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Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
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Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Special features of the essential service mode
●
The automatic restart function is internally activated – independent of the setting of p1210
– as soon as the essential service mode kicks in. This results in the inverter being
restarted if a pulse inhibit (OFF2) occurs due to an internal fault.
●
In the essential service mode, inverter shutdown due to faults is suppressed, with the
exception of faults that would lead to the destruction of the inverter. You will find a a list of
these faults in Section Essential service mode (Page 252).
●
The essential service mode is triggered by a continuous signal (level-triggered) using the
digital input which was defined in p3880 as the source for the essential service mode.
●
In the essential service mode, the motor can only be stopped if the line voltage is
switched off.
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If the essential service mode is deactivated, the inverter reverts to normal operation and
its behavior depends on the pending commands and setpoints.
●
The essential service mode has priority over other operating modes
NOTICE
Loss of warranty for an inverter in the essential service mode
In the case of the essential service mode, the customer can no longer lodge any claims
for warranty. The essential service mode and the faults that arise while in the essential
service mode are logged in a password protected memory and can be read by the repair
center.
Refer to parameters p3880 … r3889 for more information on the essential service mode.
Note
Other preconditions for the essential service mode
In order to operate the inverter in the emergency service mode, the appropriate degrees of
protection and connection and installation guidelines applicable to the system should be
observed. You will find details of this in the Australian Standard: AS/NZS 1668.1:1998.
Summary of Contents for SINAMICS G120 CU230P-2
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