Carrier 19XL User Manual
Page 281
* During any of the tests that are not automated, an out-of-range reading will have an asterisk (*) next to
the reading and a message will be displayed.
7. Discrete Outputs
8. Pumpdown/Lockout
9. Terminate Lockout
10. Refrigerant Type
All outputs or individual outputs may be energized:
Hot gas bypass relay
Oil heater relay
Motor cooling relay
Tower fan relay
Alarm relay
When using pumpdown/lockout, observe freeze up precau-
tions when removing charge:
Instructs operator as to which valves to close and when
Starts chilled water and condenser water pumps and con-
firms flows
Monitors —
Evaporator pressure
Condenser pressure
Evaporator temperature during pumpout procedures
Turns pumps off after pumpdown
Locks out compressor
Starts pumps and monitors flows
Instructs operator as to which values to open and when
Monitors —
Evaporator pressure
Condenser pressure
Evaporator temperature during charging process
Terminates compressor lockout
Sets refrigerant type used:
HCFC-22 or HFC-134a.
NOTE: Be sure to ATTACH TO LOCAL DEVICE after
changing refrigerant type. See
Table 8 — Control Test Menu Functions (Continued)
Tests To Be Performed
Devices Tested