Critical Alarms; Alarm Screen Messages - Black Box CRCW-12 User Manual

4.5.3.3 Critical Alarms

Critical alarms will coincide with automatic shutdown of the A/C unit(s) equipment as needed to prevent possible system
damage. The A/C unit(s) equipment will remain shut down until the alarm condition(s) are no longer sensed and the controller
has been reset.
Some examples of critical alarms are:
• No Airflow (Air-Proving Switch)
• Fire/Smoke Detection
• Off by Internal Alarm (Only for grouped systems)

4.5.3.4 Alarm Screen Messages

Alarm Release
High Temperature
Low Temperature
High Humidity
Low Humidity
Sensor Failure
Communication Failure
Condensate Pan Full
Moisture
Fan Failure
Change Filter
Humidifier Alarm
No Airflow
Smoke/Fire
Optional Temp High Alarm
Optional Temp Low Alarm
Power Source A Lost
Power Source B Lost
Water Temp High Alarm
Water Temp Low Alarm
No Flow (Water Temp Sensors)
No Flow (Flow Switch)
Table 4-3. Alarm screen messages.
Description of Alarm Conditiion
Air temperature is above user-defined alarm setpoint.
Air temperature is below user-defined alarm setpoint.
Humidity is above user-defined alarm setpoint.
Humidity is below user-defined alarm setpoint.
Sensor is disconnected or faulty. (The failed sensor is identified.)
External and/or internal communication lost (BMS or pLAN).
Full. Water level in condensate pan is reaching an unsafe level.
Water sensed by any combination of a leak detector or condensate pan level switch.
Upper, middle, and/or lower fan failure.
Filter replacement time interval elapsed; filter needs to be replaced.
Humidifier fault detected.
Insufficient airflow per air-proving switch.
An alarm condition detected by the smoke detector or firestat.
Temperature is above alarm threshold (user configurable).
Temperature is below alarm threshold (user configurable).
Power source A not detected.
Power source B not detected.
Supply fluid temperature is above alarm threshold (user configurable).
Supply fluid temperature is below alarm threshold (user configurable).
No chilled water flow detected by temperature sensors (optional).
Insufficient flow of chilled water detected by flow switch.
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Chapter 4: E2 Controller
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