94
RTAA-IOM-3
Figure 52
Menu Formats (Continued)
SERVICE #1 DISPLAY – MENU 1
Selected by setting the number 1 in the “P” menu item. The compressor circuit indicators will not be lit continuously in this
menu to indicate which compressors are running. As the menu is advanced, the appropriate compressor/circuit indicator will
flash.
UCM Based Setpoint
Display Code and Description Defaults Range
P Menu Number
10 Front Panel Chilled Water Setpoint 44 F 0 to 65 F
11 Design Delta Temperature Setpoint 10 F 4 to 30 F
12 Differential to Start Setpoint 2 F 2 to 30 F
13 Front Panel Current Limit Setpoint 120% 40 to 120%
14 Outdoor Air Temperature (Optional)
15 Low Ambient Lockout - d/E (Optional) d
16 Low Ambient Lockout Setpoint - d/E (Optional)* 20 F -20 to 40 F
17 Cond. Entering Water Temperature (Optional) RTAA Non Applicable
18 Cond. Leaving Water Temperature (Optional) RTAA = Non Applicable
19 Service Pumpdown d/E (Stop/Reset only)** d
1A Circuit Lockout d/E** d
1b Circuit Diagnostics Reset** d
*Dashes are displayed for the setpoint when the Low Ambient Lockout (15) is disabled.
**Displayed by Compressor/Circuit
SERVICE #2 DISPLAY - MENU 2
Selected by setting the number 2 in the “P” menu item. Compressor/Circuit indicators shall not be lit continuously in this
menu to indicate which compressors are running. As the menu is advanced, the appropriate compressor/circuit indicator will
flash.
UCM Based Setpoint
Display Code and Description Defaults Range
P Menu Number
20 Compressor Mode*
21 Compressor Suction Refrigerant Temp.*
22 Compressor Evap. Refrigerant Temp.*
23 Evaporator Refrigerant Pressure*
24 Saturated Condenser Refrigerant Temp.*
25 Condenser Refrigerant Pressure*
26 EXV Test - d/E (Only in STOP/RESET)* d
27 Compressor % RLA (Highest leg)*
28 % Line Volts (Optional)
29 Compressor Starts (Optional)*
2A Compressor Hours (Optional)*
2b Compressor Test d/E d
*Displayed by compressor/circuit
Compressor Starts, Compressor Hours and % Line Volts will be displayed as dashes (e.g. “2A when this option is not installed.
After the EXV test has been completed, the “E” will be automatically reset to “d”.
See “Electronic Expansion Valve (EXV) Test”.
The Condenser Refrigerant Pressure and the Evaporator Refrigerant Pressure, displayed on the UCM, are the saturated
condenser and evaporator temperatures converted to R-22 pressure readings. The units are PSIG (Kilopascal gauge) and
referenced to an elevation of sea level or 14.6960 psia (101.3289 KPa absolute).
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