The following items may be the cause, so check these.
Likely Causes
A power interruption occurred and the U1 Relay Unit was reset.
The U1 Relay Unit is not self-holding because of a disconnection or poor contact between the E2' electrode and its cable.
Countermeasures
Likely Causes
A power interruption occurred and the U1 Relay Unit was reset.
The U1 Relay Unit is not self-holding because of a disconnection or poor contact between the E2' electrode and its cable.
Countermeasures
- Momentarily short the E1' and E3 terminals of the 61F-G1 Controller to operate (self-hold) the U1 Relay Unit.
- When the U1 Relay Unit will not operate (self-hold), replace the U1 Relay Unit. Also, check whether there is a damaged cable between the 61F Controller and electrode, and check whether the E2' electrode is coated with tarnish or oil.
- As an emergency measure, operation can be forced by shorting the E1' and E3 terminals on the 61F-G1 Controller, however, idling cannot be prevented in this case.
