1. No Power or No Response
Possible Causes: Blown fuse, poor power interface contact, damaged input cable, main control board malfunction, loose internal cable connections, etc.
Special Note: If the main control board status indicator is not lit, check the power board, auxiliary transformer, and reactor components.
2. Display Malfunction (No Display, Screen Split, Garbled Characters)
Display backlight is on but no text: This may be due to improper brightness adjustment knob settings, a short circuit in the light pen cable, or a malfunction in the Chinese character conversion board.
Screen Split or Garbled Characters: This is usually related to poor shielding; try adding shielding paper or replacing the main control board chip.
Buttons respond but no display: Check the display cable, conversion cable, and main control board connections.
3. Output Malfunction (Open Circuit, Short Circuit, Resistance Exceeds Limit)
Displaying "Output Open Circuit" or "Resistance Exceeds Lower Limit": This is often caused by abnormal PE pipe fittings or poor connections; check and replace the fittings.
"Short Circuit" Alarm: This may be due to a short circuit in the heating element inside the electrofusion fitting, or the copper wires becoming tangled during welding, causing a decrease in resistance.
Output Open Circuit: Use a multimeter to check for circuit breaks, ensuring good electrical contact with a contact resistance not exceeding 0.01Ω.
4. Abnormal Welding Process
Welding stops before completion: Commonly caused by unstable input voltage, excessively long cables, or insufficient generator power.
Current fails to rise: This may be due to insufficient external power supply voltage or excessively long power lines causing excessive voltage drop.
Overcurrent/Overvoltage Alarms: Investigate external power supply issues and rewire.
Smoke, material spraying, or even fire during welding: This may be caused by improper fitting insertion, copper wire misalignment, or unstable welding machine output power.
5. Scanner Unable to Read Parameters
Causes include loose optical pen communication cable, damaged filter components, poor contact at the optical pen connector, or a malfunction in the optical pen itself.
6. Overheating Terminals or Cables
Aging or poor contact of the output wire copper cap is the main cause; repair or replacement of parts should be performed promptly.
7. Abnormal Welding Parameter Settings
Unable to operate according to set parameters: This may be due to a current parameter setting that is too low. It is recommended to adjust the parameters and try again.
