Reason for error message:
- The Pacemaker™ HF has detected a missing phase.
- Supply voltage mains (all three phases) 400V
- Check the small fuses on the bottom of Pacemaker HF
- Check complete wiring, Are all clamps tightened?
- Measuring voltage at the input terminals on the main board (see attached picture)
- IC “OC14” or phase measurement is defective. Replace the IC, Type HCPL3700