EVCO EPU2LXP1CH Installer manual - Manual (Page 67)

EVCO S.p.A. c-pro 3 micro CHIL | Application manual ver. 1.0 | Codice 144CP3CHE104
page 67 of 120
8.10.1 Pump Status
To each pump, an operating status is associated, which is visible from the associated LED or in the status template from the main
menu. Each pump can take on the following statuses:
Disabled: The pump has not been configured, the status display shows “-”.
On: The status display shows “ON”.
Off: The status display shows “OFF”.
Alarm: The pump is in alarm status. The status display shows “ALARM”.
In the Maintenance Operator menu, via parameters PM31 and PM32, it is possible to read the number of operating hours of the
corresponding pumps. To zero these hours when required, it is sufficient to enter a “0” value, using the ENTER key.
8.10.2 Flow Meter Management
The flow meter is continuously monitored once the chiller is started and the Flow meter start delay PA01 has been expired. If the
contact indicates a lack of flow, the flow meter alarm is immediately triggered. The compressors will not be commanded when there is a
flow meter alarm.
During normal operation, the flow meter is constantly monitored; if the contact signals a lack of flow for a period exceeding the value of
parameter Flow-meter alarm by-pass PA02, the associated alarm is immediately triggered, and all active compressors are switched
OFF.
If the alarm should persist for a time equal to the value of parameter Pump operating time at low water level PP09, the pump is also
switched OFF, and the alarm becomes a manual reset. The pump is thus protected against potential operation without water. The pump
is then restarted when the alarm is reset.
The flow-meter alarm is an automatic-reset alarm, unless it exceeds a given number of events within one hour (Max. number of flow
alarms with auto-reset PA03), in which case it becomes a manual reset.
Unit
ON
OFF
Flow
ON
ON
Alarm
PA01 PA02 PA02