Corrective Action When The Orange Led Blinks - Hitachi NR 1890DC Service Manual

2. Corrective action when the orange LED blinks

No. Orange LED lighting pattern
1 Power switch is automatically turned off after
about 10 seconds.
2
Power switch is automatically turned off after
blinking 5 times (about 5 seconds).
3
Power switch is automatically turned off after
blinking 6 times (about 6 seconds).
4
Power switch is automatically turned off after
blinking 7 to 8 times (about 7 to 8 seconds).
Power switch is automatically turned off after
5
about 9 seconds.
6
Power switch is automatically turned off after
blinking 10 times (about 10 seconds).
1
Power ON*
Does the orange
2
LED* blink?
Yes
Reset the error.
(See page 7.)
3
Pull the trigger.*
Does the
motor run?
Yes
Does the
piston move?
Yes
• Reversed magnet polarity
• Sensor (C) failure or
• Failure of one-way clutch
• Idle by broken gear
• Broken wiring
• Lock by broken gear
• Lock by worn-out piston
• Lock by broken piston
• Broken wiring
• Excessively charged
• Deformed or broken
• Moving parts are out of
• Broken wiring
No
No
See No. 3 and 6 in the table.
No
See No. 4 in the table.
See No. 1, 2, and 5 in the table.
Possible cause
of position detector
disconnection
in gear box
rack
bumper
compressed air
moving parts
grease.
*1: Do not press the pushing lever and/or
pull the trigger during the process of
turning the power switch ON. Doing so
will prevent the power switch from
turning ON.
*2: LED of battery indicator
*3: Press the pushing lever against the
wood before pulling the trigger.
-6-
Corrective action
• Replace defective parts.
• Replace defective parts.
• Replace defective parts.
• Replace defective parts.
• Replace defective parts.
• Move the piston down to the
bottom dead point. Discharge
the compressed air. Use the
reduction valve set to feed
compressed air again.
• Replace moving parts.
• Lubricate the moving parts
with grease.
• Replace defective parts.