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Error code: 1934
Pre Heater power supply abnormal error 1
Cable disconnection, breaking, blowout of a fuse, or heater failure.
Check points :
Is the cable connected properly?
Is the Sub-E Board out of order?
Is the Pre Heater out of order?
Reconnect the cable.
Replace the cable.
Replace the Sub-E Board.
Replace the Pre Heater.