Accessing P1 thru P5 Menus on RTAA controls
There are six menus on the RTAA 140-400 ton Controller
- Four (P0 thru P3) of which are shown on the operator interface panel
- Two factory displays (P4 and P5) which require a combination of key strokes to access
- All menus are accessible whether the unit is a "Running" or "Stopped" mode
Menus
There are six menus, four of which are shown on the operator interface panel and two factory displays, which are described later in this section. The menus are numbered as follows:
- Operating Display - Menu 0
- Service #1 Display - Menu 1
- Service #2 Display - Menu 2
- Auxiliary Options Display - Menu 3
- Factory Display - Menu 4
- Factory Display - Menu 5
Each menu can be considered to be a page of data, formatted as shown in Figure 52. The operator can view in line of the menu at a time (menu item) on the digital display and can scroll through the menu by using the Display Up and Display Down keys. For example, when the digital display shows “P 0”, the UCM is in the “Operating Display” menu. By depressing the Display Down key one time, the next line of the menu, “Operating Code”, will be shown as an “A”, along with the current unit operating status. All operating and diagnostic codes are described on the “Condition Codes” label, as shown in Figure 53.
There are a few exceptions to the scrolling function. When a menu selection represents multiple pieces of information:
“C” Menu Item - Other Diagnostic Codes”: When this menu item is selected, depressing the Display Down key will display diagnostic history in code number sequence. Use the Display Up key to return to the top of the list. While in the “C” menu item, flashing indicates that the information is currently “true”, whereas steady, or non-flashing indicates historic data only. The digital display will not advance to the next item (d) until all diagnostics have been displayed. If there are no diagnostics to display, the data field will be blank for one key stroke.
Compressor/Circuit Parameters: Because the unit has two, three or four compressors and two refrigerant circuits, items that refer to compressors or circuits will remain selected until information for all have been displayed. For example, assume a “29” Compressor Starts, menu selection on a two compressor unit. The menu number “29” will be displayed and the indicator over the “A” compressor will be flashing. By depressing the Display Down key one time, the “29” will remain but the indicator light over the “B” compressor will be flashing. Another Display Down keystroke will display menu “2A”, Compressor Hours, with compressor “A” indicator flashing. If either the Display Up or Display down keys are held down, the scrolling will continue until the key is released, or until reaching the top or bottom of the menu. In this case, the display will return to the “P” menu position and stop.
To change menus, scroll to the “P” menu position and use the Set Point Up or Set Point Down keys. For example, assume that the display shows “P 0” and it is desired to view the Auxiliary Options on Menu 3. Depress the Set Point Up key three times and the “P 3” menu will be displayed. To return to Menu 0, depress the Set Point Down key three times or Set Point Up key once (to wrap around) and “P 0” will be displayed. This procedure will work for menus 0 through 3.
A combination of key strokes is required to access menus 4 and 5. With the display in the “P” menu position (P), use the Set Point Up and Down keys to display “0, 1, 2, 3, 2, 3, 4”. Once in the “P 4” menu, use the Set Point Up key to access menu 5.
All menus are always accessible, whether the unit is in a “running” or “stopped” mode.
Menu Formats
Operating Display - Menu 0
Operating Display - Menu 0
Selected by setting the number 0 in the “P” menu item. Compressor/circuit indicators will be lit continuously in this menu to indicate which compressors/circuits are running. All items of Menu 0 are display only. Setpoint changes must be made in other menus.
Display Code and Description
- P — Menu Number
- A — Operating Code
- b — Last Diagnostic Code
- C — Other Diagnostic Codes
- d — Active Chilled Water Setpoint¹
- E — Evaporator Entering Water Temperature
- F — Evaporator Leaving Water Temperature
- L — Active Current Limit Setpoint
¹ Dashes are displayed for the setpoint when the chiller is either in the “Ice Building” or “Ice Building Complete” mode.
Service #1 Display - Menu 1
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.
| Display Code | Description | UCM Based Defaults | Setpoint 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)¹ | 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)² | d | |
1A | Circuit Lockout d/E** | d | |
1b | Circuit Diagnostics Reset** | d | |
¹ Dashes are displayed for the setpoint when the Low Ambient Lockout (15) is disabled. ² Displayed by Compressor/Circuit | |||
Service #2 Display - Menu 2
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.
| Display Code | Description | UCM Based Defaults | Setpoint Range |
|---|---|---|---|
P | Menu Number | ||
20 | Compressor Mode¹ | ||
21 | Compressor Suction Refrigerant Temp.¹ | ||
22 | Compressor Evap. Refrigerant Temp.¹ | ||
23 | Evaporator Refrigerant Pressure¹ | ||
24 | Saturated Condenser Refrigerant Temp.¹ | ||
25 | Condenser Refrigerant Pressure¹ | ||
26 | EXV Test - d/E (Only in STOP/RESET)¹ | d | |
27 | Compressor % RLA (Highest leg)¹ | ||
28 | % Line Volts (Optional) | ||
29 | Compressor Starts (Optional)¹ | ||
2A | Compressor Hours (Optional)¹ | ||
2b | Compressor Test d/E | d | |
| ¹ Displayed by compressor/circuit | |||
Compressor Starts, Compressor Hours and % Line Volts will be displayed as dashes 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).
