ECKELMANN VS 3015 C, Инструкция по эксплуатации

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Compressor shutdown for HP EMERGENCY OFF
All compressor stages are shut down immediately if the measured high pressure exceeds the limit value HP
EMERGENCY OFF (menu 3-3) . A compressor enable is performed when the HP value has fallen below the
limit value HP On Comp (menu 3-3) again. They are then loaded again stage by stage. The error message " HP
EMERGENCY OFF " is generated if the high pressure exceeds the HP EMERGENCY OFF limit value.
Compressor shutdown in the case of high pressure fault
One compressor is unloaded if the high pressure exceeds the limit value HP Off Comp (menu 3-3). Other
compressors are unloaded with increasing high pressure. The unloading points for the other unloads are
dependent on the number of compressors and on the parameter
HP EMERGENCY OFF (menu 3-3). The
switching intervals are calculated so that the shutdown of the last compressor is performed when reaching a
pressure of
HP EMERGENCY OFF . While the limit value HP Off Comp is exceeded, any shifting down of the
compressor stages by the suction pressure regulation is still only performed using the basic switch-off time in
order to reduce the high pressure more quickly. If the limit value
HP Off Comp has been exceeded, compressor
stages are not loaded again until the limit value HP On Comp has been undercut again. An exception is the
heat recovery mode. In the HRC and HRC Bypass modes. no compressor shutdown and no compressor
disable are performed but instead speed reduction (see Speed reduction in the event of high pressure fault
below). In heat pump operation (parameter
HRC-Pump , menu 3-2-2-3), one capacity stage can be unloaded.
The HRC Bypass operation and heat pump operation are only possible in combination with a Coolheat or
ECOCool controller.
Speed reduction in the case of high pressure fault (only for combined control)
If the compressor is controlled using combined control, the maximum compressor speed can be reduced with
rising pressure. The speed reduction depends on the parameters
HP Off Comp , HP On Comp and Weighting
C.OFF (menu 3-3). As default, the pressure reduction starts when the average value of HP Off Comp and HP
On Comp is exceeded. The start value can be shifted using the Weighting C.OFF parameter. A higher value
shifts the start point in the HP On Comp direction, a lower setpoint in the HP Off Comp direction and thus to a
higher pressure level. The compressor speed is limited to Min. speed (parameter in menu 3-3) if the high
pressure reaches the HP Off Comp limit value.
High pressure fault alarm signalling
If the high pressure exceeds a limit value that is calculated using the parameters HP Off Comp , HP On
Comp and Weighting C.OFF (menu 3-3), the error message High HP is generated after a configurable time
delay (parameter Del. tc/HP OFF , menu 3-3). As default, the limit value is calculated from the average value of
HP Off Comp and HP On Comp . The limit value can be shifted using the Weighting C.OFF parameter. A higher
value shifts the value in the HP On Comp direction, a lower setpoint in the HP Off Comp direction and thus to a
higher pressure level. No signal is generated In the heat recovery mode. In the event of any pending HP fault,
no additional compressor output stages are switched on. The following diagram is a graphical representation of
the entire HP monitoring using the example of a system with four compressors: