ECKELMANN VS 3015 CT, Инструкция по эксплуатации, Страница: 94 / 219

Firmware V1.41 V1 08.11.2022 94/219
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Due to their arrangement in the safety chain, when a high priority safety contact (e.g. high pressure limiter) is
tripped, all lower priority alarm contacts are deenergised and thus active. The sending of low priority alarm
signals at the same time when a higher priority alarm event occurs is locked so that all secondary alarms are
not sent by the pack controller in this case.
5.12.1.1 Monitoring of Differential Oil Pressure Switch / Compressor High Pressure Limiter
The oil differential pressure, the high pressure at the pressure ports of every compressor, or both, can be
monitored via digital inputs with floating contacts. Using the parameter
Text Öl/HD-Stör (menu 3-1), it is
possible to select which type of pressure switches should be monitored via these inputs. This parameter can be
used to select the message text that is output when the signal inputs for the oil differential pressure switch / HP
monitor for compressors 1-12 are activated.
1 Oil diff. pr. Cx or
2 HP-Cutout Cx or
3 Oil/HP-Fault Cx
The priority of this message can be selected using the parameter Oil/HP-Fault (menu 3-7). The pressure
switches are open in the alarm state. If the pressure switch trips, the compressor is switched off immediately
and disabled for the following control processes. If it is reset, the compressor is enabled.
HP switch message transmission delay
If the inputs are configured as an HP monitor, an alarm message " HP-Cutout Cx " can be transmitted after a
time delay; the requirements for this are:
The alarm input is enabled using the parameter Oil/HP-Fault = YES
An alarm delay Oil diff. pr. greater than zero minutes is specified
The alarm priority is not "---"
If these requirements are met, in the event of a compressor HP fault, an alarm " HP-Cutout Cx " with the pre-
selected signal priority is not sent and registered in the message memory until the delay time has elapsed.
However, in order to ensure that any compressor HP fault is registered in the message list, a temporary
message (time stamps "come" and "go" simultaneously) with the priority "0" is registered when any compressor
high pressure fault is detected.
5.12.1.2 Monitoring of the Compressor Motor Overload Cut-Out
The compressor motor is monitored by the motor overload cut-out. The auxiliary contact is open in the alarm
state (no signal at the input of the controller). If the motor overload cut-out trips, the compressor is switched off
immediately and disabled for the following control processes. The compressor can be enabled again
automatically or manually if the motor overload cut-out is reset.
The type of compressor enable after tripping of a motor overload cut-out is defined using the parameter
Motor
protect. (menu 3-1). With the entry of Motor protect. Y , the compressor is switched off and permanently
disabled with the tripping of the motor overload cut-out. A manual enable must be performed (menu 3-1-c
Enable comp.stages ).
The error signal generated from the tripping of the motor overload cut-out is not cancelled until after the reset of
the motor overload cut-out
and after the manual enable of the compressor. With the entry of Motor protect. N ,
the compressor is switched off with the tripping of the motor overload cut-out. After the reset of the motor
overload cut-out, the compressor is automatically loaded again depending on demand. The default is
Motor
protect. Y .
The control processes when the motor overload cut-out is tripped for the manual enable ( Motor protect. Y ) and
automatic enable ( Motor protect. N ) are listed below.
The safety chain is valid for NT-, LT- and parallel compressors.

If no oil differential pressure switch or HP limiter is used, the monitoring of the oil differential switch /
HP limiter for the compressor can be activated / deactivated using parameters.
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