OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 45/54
P1, P2; P3, P4: probe failure alarm
It is generated by failure in the probe P1, P2 or P3.
In case of P1 fault, number of steps engaged depends on the SPr parameter.
In case of P2 fault, number of fans engaged depends on the FPr parameter.
If the P3 or P4 probe is used for dynamic set point
The function is disabled and only the standard set point is used.
If the P3 or P4 probe is used for analog output
The function is disabled, the value of the analog output is set in the SAo parameter.
RECOVERY
Automatic as soon as probe restarts working.
C1HA, C1LA, F - HA, F - LA High and low pressure (temperature)
alarms for compressors or fans
This alarm signals that the pressure (temperature) is out of limits established by parameters LAL
and HAL for compressors and LAF - HAF for fans.
The tAo and AFd parameters set the delay between alarm condition and alarm signaling.
ACTION
The alarm is signaled with standard action. The outputs are unchanged.
20.2 Buzzer muting
Press any buttons to silence the buzzer during an alarm condition.
Hold pressed for more than 3 seconds switch off the alarm relay during an alarm condition.
20.3 Alarm conditions – summary table
CODE MEANING CAUSE ACTION RESET
pressure-
switch alarm
rature less than
ELP value.
are turned off.
Fans
pressure/temperature increases more than
ELP value
switch alarm
switch input
enabled.
are turned off.
Fans
unchanged.
Automatically (if the number of activations
are less than PEn in the PEi time) when the
input is disable.
- The compressors restarts working according
to the working algorithm.
Manually (if PEn activation happened in the
PEi time)
When the input is disable:
a. hold pressed the Restart (DOWN) key for
3 seconds or
b. turn off and on the instrument.
- The compressors restarts working according
to the working algorithm.
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