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CSRA-SVX02A-EN
System Start-Up
10.Attach a set of service gauges onto the suction and discharge gauge
ports for each circuit. Refer to Figure 23 for the various compressor loca-
tions.
11.Once the configuration for the components is complete, press the NEXT
key until the LCD displays the "Start test in __Sec." screen. Press the +
key to designate the delay before the test is to start. This service test will
begin after the TEST START key is pressed and the delay designated in
this step has elapsed. Press the ENTER key to confirm this choice.
WARNING
Rotating Components!
During installation, testing, servicing and troubleshooting of this product
it may be necessary to check rotating components. Have a qualified or
licensed service individual who has been properly trained in handling
exposed rotating components, perform these tasks. Failure to follow all
safety precautions when exposed to rotating components could result in
death or serious injury.
Make sure all personnel are standing clear of the unit before proceeding.
The programmed components will start when the TEST START time
designated in the previous step has elapsed.
12.Turn the 115 volt control circuit switch 1S1 "On".
13.Press the TEST START key to start the test. Remember that the delay
designated in step 11 must elapse before the system will begin to oper-
ate.
14.Once each compressor or compressor pair has started, verify that the
rotation is correct. If a scroll compressor is rotating backwards, it will not
pump and a loud rattling sound can be observed. Check the electrical
phasing at the load side of the compressor contactor.
If the phasing is correct, before condemning the compressor, interchange
any two leads to check the internal motor phasing. Refer to the illustration
in Figure 24 for the compressor terminal identification. If the compressor
runs backward for an extended period (15 to 30 minutes), the motor wind-
ings can over heat and cause the motor winding thermostats to open.
This will cause a "compressor trip" diagnostic and stop the compressor.
15.Verify that the oil level in each compressor is correct. The oil level may be
down to the bottom of the sightglass but should never be above the sight-
glass.
16.Press the STOP key at the Human Interface Module in the unit control
panel to stop the compressor operation.
17.Repeat steps 8 through 16 for each compressor stage and the appropri-
ate condenser fans.
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