Troubleshooting Guide; Troubleshooting And Corrective Action - Hitachi H 45MEY Service Manual

[Bold] numbers in the description below correspond to the item numbers in the parts list and exploded
assembly diagram for the Model H 45MEY, {Bold} numbers to those for the Model H 45ME, and <Bold>
numbers to the item numbers for both models.

1. Troubleshooting and corrective action

Perform troubleshooting and take a necessary corrective action according to the table below if there is a
problem that cannot be solved by the corrective action described in the handling instructions.
Problem
All the four LEDs • Broken Controller
of the display
lamp are flashing.
Three LEDs of • Mix-up of three
the display lamp
are flashing.
• Broken Controller
• Broken Rotor
Two LEDs of the • Broken Controller
display lamp are
flashing.
One LED of the • Improperly
display lamp is
flashing.
• Broken Stator
• Broken Controller
• Broken Rotor

TROUBLESHOOTING GUIDE

Cause
• No check needed.
[53]{50}.
• Check the heat-shrinkable
internal wires of
Stator Sensor PCB
Set [45]{42} and
Controller [53]{50}
• Check the state of the
[53]{50}
• Check the built-in magnet of
[102]{99}
• No check needed.
[53]{50}
• Check the plug-in state of the
connected
connector cable of
the Stator Sensor
PCB Set [45]{42}
• When the connector cable is
Sensor PCB Set
[45]{42}
• Check the plug-in state of the
[53]{50}
• Check the built-in magnet of
[102]{99}
Check
tube colors (red, black, and
white) of internal wires
connecting the Stator Sensor
PCB Set [45]{42} and
Controller [53]{50}.
Controller [53]{50}
connector.
the fan for breaks.
connector cable.
(See "Reassembly of the
power supply unit" on page
11.)
not defective
Controller [53]{50}
connector.
the fan for breaks.
-1-
Corrective action
• Replace the Controller
[53]{50} with a new one.
• Correctly connect internal
wires of the Stator
Sensor PCB Set [45]{42}
and Controller [53]{50}
by their tube colors (red,
black, and white).
• Replace the Controller
[53]{50} with a new one.
• Replace the Rotor
[102]{99} with a new
one.
• Replace the Controller
[53]{50} with a new one.
• Firmly plug the connector
cable.
• Replace the Stator
Sensor PCB Set [45]{42}
with a new one.
• Replace the Controller
[53]{50} with a new one.
• Replace the Rotor
[102]{99} with a new
one.