Hoshizaki JWE-620UA-6B - Manual (Page 44)

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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.
Electrical Connection
Connected in wrong
positions. Swap two of three
wires at power switch
(GFCI) connection.
Power supply phase is reversed.
H 7
Code Error
Item Possible Case Remedy
Unit stops.
Operation