j) Phase Reversal Error (H7)
•If a phase reversal error is detected, the unit shuts down, "H7" appears in the display, and the buzzer sounds.
•After correcting the connection, the alarm resets.
•See the chart below for possible causes and remedies.
Code
H 7
Error
Power supply phase is reversed.
Item
Electrical Connection
Possible Case
Connected in wrong positions.
Operation
Unit stops.
Remedy
Swap two of three wires at power switch (GFCI) connection.
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