Operating instructions

Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
266 Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
When changing over to inverter operation, initially contactor K2 must be opened and after
the de-excitation time, contactor K1 is closed. The inverter then captures the rotating motor
and the motor is operated on the inverter.
Bypass function when activating via a control signal (p1267.0 = 1)
The status of the bypass contactors is evaluated when the inverter is switched on. If the
automatic restart function is active (p1210 = 4) and an ON command (r0054.0 = 1) as well as
the bypass signal (p1266 = 1) are still present at power up, then after power up, the inverter
goes into the "ready and bypass" state (r899.0 = 1 and r0046.25 = 1) and the motor
continues to run directly connected to the line supply.
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Figure 7-21 Bypass control independent of the speed via a control signal (p1267.0 = 1)