Troubleshooting Problems; Problems With The Display - Dometic Go Power! DURALITE 100 User Manual

FREQUENTLY ASKED QUESTIONS
Important Ensure batteries are in a well-ventilated space.
:
My voltmeter shows a different reading than the GP-PWM-30-DL display.
The meter value on the GP-PWM-30-DL display is an approximate reading intended for indication purposes only. There is an ap-
proximate 0.1 VDC inherent error present that may be accentuated when compared with readings from another voltmeter.
There may be a slight difference between the battery voltage displayed on the GP-PWM-30-DL display and the battery voltage
measured at the battery terminals. When troubleshooting using a voltmeter, check both the battery voltage at the GP-PWM-30-DL
controller terminals and battery voltage at the battery terminals. If a difference of more than 0.5 VDC is noted, this indicates a large
voltage drop possibly caused by loose connections, long wire runs, small wire gauge, faulty wiring, a faulty voltmeter or all the
above. Consult the Suggested Minimum Wire Gauge chart in Section 6 for wiring suggestions and check all connections.
For advanced users:
The GP-PWM-30-DL makes voltage measurement adjustments based on resistance it detects at the battery terminals. In addition
to resistance in the wires, batteries also have an internal resistance due to chemical properties. The controller cannot distinguish
between these two sources of resistance. It will compensate up to 250mV in the displayed value.
Why does the voltage fluctuate so much when charging with the LITHIUM setting?
Lithium batteries contain smaller battery cells. The voltages of these individual cells must be balanced during the charging process
by the Battery Management System (BMS). Imbalances will cause fluctuations in the battery voltage measurement, but this will
stabilize as the cells are charged and balanced.
Additionally, lithium batteries have higher resistance than lead acid batteries. This affects the charge controller's battery voltage
measurements and its compensation for wire resistance.
Reduce wire inductance which may also cause voltage fluctuations. Keep battery wires close together, or gently twist positive and
negative wires together.
9. TROUBLESHOOTING
How to Read this Section
Troubleshooting Problems is split into three sub-sections, grouped by symptoms involving key components. A multimeter or voltme-
ter may be required for some procedures listed.
It is imperative all electrical precautions stated in the Warning Section and outlined in the Installation Section are followed. Even if it
appears the system is not functioning, it should be treated as a fully functioning system generating live power.

9.1 PROBLEMS WITH THE DISPLAY

Display Reading: Blank
Time of Day: Daytime/Nighttime
Possible Causes:
Battery or fuse connection and/or solar panel connection (Daytime only) or battery or fuse connection (Nighttime only).
Remedy:
Check all connections from the controller to the battery including checking for correct wire polarity. Check that all connections are
clean, tight, and secure. Ensure the battery voltage is above 8 volts.
Further Steps (if required):
Check the voltage at the controller battery terminals with a voltmeter and compare with a voltage reading at the battery terminals.
If there is no voltage reading at the controller battery terminals, the problem could be a fuse, or the wiring between the battery and
the controller. If the battery voltage is lower than 8 volts the controller will not function. For the solar panel, repeat steps 1 and 2
substituting all battery terminals with solar panel terminals.
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