Measure during initial startup

• Perform AUTOCAL.
• Check transformer specifications.

Fault Area 7:

Explanation: U_R signal incorrect

Possible cause: Secondary voltage U2 outside of permissible range of 0.4…120 VAC.

Fault Area 8:

Explanation: I_R signal incorrect

Possible cause: Current I₂ outside of permissible range of 30…500 A.

Fault Area 8:

Explanation: Turns incorrectly passed through current transformer

Possible cause: Check number of turns: Two or more turns required for currents < 30 A.

Measure during operation, HBAbbreviation HB not changed

Fault Area 4:

Explanation: Partial bypass (delta R)

Possible cause: Heating element partially bypassed by conducting part, e.g. clamp, opposite heat-sealing bar.

Fault Area 5:

Explanation: Parallel circuit interrupted

Possible cause:

• Wire break, heating element break.
• Contact to heating element is defective.

Fault Area 6:

Explanation: Total bypass

Possible cause:

• Heating element incorrectly installed, no insulation at heat-sealing bar ends or insulation incorrectly installed.
• Heating element completely bypassed by conducting part.