Operating manual PxtFX active energy management device
V1.1DE/EN
29
6
Operation
English
6.4
Discharging and disconnecting the PxtFX active energy
management device
Basic information
• As long as the energy storage of the PxtFX active energy management device is
charged with energy, it is forbidden to disconnect the PxtFX active energy man
-
agement device from the DC circuit (DC link).
Fig. 17: Charge status of LEDs
• When looking into the device from above, flashing LEDs
indicate that the cor
-
responding device is still charged.
The commissioning
procedure
Disconnect the DC circuit (DC link) from the power supply and switch off 24 V.
PxtFX is discharging.
Depending on the number of energy modules, this can take several minutes
(
Page 38, chap. 8.10 "Discharging / removing the PxtEX extension unit").
Wait until the operating displays L1 to L4 are no longer lit.
The storage tank must now be discharged to a voltage of <60 V.
Measure voltage at terminals "Drive +" and "Drive -" (X1, Pin 2 and 3) and
"S" and "Storage -" (X5, Pin 1 and 3).
Disconnect the PxtFX active energy management device from the DC circuit.
If your application requires a fast, active discharge, please contact Michael Koch
GmbH for project planning.
Risk of damage!
Disconnecting the PxtFX active energy management device
while the storage is being charged will destroy the device.
Unauthorized disconnection can also be caused by incorrectly
dimensioned fuses in the connection to the DC circuit (DC link).
