Carrier 17/19EX - Manual (Page 309)

* 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.
† On open-drive machines, differential pressure is the only oil pressure displayed.
** Displayed only on hermetic machines.
7. Discrete Outputs
8. Pumpdown/Lockout
9. Terminate Lockout
All outputs or individual outputs may be energized:
Hot gas bypass relay
Oil heater relay
Motor cooling relay**
Tower fan relay
Alarm relay
Shunt trip 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
Table 7 — Control Test Menu Functions (Continued)
Tests To Be Performed Devices Tested