Carrier PC211 Check Voltage Supply, Perform an Automated Control Test

system. See the applicable CCN manual for more information on these tables. These tables can
only be defined through a CC N 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 th e starter. Use a voltmeter to check incoming power at the s t arter
power leads. If the readi ngs are not equal, an adjust ment can be made to the 24-v in put 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 auto mated controls test. Access the
Control Test table and se lec t the Automated Tests func t ion (Table 8).
The Automated Control Test will check all outputs and inputs for function. It wi ll al so set the
refrigerant type. The com pr e ssor must be in the OFF mode in order to ope rate 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 pre ssing the STOP pushbutto n on the LID. Each test will as k the
operator to confirm th at the operation is occurring , and whether or not to cont inu e. If an error
occurs, the operato r has the choice to t ry to address the probl em as the test is being d one, or to
note the problem and pro c eed to the next test.
Note: If during the Control Tes t the guide vanes do not open, ch ec k to see that the low pres-
sure alarm is not active. (This will cause the guide v ane s to close).