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Section 9: 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 that
require in-depth knowledge or skills should be referred to an Independent Authorized Service Dealer.
Problem
System will not exit
Shutdown.
CTs will not calibrate.
No REbus Beacon device
page.
Inverter isn't connected to
server.
During an extended or multi-
day grid outage, the system
turned OFF overnight (i.e. the
screen went blank).
Utility grid power went out;
backup loads are not being
powered; inverter screen is
ON.
Utility grid power went out;
backup power is cycling on
and off; Inverter screen is
powered ON.
Utility grid power went out;
backup loads are not being
powered; screen went blank.
Utility grid power has been
restored after an outage;
backup loads are not being
powered; screen is ON.
If problems persist, contact the nearest Independent Authorized Service Dealer (IASD), contact Generac PWRcell Technical Support at 1-855-635-
5186, or call Generac Customer Service at 1-888-436-3722 (1-888-GENERAC).
Installation and Owner's Manual for Generac PWRCell Inverter
Table 9-1. General Troubleshooting Guide
Possible Cause
External shutdown button depressed
No jumper between STOP terminals
Loose connection
Improper CT placement
Beacon USB cable not connected
Beacon wrap-around cable not
connected
Inverter not connect to the Internet
The battery may have discharged to
its Minimum State of Charge (SoC)
and gone to sleep. See Sleep Mode
in the PWRcell Battery Installation
and Owner's Manual.
The protected loads disconnect on
the inverter Power Core may be in the
OFF position.
This could be due to an overload
condition where having too many
house loads on at one time has
caused the inverter to protect itself by
purposely blacking out and cycling on
at an increasing interval.
The battery may not have been
properly connected or fully
commissioned prior to the outage.
Reference Battery Status LED table in
PWRcell Battery Installation and
Owner's Manual for confirmation of
battery state/ functionality.
REbus sources are depleted or not
available (battery / PV Links). The
inverter assumed worst case scenario
and protected itself from overload.
Release external shutdown button.
Verify jumper is in place between STOP terminals.
Check CT wiring.
Ensure CTs are placed upstream of the point of interconnection.
Verify the USB cable is correctly connected to the Beacon and also to the
Beacon accessory port in the inverter wiring compartment. Inspect
exposed sections of cable for damage.
Verify the short wrap-around cable is plugged into Beacon, from one port
to the other.
Verify the inverter is connected to the Internet via a router.
Wait until grid power returns or until the sun rises. In an extended outage,
the battery will perform a power search every hour for four minutes
(default). Once solar power is detected during a power search, the
battery will keep the system awake and begin charging/powering loads.
See Power Search and reference the Battery Status LED in the PWRcell
Battery Installation and Owner's Manual.
Turn the inverter protected loads disconnect to the ON position.
Inverter LED will be alternating at an interval- blinking green, then solid
red. The home screen and the inverter device page will show "Islanding"
or "Islanded" respectively, alternating with "Island Overload."
Reduce house loads to recover from this condition.
Contact Independent Authorized Service Dealer (IASD) for service.
Cycle the inverter backfeed breaker OFF/ON. If problem persists, contact
Independent Authorized Service Dealer (IASD) for service.
Troubleshooting
Solution
61
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