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Example
: Compressor with three-stage capacity control (
No.cap.stages
= 3)
Fault on
Base load rotation output Relay stages OFF output Message
Compressor 1 ON
Stage 4, stage 5, stage 6 Message C1
OFF
Stage 1, stage 2, stage 3
Compressor 2 ON
Stage 1, stage 2, stage 3 Message C2
OFF
Stage 4, stage 5, stage 6
5.12.3 Low pressure monitoring
Low pressure too low
If the low pressure falls to a configurable limit value (menu 3-3
to MP Off Comp
), all compressors are switched
off. If the low pressure rises to the proportional t
0
se NZ/2 pressure value, the compressors are
activated stage by stage. An alarm is signalled after expiry of a configurable delay time (menu 3-3
Del. to OFF
).
The LP monitor is also evaluated. If the pressure drops below the limit value of the LP monitor, a forced
shutdown of all compressors occurs.
Low pressure too high
The alarm "
high low pressure
" is signalled if the low pressure exceeds the configurable limit value NP Max.
(menu 3-3). This alarm signalling has no effect on the control action of the pack controller. The alarm is reset
when the limit value "NP Max" minus 1 bar is undercut.
5.12.4 High pressure monitoring
The high pressure is monitored by the pressure transmitter in the pressure hose and using HP limiters. If
multiple HP limiters are used, these must be connected to the controller in series. All compressors are unloaded
if their tripping pressure is exceeded.
Содержание VS 3015 C
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