Controllers Error Codes

LED indicator showing 1 green blink — battery is more than 0.75V below Absorption Voltage setting for 12V systems (or >1.5V below for 24V systems).

LED indicator showing 2 green blinks — battery voltage is 0.75V below Absorption Voltage setting for 12V systems (or 1.5V below for 24V systems).

LED indicator showing 3 green blinks — battery voltage is 0.5V below Absorption Voltage setting for 12V systems (or 1.0V below for 24V systems).

LED indicator showing 4 green blinks — battery voltage is 0.25V below Absorption Voltage setting for 12V systems (or 0.5V below for 24V systems).

LED indicator showing 5 green blinks — battery voltage has reached the Absorption Voltage setting.

Unit microcontroller halted from a steep battery voltage drop.

LED indicator showing blinking red — Over Temperature fault condition detected.

Battery Temperature Sensor (BTS) display showing '- - - °C' — battery electrolyte temperature is below 0°C (32°F).

DC-Load port timers for automatic On/Off are disabled. It can operate only manually.

DC-Load port timers for automatic On/Off are enabled. It can operate manually as well.

Link Master Error / Display Panel Error — the microcontroller cannot exchange data with the LCD display panel.

DC/DC Low Voltage alarm — the battery voltage has fallen below the minimum operating threshold.

Heat Sink SR Open / Low Operating Temperature alarm — the operating temperature has fallen below 0°C (32°F).

Battery is connected with the polarity reversed.

Solar panel input current is higher than 30A.

DC-Load port is drawing more than 30A of current.

Unit has Over Temperature Shutdown.

A DC-Load Disconnect occurred because the battery voltage dropped to setting threshold.

DC-Load is forced OFF (due to E05) and will turn back ON if battery voltage recovers or manually reset the controller by disconnecting/reconnecting terminal 3 briefly.

Internal Over Temperature Shutdown. Unit will auto-recover after cooling down.

Over Current alarm — the charging current exceeds 45 A, exceeding the controller's maximum current rating.

Over Temperature alarm — the controller's heat sink temperature has exceeded 90°C (194°F).

LED indicator showing solid green — battery is in Float charging stage.

LED indicator showing solid orange — battery is in Equalization charging stage.

LED indicator showing solid red — fault condition detected: Over current, low DC voltage, or operating temperature below 0°C.

The battery type selection function does not activate upon pressing the gray button.

No error detected.

Battery over-discharged.

PV over-voltage detected.

Battery over-voltage detected.

Battery under-voltage detected.

Load short circuit detected.

Load overloaded detected.

Controller over-temperature detected.

PV input over-current detected.

The solar panel voltage is too high and exceeds the charge controller’s maximum input limit of 25 VDC.

Solar panel input voltage exceeds maximum acceptable limits while battery is in overvoltage state.

The controller does not show any sign of life after connecting a battery.

The controller senses overheating conditions and is protecting the system.

The battery is over-discharged, indicating very low voltage levels or a failure in the system.

Fault in the controller.

Error on pressure transmitter Pc.

Error on Aux sensor, S5.

Error on air sensor, S2.

Error on discharge sensor, S3.

Error on suction gas sensor, S4.

Error on pressure transmitter Ps.

Temporary system alert — likely from pressing a button or entering a menu state briefly.

Alarm indicating an error or malfunction requiring troubleshooting.

The memory unit is broken.

Sensor error — sensor connection issue or malfunction.

Room temperature exceeds maximum allowed value of 99.9°C.

Refrigerating delay — system in delay state before switching to cooling mode.

Controller is in pairing mode.

Controller is charging.

Controller is powered off or the battery is depleted.

Indicates the device is powered down.

Indicates the device's battery is low.

Indicates that the device is charging.