Controllers Error Codes
18 error codes across 2 brands. Find your code, what it means, and how to fix it.
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15 codesLED 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.
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).
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).
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.