h) ROM/RAM Error (H5)
•If a ROM/RAM error is detected, the unit shuts down, "H5" appears in the display, and the buzzer sounds.
•After replacing the failed component, the alarm resets.
•See the chart below for possible causes and remedies.
Code
H 5
Error
ROM/RAM on control board fails.
Item | Possible Cause |
Defective.
Control Board
Operation
Unit stops.
Remedy
Replace.
i) EEPROM Error (H6)
•If an EEPROM error is detected, the unit shuts down, "H6" appears in the display, and the buzzer sounds.
•After replacing the failed component, the alarm resets.
•See the chart below for possible causes and remedies.
Code
H 6
Error
EEPROM on control board fails.
Item
Control Board
Possible Cause
Defective.
Operation
Unit stops.
Remedy
Replace.
Note: See “IV.N. Removal and Replacement of Control Board or Operation Board.”
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