67
TriStar MPPT 600V Operator’s Manual
66
Troubleshooting
WARNING: RISK OF ELECTRICAL SHOCK.
NO POWER OR ACCESSORY TERMINALS ARE ELECTRICALLY ISOLATED FROM
DC INPUT, AND MAY BE ENERGIZED WITH HAZARDOUS SOLAR VOLTAGE. UNDER
CERTAIN FAULT CONDITIONS, BATTERY COULD BECOME OVER-CHARGED. TEST
BETWEEN ALL TERMINALS AND GROUND BEFORE TOUCHING.
A
VERTISSEMENT: RISQUE DE CHOC ÉLETRIQUE
.
NON ALIMENTATION OU AUX BORNES D’ACCESSOIRES SONT ISOLÉS ÉLEC-
TRIQUEMENT DE L’ENTRÉE DE C.C ET DOIT ÊTRE ALIMENTÉS À UNE TENSION DAN-
GEREUSE SOLAIRE. SOUS CERTAINES CONDITIONS DE DÉFAILLANCE, LA BATTERIE
POURRAIT DEVENIR TROP CHARGÉE. TEST ENTRE TOUTES LES BORNES ET LA MASSE
AVANT DE TOUCHER.
WARNING: Shock Hazard
A means of disconnecting all power supply poles must be provided. These
disconnects must be incorporated in the fixed wiring. Open all power source disconnects
before removing controller wiring cover, or accessing wiring.
AVERTISSEMENT:
Risque de décharge électrique
Un moyen de déconnexion de tous les poteaux d'alimentation doit être fourni.
Ceux-ci se déconnecte doit être intégrée dans le câblage fixe. Ouvrir que toutes les source
d'énergie se déconnecte avant de retirer le couvercle de la contrôleur, ou accès au câblage.
6.1 Battery Charging and Performance Issues
Problem:
No LED indications, controller does not appear to be powered
Solution:
With a multi-meter, check the voltage at the battery terminals on the TriStar MPPT 600V. Bat-
tery voltage must be 16* vdc or greater. If the voltage on the battery terminals of the controller
is between 16 and 72 vdc, and no LEDs are lit, contact your authorized Morningstar dealer for
service. If no voltage is measured, check wiring connections, fuses, and breakers.
* Unit will power on with 10V, but 16V is required for charging to occur.
Problem:
The TriStar MPPT 600V is not charging the battery.
Solution:
C ec t e t ree
atter
C
s
t e are as in a se ence see
Section 4.4 Faults
& Alarms
of this manual to determine the cause. If a TriStar Meter 2-600V is connected, the
diagnostics menu will display reported faults and alarms.
Troubleshooting
6.0
If the LED indications are normal, check the fuses, breakers, and wiring connections in the power
source wiring. With a multi-meter, check the array voltage directly at the TriStar MPPT 600V solar
input terminals. Solar input must be greater than 100 Volts before charging will begin.
Problem:
Controller makes buzzing and humming noises.
Solution:
No action is required. This is expected due to magnetic resonance and circuit switching.
6.2 Network and Communications Issues
Problem:
Cannot connect to the controller via RS-232
Solution:
Check the following:
• The RS-232 cable is straight-through, not a Null Modem (cross-over)
• If using a serial-USB adapter, verify that the adapter software is installed and a serial COM
port has been mapped. Check the activity light on the USB adapter if it has one. If there is
no acti it t e ron C
ort as een c osen or t ere is a confi ration iss e it t e
adapter.
• The default MODBUS ID of the TriStar MPPT 600V is 1. Verify that the PC software is
confi re to co
nicate sin t e correct
Problem:
Cannot connect to the controller via EIA-485
Solution:
Check the following:
• The RS-232 port is not in use. The EIA-485 and RS-232 ports cannot be used simultane-
ously. Only one port can be used at a time.
• The RSC-1 adapter used to connect the PC to the EIA-485 network shows a green LED
and pulses red when a connection is attempted. See the RSC-1 documentation for more
information.
• Each controller or device on the EIA-485 network has been programmed with a unique
MODBUS ID.
• A serial cross-over (Null Modem) cable is used for the connection between the PC and the
Morningstar RSC-1 485 Adapter. A straight-through serial cable will not work.
• Power is supplied to the 4-wire bus on the Power/Ground lines. The bus requires voltage
in the range: 8 - 16 Vdc.
• All bus connections are secure and each terminal is wired in parallel: line A to line A, line B
to line B, etc.