5.0
Operation
54
GenStar MPPT
55
5.6.3 Battery State-of-Charge (SOC) LED Indications
G
battV
>
13.3V
G / Y
13.0 < battV <= 13.2V
Y
13.2 < battV <= 13.0V
Y / R
LVR < battV <= 13.0V
R flashing
Instant LVD < battV <= LVD warning (1 per sec)
R
battV <= LVD
Note that because these State-of-Charge LED displays are for all battery types and system
designs, they are only approximate indications of the battery charge state. For precise SOC
monitoring, see Morningstar Battery Management System (BMS) Block accessory for use with
suitable batteries.
5.6.4 Ethernet Jack Indications
In addition to the SOC LEDs, two (2) small LEDs can be found on the Ethernet RJ-45 jack inside the
wiring box. These LEDs indicate the LAN/WAN network link and activity status as follows:
Condition
Green LED
Yellow LED
Network Connection OK
ON
OFF
Network Activity
ON
Blinking
Error
OFF
ON
5.7 Alarms and Faults
Alarms and faults are indicated with LEDs on the unit, and with brief descriptions in LiveView web
interface. Alarms are generally informational (see ReadyBlock Alarms below), and faults cause
interruption in operation.
5.7.1 Alarms
Battery Sense Out of Range / Disconnected
(only alarm with LED indications)
Status LED: Flashing red. Battery status LEDs: R/Y - G/Y sequencing. A battery sense wire is
disconnected. Inspect the battery sense connections. This alarm is set when the voltage at the
battery sense terminals differs by more than five volts from the voltage at the battery terminals.
Current Limit
The array power exceeds the rating of the controller. This alarm indicates that the GenStar MPPT is
limiting battery current to the maximum current rating.
Heatsink Temperature Sensor Open / Shorted
The heatsink temperature sensor is damaged. Contact your Authorized Morningstar Dealer for
service.
High Input Voltage Current Limit
The GenStar MPPT will limit the solar input current as the solar array Voc approaches the maximum
input voltge rating. The array Voc should never exceed the 200 Volt maximum input voltage - see
the array voltage de-rating graph in Appendix.
High Temperature Current Limit
The GenStar MPPT will limit the solar input current if the heatsink temperature exceeds safe limits.
Solar charge current will be tapered back (to 0 amps if needed) to reduce the heatsink temperature.
The Appendix B de-rating graphs indicate maximum ambient temperatures at which the GenStar
MPPT will operate with full-rated current; as indicated in each graph, maximum ambient temperature
depends on array input voltage. Actual de-rating temperatures lower than specified in the graphs
indicate insufficient airflow. Maximum charging current depends on many factors, and good
ventilation can greatly reduce the amount of de-rating. If the controller frequently reports this alarm
condition, corrective action should be taken to provide better air flow, or to move the controller to a
cooler location.
Load Short Circuit
Status LED: Flashing red. Battery status LEDs: R/G-Y
sequencing. Fully protected against load wiring short-circuits. After two (2) automatic load reconnect
attempts (10 seconds between each attempt) the GenStar MPPT will wait, and then automatically
reconnect the load, once the short is cleared.
RTS Open
The Remote Temperature Sensor is not connected to the controller. Use of the RTS is recommended
for proper battery charging.
Uncalibrated
The controller was not factory calibrated. Contact your Authorized Morningstar Dealer for service.
READYBLOCK ALARMS
A BMS, Shunt or Relay Block can trigger the following alarms on the host which will trigger a
disconnection (shutdown) of the charge controller
BMS Block Removed
- if the host is configured to use a battery that requires BMS communication
and a BMS block is not connected to the Ready Rail (BlockBus), this alarm will be present until a BMS
block is connected.
BMS Lost Communication
- if for any reason the ReadyBMS is present and communication with a
battery is lost, this alarm will be present until communication is re-established.
Shunt or Relay Block
- if the host is configured in any way to use a ReadyShunt or ReadyRelay. and
one of those blocks is not connected to the Ready Rail (BlockBus), this alarm will be present until the
required block is connected.
5.7.2 Faults
EEPROM Custom Settings Edit
Status LED: Flashing red. Battery status LEDs: R-Y-G sequencing. A value has been modified in
custom settings memory. The controller will stop charging and indicate a fault condition. After all
settings have been modified, the controller must be reset by removing and then restoring power to
the controller. The new programmed settings will be used after the power reset.
