How to fix PowerTech Controller charging LED when it is OFF during the daytime?
If the charging LED is off on your PowerTech Controller during the day, even when sunlight is properly hitting the PV array, it could be due to an open-circuit in the PV array. Check the PV array connections to ensure they are correct and tight.
What to do if PowerTech MP3749 Controller battery frame and fault icon blink?
If the PowerTech Controller's battery frame and fault icon are blinking, it could be due to several reasons. First, the battery voltage might be too high. Verify if the battery voltage exceeds the OVD (over voltage disconnect voltage), and if it does, disconnect the PV array connection. Second, the battery might be over-discharged; in this case, the load will recover when the battery voltage reaches or exceeds the LVR (low voltage reconnect voltage). Third, the battery might be overheating; the controller will resume functioning once the battery temperature drops to 55°C or below.
General| Brand | PowerTech |
|---|---|
| Model | MP3749 |
| Category | Controller |
| Language | English |
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