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October 2019
24VDC Power Hub 2500 Operator Manual
Solar Charge Controller Error Codes
Detailed error codes can be read with a LCD user interface.
The vast majority of these errors will
not be encountered when the Power Hub is operating in concert with other HPS components. All
possible error codes are included for reference purposes.
Err 2 - Battery voltage too high
This error will auto-reset after the battery voltage has dropped. This error can be due to other
charging equipment connected to the battery or a fault in the solar charge controller.
This error can
also occur if the battery voltage is set to a lower voltage than the actual battery voltage (e.g., 12
VDC for a 24 VDC battery).
Err 3, Err 4 - Remote temperature sensor failure
Check if the T-sense connector is properly connected to a remote temperature sensor. Most likely
cause: the remote T-sense connector is connected to the BAT+ or BAT- terminal. This error will auto-
reset after proper connection.
Err 5 - Remote temperature sensor failure (connection lost)
Check if the T-sense connector is properly connected to a remote temperature sensor. This error will
not auto-reset.
Err 6, Err 7 - Remote battery voltage sense failure
Check if the V-sense connector is properly connected to the battery terminals. Most likely cause:
the remote V-sense connector is connected in reverse polarity to the BAT+ or BAT- terminals.
Err 8 - Remote battery voltage sense failure (connection lost)
Check if the V-sense connector is properly connected to the battery terminals.
Err 17 - Controller overheated despite reduced output current
This error will auto-reset after the solar charge controller has cooled down. Check the ambient
temperature and check for obstructions in the ventilation filters. Shade the Power Hub.
Err 18 - Controller over-current
This error will auto-reset. If the error does not auto-reset disconnect the solar charge controller
from all power-sources, wait 3 minutes, and power up again. If the error persists the solar charge
controller is probably faulty. A cause for this error can be switching on a very large load on the
battery side.
Err 20 - Maximum Bulk-time exceeded
This error can only occur when the maximum bulk-time protection is active. This error will not auto-
reset. This error is generated when the battery-absorption-voltage is not reached after 10 hours of
charging.
Note: This protection is default disabled in all solar charge controllers. Do not enable it.
