Generac Power Systems PWRcell Reference Manual page 46

Section 7 PWRcell Battery
No Comms from Battery to Inverter
If REbus is present at the battery terminals and the
battery status LED is illuminated, but the device is not
appearing on the inverter screen, this likely indicates that
there is a communications issue between the inverter
and the battery.
1. Confirm that there is a direct ground wire between
the inverter and the green REbus terminal on the
battery and the ground bus bar at the inverter.
2. Verify that the battery and inverter are using the
same PLM channel:
a. Check the inverter PLM channel by going to
the Mod Settings page of the inverter on the
ICM and checking the PLM_Channel setting.
(1) If battery is new, it will be set to channel 1
by default, so inverter will need to also be
set to channel 1 to communicate with it.
(2) If battery is previously programmed to a
different PLM channel, the inverter
channel will have to be changed to match
before communications with the battery
will function.
NOTE: The inverter can be changed to channel 0 to
communicate with any PLM device. Do not do this prior
to powering down all other inverter systems at a multi-
inverter site. See Commissioning Multiple Inverter
in
Systems Appendix B
"Battery Not Ready"
If, after enabling the battery, the inverter displays the
message "Battery Not Ready," this indicates that the
battery controller is not able to detect an expected battery
voltage on its input terminals.
1. Check that the battery disconnect switch on the
upper left corner of the battery cabinet is switched
on.
2. Check the battery fuses. Measure the voltage on
each side of the fuse blocks on the battery using a
DMM set to measure DC voltage.
a. Measure the right side of the fuse blocks with
the red probe on the contact for the red wire
and the black probe on the contact for the
black wire.
b. Repeat this procedure on the left side of the
fuse block.
c. The voltages should be within less than 1V of
each other. If not, confirm that the fuses are
present and intact.
d. If there is adequate stack voltage on the right
side of the fuses but 0V on the left side, the
fuses are likely blown. Check for continuity.
3. If the voltage measured at the right side of the
battery fuse block is near 0V:
42
Inverter.
a. Verify that any unused connectors on the
battery power cables are all filled using the
provided loop jumpers and that the jumpers
are well-seated (see
necessary if the battery contains fewer than 6
battery modules.
b. Verify that the battery power cables are
correctly connected (see
that all power cables are well-seated.
4. If the voltage at the right side of the fuse block is
more than 0V, confirm that the voltage matches the
expected battery stack voltage.
NOTE: The typical battery voltage is a function of the
total number of battery modules. The voltage for one
battery module can vary between 42V and 52V. Multiply
this range by the number of modules to get the total
battery voltage. For example, a 6-module battery will
have a typical voltage range of between 252V and 312V.
Verify that the Status and SoC indicators on the battery
modules are all on.
a. If any of the battery modules have indicators
that are off:
(1) Confirm that all battery modules are right-
side up. The COM IN port should be
above the COM OUT port on the modules.
(2) Verify that the COM cables are correctly
connected per the installation instructions
(see
Battery Wiring Sequence
Diagrams
(3) Confirm that all COM cables are well-
seated.
(4) Check battery module comms cables for
continuity using a data tester.
NOTE: After correcting any issue detected in the steps
above, a full system reset may be necessary for the
battery to re-initialize communications with the modules
and resume functioning correctly.
Error
After enabling the battery, if an "Error on PWRcell"
message is displayed on the inverter screen and the
battery cabinet status LED is blinking red, this indicates
that an unexpected event has occurred on the battery,
and manual intervention is necessary.
1. Disable and the re-enable the battery.
2. Perform a REbus power cycle.
3. Verify the battery module status lights (blinking red
indicates an error with that module).
4. If the error persists, contact Generac PWRcell
Technical Support 855-635-5186.
Figure 7-1). This is only
7-1). Confirm
Figure
in Appendix E Battery).
Diagnostic Repair Manual