PT-100 Manual

Page 59
© 2017 Sensata Technologies
Operation
4.2.3 Power Status Codes
The digital display shows a P-number (P##) to indicate the status of the PV power delivered to
the battery—through the controller. Table 4-2 lists each Power Status Code and its description.
Info: If the display is auto-scrolling, the power status only shows if the power output is
being limited (P03 - P05), otherwise only the fi rst four operational displays will be seen.
If you are manually scrolling thru the display (by pressing the SELECT pushbutton), the
power status will always show after scrolling through the fi rst four operational displays.
Table 4-2, Power Status Code Descriptions

Power Maximized (MPPT is On) - the MPPT circuit in the PT controller is delivering
the maximum power from the array to the battery—there is no voltage or current
regulation occurring.

No Power Output - this PT controller has been turned off, is sleeping (during
night-time), or a shutdown fault has occurred.

Battery Voltage Regulation (Normal current regulation) - the PT controller
is regulating the current to keep the batteries at their target voltage, either in the
Absorb, Float, or Equalization charge stage.

Battery Current Regulation (Normal current regulation) - the PT controller
is regulating the output current to ensure the controller’s maximum output current
to the battery bank is not exceeded.
Info: The output current may be limited by the maximum charge rate
setting in the remote—if networked.

Power Limited (Internal High Temperature) - the temperature inside the
PT controller is high, the P03 power code will show if the output current is being
limited in an attempt to prevent the controller from shutting down.
Note: The charge status LED indicator that is active will blink during this power status.

Power Limited (Internal Frequency) - the controller includes a variable
frequency converter, the P04 power code will show if the output current is being
dialed back to prevent the frequency from going too high or too low.
Note: The charge status LED indicator that is active will blink during this power status
Info: The P04 power code can be triggered by sizing the PV array’s VOC
too close to the battery voltage. If P04 is seen often, the array wiring may
need to change to increase the PV voltage.

Power Limited (Above Voltage Regulation) - the battery voltage is above the
target voltage setpoint. Generally, this is due to an external charger charging the
battery at a higher voltage level. The P05 power code can also show when the
PT controller is limiting the output current in an attempt to prevent the battery
voltage from increasing to a voltage level that would trigger a ‘High Battery Input’
(F04) fault.
Note: The charge status LED indicator that is active will blink during this power status
Info: The P05 power code may be triggered if the battery breaker is opened
while there is a suffi cient amount of power being delivered to the battery.
Info: The P05 power code may momentarily show when the charge mode
transitions from Bulk charge to Float charge mode.