ECH 200 BD
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10 DIAGNOSTICS
“Ech 200” can perform full systems diagnostics and signal a series of alarms.
Alarm trigger and reset modes are set using parameters Pa A01 – Pa A26.
For some alarms the signal will not be given for a certain amount of time, determined by a parameter.
For some alarms the number of alarm events is counted: if the number of alarm events in the past hour exceeds a certain
threshold set by a parameter, the alarm will switch from automatic to manual reset.
Alarms are sampled every 225 seconds;
Example: if the number of events/hour is set to 3, the duration of an alarm must fall between 2*225 seconds and 3*225
seconds for the alarm to be switched from automatic to manual reset.
A: Automatic reset
M: Manual reset
Alarm: alarm
Sampling: alarm sampling
Time: time
If an alarm is triggered more than once within one sampling period (225 seconds), only one alarm will be counted.
Alarms with manual reset are reset by pressing the ON-OFF button and releasing.
Manual reset shuts down corresponding loads and requires an operator to intervene (reset the alarm using the ON-OFF
control).
Manual reset alarms are used mainly to identify problems which could result in damage to the system.
10.1 List of alarms
When an alarm is triggered, two things occur:
• The corresponding loads are shut down
• The alarm appears on the keyboard display
The alarm message consists of a code with the format “Enn” (where nn is a 2-digit number identifying the type of alarm,
such as: E00, E25, E39….).
All possible alarms are listed in the table below, along with their codes and the corresponding loads that will be shut
down:
Alarms
Alarm events per
hour
225 s 225 s 225 s 225 s
123
Time
Sampling
Alarm
A M
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