Johnson Controls System 450 Series Technical Bulletin page 10

Table 2: C450CCU menu blocks
Screens Description
Firmware version screens
0a-0b
• 0a: This screen is available when you turn on the controller. This is the complete firmware version.
• 0b: This is the SSM number for the hardware or firmware set.
1-3 Scrolling status screens: These screens are available when no alarm or defrost is active. If you do not touch a button after two minutes, the
screens appear and the screens change on 2 s intervals.
Defrost status screens: These screens display when a defrost cycle is active. Only one of the below defrost screens can display at a given
1a-3a
time and it is not a sequence of screens.
1a: When a defrost is active, this screen indicates there is a defrost active and displays the minutes remaining for the current
•
defrost or refrigeration-off period.
2a: This screen is available when you use an active defrost during the drip time and the minutes remaining for the current drip time.
•
• 3a: This screen is available when the evaporator fan delay period is in progress and shows the minutes that are remaining for the
fan delay period.
7-13 Alarm status screens:
• 7-13: These screens are available when one or more related alarms are active. The backlight of the screen flashes when an alarm
is active and the flashing stops when you click any button. If an alarm is still active when the UI times out, the screen continues
to flash. The Alarm Status Screens replace the scrolling status screens. You can press the right-arrow to see the Extended Status
Screens.
4-19 Extended status screens:
4: View the current value of Sn-2, the defrost termination sensor or switch. This value is a temperature if you use a temperature
•
sensor. The value appears as CLOS or OPen if you use a binary temperature switch.
5: On this screen, you can view one of the defrost status screens if a defrost is currently in progress.
•
• 6: On this screen, you can view the start time of the next scheduled defrost.
• 7-13: On these screens, one or more of the alarm status screens display for any alarms that are currently active in the controller.
• 14-19: On these screens, you can view the status of the outputs that are configured in the controller. The upper half of the display
alternates between the name of the output and the status of the output.
20-26 Sensor configuration screens:
20: The SENS configuration menu. Use these screens to configure the sensor types and error offsets for the sensors that the
•
refrigeration system uses.
21: On this screen, you can view the sensor type that measures the temperature of the refrigerated space. You can choose from the
•
following options: ----, °F or °C. The default sensor type is °F.
22: On this screen, you can view the error offset for sensor Sn-1. Limits: +/-5 °F or +/- 3.0 °C. The default error offset value for Sn-1 is
•
0.
23: On this screen, you can view the sensor type for Sn-2 that is used for defrost termination. You can choose from the following
•
options: ----, °F, °C or bin. The default value is °F.
24: On this screen, you can view the error offset for sensor Sn-2: This screen is available if the Sn-2 sensor type is set to °F or °C. For
•
more information, see screen 23. Limits: +/-5 °F or +/- 3.0 °C. The default error offset value for Sn-2 is 0.
25: On this screen, you can view the sensor type for Sn-3. You can use this sensor to measure the pressure of the suction line of the
•
system. You can choose from the following options: ----, P100, P110, P200, P8, P15. The default value is ----.
26: On this screen, you can view the error offset for sensor Sn-3. This screen is not available if the Sn-3 sensor type is set to ----. For
•
more information, see screen 25. Limits: +/- 10 psi or +/- 0.70 bar.
10 System 450 Series C450CCU Condensing Unit Control System Technical Bulletin