ECKELMANN VS 3015 CT, Инструкция по эксплуатации, Страница: 107 / 219

Firmware V1.41 V1 08.11.2022 107/219
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5.12.11 Refrigerant Monitoring
The liquid level in the installation is monitored by a refrigerant level sensor connected to digital input 23
(terminals 94/95). The status of the refrigerant level sensor (ON/OFF) is scanned and recorded in a cycle of
seconds using a configurable time interval (parameter
Interval , menu 3-4). This parameter defines the duration
of a measuring cycle. If the percentage of "Good states" falls below the parameter threshold (menu 3-4), an
alarm is signalled.
The Niveau is calculated using the following formula:
After any power failure, the refrigerant level is set to 100%. A measurement result is not available until the
interval time has elapsed. The calculated
Niveau can be checked in menu 2-4 (Installation actual values).
5.12.12 Monitoring of the Fast Unload / External Off
The pack controller can be switched off via digital input 16 "Fast unload/External Off" (terminals 84/85). The
following occurs when the input is activated:
Fans and compressors are turned off in quick succession (2 seconds unload time).
The consumer enable of the associated UA 300 / UA 400 case controllers is revoked,
unless the low
pressure is too low.
The fault signal
Comp/cond OFF is output.
The pack controller is shown in grey in the store view of the PC software LDSWin.
The medium pressure valve (MPV) is closed if all compressors are switched off (analogue output 4,
terminals 63/64 at 0 volts).
5.12.13 Monitoring of Rupture Disk / Maximum Refrigerant Fill Level
A rupture disk can be monitored using the digital input 22 (terminals 92/93) of the controller or the maximum fill
level of the refrigerant can be monitored via an additional level switch. It can be selected using the parameter
Max.Niveau (menu 3-4) which of the two monitoring functions is active. If the parameter Max.Niveau is set to
ON, it is monitored via the input 22 whether the maximum refrigerant fill level is exceeded. If the parameter
Max.Niveau is set to OFF, the rupture disk is monitored via the input.
Rupture disk function
If there is no voltage at the input, the message "Rupture disk leak" is output. The message is transmitted
according to preselected priority. The digital input has no influence on the control and regulation processes.
Monitoring max. refrigerant fill level function
If there is no voltage at the input, the message "Max.Refrig.level+" is output. The message is transmitted
according to preselected priority. If the parameter Dis. Max.level (menu 3-4) is set to Y, the system is blocked in
the event of tripping the alarm to prevent the liquid refrigerant reaching the compressor. The system is not
enabled again until the alarm has been reset or the digital input 22 is energised with 230 V again (level switch
for
Dis. Max.level in the good state). If the parameter Dis. Max.level (menu 3-4) is set to N, the tripping of the
digital input has no influence on the control and regulation functions.
The deactivated switching frequency limitation for speed-controlled compressors is activated again in
the event of any FC error.

The tripping of the refrigerant level sensor has no influence on the control and regulation functions. 