OPERATING INSTRUCTIONS
CO
2
/NH
3
CASCADE UNIT
250 - 1000 KW
28 _551511_om_kas_gbr_1_.doc
2.2.4 Status messages
[Chapter 1.3. in User Manual]
key several times, or press the key and then .
Open the "status messages" display, press the
This view not only shows the most informative actual values but also the status of the unit / the cascade.
fig. 23: "Status messages" display
PV: Actual value (pressure or temperature) display always in °C
SP: Set Point display in °C
Pos: Current control slide position in %
Imot: Motor current in A
Tc: Condensation temperature in °C
dPoil: Differential oil pressure in bar
Hint!
See menu 05 actual values
The status provides information about the current operating status of the aggregate / cascade.
The following status messages are possible:
Initialisation of the control after switching on the power supply or after saving the
settings (RAM → ROM)
Initialisation
A starting frequency limiter of the compressor drive motor is still active.
EHB 01
A start lock-out is active, the oil pump has run too long by itself. (Minimum position
not reached during switching on or off procedure)
Oil drain 01
Unit/ cascade ready to start but one or several starting conditions are still not
fulfilled, e.g. cut-in temperature in automatic mode not yet reached
Standby 01
The control is waiting for an external starting release signal.
Release start 01
Starting command issued, control slide moves into the minimum position.
Forced slide to min 01
Compressor motor has been started but the switchover in "delta! has not yet taken
place of the startup has not yet been completed.
Startup 01
Compressor running in "delta" or startup has finished, the unit / cascade is in
operation.
Running 01
An output limiter is active (suction pressure too low), "reduce output" solenoid valve
is opened.
Limit suct press 01
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