Hitachi DH 40MEY Service Manual page 3

Problem
• Improperly
• Internal wires
No LED of the
display lamp is ON.
• Broken Controller
• Broken LED
• Broken Filter PCB
• Internal wires
The LEDs of the
display lamp light,
• Broken Controller
but the motor does
not run.
• Broken Switch
Cause
• Check the plug-in state of the
connected connector cable.
connector cable of (See "Reassembly of the
the Panel [112] power supply unit" on page
PCB 12.)
• Check the plug-in state of the
loosely plugged internal wires.
into the Controller (See "Reassembly of the
Set [49] and Filter power supply unit" on page
PCB Set [58] 12.)
• When the Controller Set [49]
Set [49] connector is not defective
• When the internal wire is not
defective
• When the connector cable is
not defective
• When the internal wire is not
Set [58] defective
• Check the plug-in state of
loosely connected internal wires to the Switch
to the Switch [63] [63]. (See "Reassembly of
the power supply unit" on
page 12.)
• When internal wires of the
Set [49] Controller Set [49] are not
defective
• When internal wires of the
[63] Controller Set [49] are not
defective
Check
-2-
Corrective action
• Firmly plug the
connector cable.
• Firmly plug the internal
wires into the Controller
Set [49] and Filter PCB
Set [58].
• Replace the Controller
Set [49] with a new
one.
• Replace the Panel [112]
with a new one.
• Replace the Filter PCB
Set [58] with a new
one.
• Firmly connect all
internal wires to the
Switch [63].
• Replace the Controller
Set [49] with a new
one.
• Replace the Switch [63]
with a new one.