When an alarm is active or has not been acknowledged, an alarm symbol appears at the top of the display and the alarm is added to the alarm list.
A-alarm:
- The unit stops *1.
- Manual acknowledgement of alarms is required, and faults must be rectified before restarting *2.
*1 In an emergency, parameter 480 is activated (setting = Yes, see parameter list), the exhaust fan and heat exchanger continue to run provided that the exhaust fan has not triggered an alarm.
*2 To exit emergency mode, the fault must be rectified and acknowledged, then the unit must be stopped before it is restarted.
B alarm:
- The unit continues to run.
- Manual acknowledgement of alarms.
C alarm:
- The unit continues to run.
- Automatic acknowledgement when the alarm returns to normal or manual acknowledgement of alarms.