Carrier 19XL - Manual (Page 162)

system. See the applicable CCN manual for more information on these tables. These tables can
only be defined through a CCN Building Supervisor.
Check Voltage Supply
Access the Status 01 screen and read the actual line voltage. This reading should be equal
to the incoming power to the starter. Use a voltmeter to check incoming power at the starter
power leads. If the readings are not equal, an adjustment can be made to the 24-v input to the
SMM at the potentiometer located in the low-voltage section to equalize the two readings.
Perform an Automated Control Test
Check the safety controls status by performing an automated controls test. Access the
Control Test table and select the Automated Tests function ( Table 8 ).
The Automated Control Test will check all outputs and inputs for function. It will also set the
refrigerant type. The compressor must be in the OFF mode in order to operate the controls test
and the 24-v input to the SMM must be in range (per line voltage percent on Status01 table).
The OFF mode is caused by pressing the STOP pushbutton on the LID. Each test will ask the
operator to confirm that the operation is occurring, and whether or not to continue. If an error
occurs, the operator has the choice to try to address the problem as the test is being done, or to
note the problem and proceed to the next test.
Note: If during the Control Test the guide vanes do not open, check to see that the low pres-
sure alarm is not active. (This will cause the guide vanes to close).