8. Check to make sure all the check valves
holding.
9. Check to make sure all the coils are clean.
IMPORTANT: Three point evacuation is a must
on units with standby option.
The following six steps are used to identify if a
compressor has actually failed and should be
removed. If the compressor fails to meet any one
of these 6 steps it should be replaced with a new
compressor/clutch or clutch. (Note: Failing a step
does not assign warranty responsibility.)
1. Compressor Rotation Test
Internal compressor failures can be quickly
identified by performing a shaft rotation test.
Normal rotation of the compressor shaft should be
smooth without catching or binding. Binding or
hang felt during the shaft rotation test have an
internal part failure. This compressor should be
removed and replaced with a new unit.
Figure 40: Compressor Rotation Test
2. Voltage Test
Confirm that the clutch is receiving at a minimum
11.5 V or 23 V for 12 V and 24 V systems
respectively. If voltage is not being received at the
clutch run a diagnostic on the vehicle electrical
system. (Note: Perform test with power applied to
coil to fully load the circuit.)
Figure 41: Voltage Test
NOTE: Also make sure that the compressor body
has good continuity to ground to ensure the
clutch is energized when it receives voltage.
Later units have a ground wire attached to the
compressor to ensure good continuity to ground.
Units installed before the compressor ground
wire was included in the installation kit should
have a compressor ground wire (P/N 42-1599)
installed if they exhibit intermittent clutch
operation.
Figure 42: Typical Compressor
Ground Wire Installation