Charger shows E13 and the display may indicate an internal temperature warning even when the unit is cold.

Safety first: Overheated power components can fail violently. Disconnect power before inspection.

• 1. Check installation: Ensure the charger is mounted vertically as specified and that vents and heatsink fins (if external) are not blocked by walls or objects.
• 2. Clean dust: With power off, gently remove dust from vents and any exposed heatsink surfaces using dry compressed air.
• 3. Allow extended cooldown: Leave the charger powered off for at least 1 hour, then restore power and test. If E13 appears immediately, the sensor is likely faulty.
• 4. Internal inspection (technician): Check that thermal pads or paste are intact between power devices and heatsink. Look for discoloration or cracking on power modules.
• 5. Replace sensor or module: Depending on the Primecom design, the temperature sensor may be integrated into the power module or mounted on the heatsink. Replace the defective component or the entire power module assembly.