1. If the indicator lamp is not on after power is connected, check whether the grounding wire is grounded correctly and the leakage circuit breaker is powered on, the emergency stop switch is connected and three air switches at the inner right side of box, two 380 V switches and one 24 V switch are connected.
2. If the heating rod does not heat, check the resistance value of the heating rod is correct. R=85Ω around. And check the overtemperature switch is cut off.
3. If the heating temperature is not controlled, check the resistance value of sensor is correct. The correct resistance value PT100=105Ω ±2Ω。（+25℃）