Installation Guide

The charge controller’s
Error/ Warning (red)
LED is on, and the SCP
indicates an output
under voltage error
(F11) for the charge
controller.
A. The default configuration for the charge
controller is a 48 V battery bank, and you
have installed the charge controller on a 24 V
battery bank.
B. The batteries are dead or undercharged.
A. Use the SCP to configure the charge controller
for 24 V operation. See “Configuring Battery
Characteristics and Battery Charging” in the Conext
MPPT 80 and MPPT 100 Owner's Guide for more
information.
B. Check the battery voltage to see if the batteries
are within operating specifications. If necessary,
replace them with new batteries, or use a device
capable of performing dead battery charging.
The charge controller
does not show up on
the SCP or it drops off
the network
periodically.
A. Network terminators have not been
installed at both ends of the Xanbus network.
B. The total network length exceeds the
maximum length specification.
A. Install a terminator at each far end of the
network. See Network Components on page 39 for
more information.
B. See Network Layout on page 40 for
specifications.
The charge controller
does not produce any
power.
A. No PV input voltage.
B. PV input voltage is not within operating
range.
A. Change the PV disconnect switch from the off
position to the on position.
B. Make sure that the PV panels are configured to
provide voltages within the charge controller’s
operating voltage window.
The system is very slow
to respond, does not
update data, takes a
long time to start unit
when applying PV
voltage.
Low Power (Night) mode is selected and PV
voltage at the unit is low (below 195V) or
disconnected. In this case the unit wakes up
to check PV voltage and transmit data on
Xanbus once every 2 minutes and goes back
to sleep if the PV voltage is still low.
Low power mode is enabled by default from the
factory. This mode can be disabled under
Advanced Features on the SCP. When disabled,
the unit will remain awake and responsive as long
as battery voltage is present. Note that this
increases power consumption at night.
All of the charge
controller’s LEDs are off
and the charge
controller does not
show up on the SCP.
A. No battery connection to the charge
controller.
B. The charge controller is wired incorrectly.
C. Charge controller is not operational.
A. Change the battery disconnect from the off
position to the on position.
B. Check all connections and correct the wiring if
voltage is not present on the charge controller’s
battery terminals.
C. If you have verified there is at least 20 V present
on the charge controller’s battery terminals yet the
On/Charging (green) LED remains off, contact
customer service.
Troubleshooting Conext MPPT 80 and MPPT 100 Installation Guide
990-91319 This document is for use by qualified personnel 52