Auxiliary Options - Menu 3
Auxiliary Options - Menu 3
Selected by setting the number 3 in the “P” menu number position. Compressor/circuit indicators will not be lit continuously in this menu to indicate which compressors/circuits are running.
| Display Code | Description | UCM Based Defaults | Setpoint Range |
|---|---|---|---|
P | |||
30 | External Chilled Water Setpoint - d/E | d | |
31 | External Current Limit Setpoint - d/E | d | |
32 | Ice Machine Control - d/E | d | |
33 | Active-Ice Termination Setpoint¹ | ||
34 | Front Panel Ice Termination Setpoint | 27 F | 20 to 31 F |
35 | Return Reset - d/E² | d | |
36 | Zone Reset - d/E² | d | |
37 | Outdoor Reset - d/E² | d | |
38 | Reset Ratio Setpoint³ | ||
| Return | 50% | 10 to 120% | |
| Zone | 100% | 50 to 300% | |
| Outdoor | 10% | -80 to 80% | |
39 | Start Reset Setpoint³ | ||
| Return | 10 F | 4 to 30 F | |
| Zone | 78 F | 55 to 85 F | |
| Outdoor | 90 F | 50 to 130 F | |
3A | Maximum Reset Setpoint³ | ||
| Return | 5 F | 0 to 20 F | |
| Zone | 5 F | 0 to 20 F | |
| Outdoor | 5 F | 0 to 20 F | |
3b | External Circuit Lockout d/E | d | |
¹ Dashes are displayed for the setpoint when the chiller is not in the “Ice Building” or “Ice Building Complete” mode. ² The UCM will permit only one type of reset (Return, Zone, or Outdoor) to be selected at one time. For example, if Return Reset is enabled, an attempt to enable Zone Reset would disable RETURN RESET and enable Zone Reset automatically. ³ The UCM contains setpoints for each of the types of reset. The setpoint displayed will be for the type of reset enabled. If no reset is enabled, dashes will be displayed. | |||
Factory Display #1 - Menu 4
Factory Display #1 - Menu 4
Selected by setting the number 4 in the “P” menu item. Unlike menus 0 through 3, the number 4 can only be set by entering a combination of numbers. This combination consists of a sequence of “P” menu numbers -0, 1, 2, 1, 2, 3, 2, 3. 4.
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.
| Display Code | Description | UCM Based Defaults | Setpoint Range |
|---|---|---|---|
P | Menu Number | ||
40 | Leaving water Temp. Cutout Setpoint | 35 F | -10 to 35 F |
41 | Low Refrigerant Temp. Cutout Setpoint | 22 F | -39 to 35 F |
42 | Condenser Limit Setpoint - % HPC | 90% | 80 to 120% |
43 | Lead/Lag - d/E | E | |
44 | SI Display Units - d/E | d | |
45 | Unit Line Voltage¹ | 460 V | |
46 | Under/Over Voltage Protection - d/E | d | |
47 | Phase Imbalance Protection d/E | E | |
48 | Phase Reversal Protection d/E | E | |
49 | Superheat Setpoint | 8 F | 4 to 20 F |
4A | EXV Control Response Setpoint² | 20 | 2 to 200 |
4b | LWT Control Response Setpoint | 40 | 2 to 220 |
4C | ICS Address (Optional) | ||
4d | Fan Control Deadband Bias² | 0 | -50 to +50 |
4E | Programmable Relay Setup (see Alarm/Running/Maximum Capacity Contact Outputs) | 1 | 1 to 12 |
4F | Restart Inhibit Timer | 120 sec. | 30 to 120 sec. |
¹ Entry will be selected from 200, 220, 230, 346, 380, 415, 460, 500 or 575 volts. Dashes will be displayed if the Under/Over Voltage Protection option is not installed. ² Displayed by circuit. | |||
Factory Display #2 - Menu 5
Factory Display #2 - Menu 5
Selected by setting the number 5 in the “P” menu item. Unlike menus 0 through 3, the number 5 can only be set after menu 4 has been selected, as described on the previous page.
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.
| Display Code | Description | UCM Based Defaults | Setpoint Range |
|---|---|---|---|
P | Menu Number | ||
50 | Number of Compressors | 1 | 1, 2, 3, 4 |
51 | Compressor Tons¹ | 100 | 25, 30, 40, 50, 60, 70, 85, 100 |
52 | Low Water Temp EXV Gain Compensation d/E | d | |
53 | Fan Control - d/E | E | |
54 | Fans per Circuit² | 7 | 4, 5, 6, 7, 8, 10, 12, 14 |
55 | Reduced Inrush Starting - d/E | d | |
56 | Compressor Current Overload Setting (to match DIP Switch)¹ | 00 | 00 to 31 |
57 | GP Compressor Unit d/E | d | |
58 | Low Ambient - Half Air Flow Fan d/E | d | |
59 | LATSM d/E | d | |
5A | NNS d/E | d | |
5b | Number of EXV Valves per Circuit² | 1 | 1, 2 |
5c | Future Option** | d | |
¹ Displayed by compressor. ² Displayed by circuit. | |||
Products Affected:
- Air-Cooled Chiller (Pueblo) (RTAA 140-400 Ton)
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.