Hakko Electronics FR-400 - Connection Cord Breakage Inspection

1
4
8
2
6
5
7
3
■ Checking the connection
cord for breakage
■ Checking the grounding
line
Checking the connection cord for breakage
1. Unplug the connection cord from the station.
2. Disassemble the heating element. (Please
refer to “Replacing the heating element
(heating core)”)
3. Measure the resistance values between the
connector and the lead wires at the socket as
follows. (Please refer to the wiring diagram
on the left.)
Pin 1････････････Red (Socket) (1)
Pin 2････････････Green (Grounding line) (5)*
Pin 3････････････Black (Switch board) (2)
Pin 5････････････Yellow (Switch board) (3)
Pin 6････････････Purple (Switch board) (4)
Pin 8････････････Brown (Socket) (1)
If any value exceeds 0 Ω or is ∞, replace the
connection cord.
* For information on the plug 2, refer to
“■ Checking the grounding line”.
1. Measure the resistance value between Pin 2
and the nozzle.
2. If the value exceeds 2 Ω (at room tempera-
ture), perform the nozzle maintenance. If the
value still does not decrease, check the
connection cord for breakage.
29
Black
Switch board
Grounding
line
Socket
Green
Brown
Red
Yellow
Purple
(1)
(2)
(3)
(4)
(5)
8. CHECKING PROCEDURE (continued)
9. ERROR MESSAGE
30
● Sensor Error
● Grip Error
● Low Temp Error
● Heater Short Error
● FATAL Error
EXAMPLE:
350℃ (400℃ - 50℃)
OR
650℉ (750℉ -100℉)
Settemperature
Settemperature
Low-temperaturealarmtolerance
Low-temperaturealarmtolerance
EXAMPLE:
Assume that the temperature setting is 400℃/750℉ and the
tolerance 50℃/100℉. If the temperature continues to decrease
and finally falls below the value indicated while the heating
element is on, "Low Temp Error" is displayed.
When there is the possibility that a failure has occurred in the
sensor or heater (including the sensor circuit), "Sensor Error" is
displayed and the power is shut down.
"Grip Error" will be displayed if the connector cord is not attached
to the station OR the wrong handpiece is connected.
If the sensor temperature falls below the difference between the
current temperature setting and the low-temperature alarm
tolerance, "Low Temp Error" is displayed and the warning buzzer
sounds. When the nozzle temperature rises to a value within the
set tolerance, the buzzer will stop sounding.
"Heater Short Error" will flash, and the buzzer will sound
continuously, when a heater that cannot be used with this
product is inserted or a foreign object has found its way
into the connector.
This is displayed when the system is unable to operate normally.
Should this error be displayed, please contact your HAKKO
representative.