Hitachi UX Twin Nozzle - Page 276

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6.2.21a Pump Motor1 Fault
(*1): When you replace Pump1 motor, refer to “4.8.4 Motor replacement”.
(*2): When you replace EZJ133 board, refer to [Replacement procedures of EZJ133 board] in “3.3.1 EZJ133
board (MPU board)”.
[Caution]
Be sure to check that there is no wrong connection of harnesses by referring to [Connector numbers and
Identifying method of harnesses] in “3.3.20 Electrical Connection Diagram”.
Does the fault recur?
Pump Motor1 Fault
Pull out and insert the connector
・ CN13 of the EZJ133 board
・ CN1 and CN4 of the EZJ138 board
・ pump motor
connector.
Replace the EZJ133 board. *2
Resume the
operation.
Replace the pump motor1. *1
Does the fault recur?
Yes
No
Yes
No
Does the connection
harness have electrical
continuity?
Replace the connection harness
Does the fault recur?
Yes
No
Yes
No