Section 7: Troubleshooting; General Troubleshooting - Generac Power Systems PWRcell M3 Installation Manual

Section 7: Troubleshooting

General Troubleshooting

Some of the more common problems are listed in the table below. This information is intended to be a check or
verification that simple causes can be located and fixed. It does not cover all types of problems. Procedures requiring
in-depth knowledge or skills should be referred to a Generac Authorized Service Dealer.
Problem
Battery remains in
Waiting state, or shows
"Battery Not Ready"
Battery not recognized by
inverter
If problems persist, contact the nearest Independent Authorized Service Dealer (IASD) or Generac Customer Service
at 1-888-436-3722 (1-888-GENERAC).
Installation Manual for Generac PWRcell Battery
Table 7-1. General Troubleshooting Guide
Possible Cause
Battery Disconnect Switch OFF
Battery stack voltage is zero volts /
incomplete series connection
Battery comms cables are out of
sequence or not fully connected
Battery fuse(s) are blown
Inverter disabled
REbus not operating
DC disconnect OFF
Loose connection
Insufficient voltage
Inverter and battery not using same
PLM channel
Solution
Turn battery disconnect switch ON.
Measure stack voltage using digital multi-meter at screw
terminals on either side of fuse blocks or at main power
harness connector. If zero volts measured, ensure looped
jumpers are installed at any vacant module positions, and
ensure power plugs are fully seated at each battery module.
Double check Cat 5 sequence from module to module.
Make sure module is not upside down.
Ensure Cat 5 cables are fully seated.
Unplug one battery module before opening fuse holders.
Remove fuses and test each fuse for continuity using a
digital multi-meter.
Enable inverter.
Verify REbus is operating correctly.
Verify inverter is disabled, then turn DC disconnect ON.
Verify connections are secure.
Measure voltage at the REbus terminals; there should be at
least 360V between RE+ and RE-.
Set inverter and battery to same PLM channel.
Troubleshooting
37