12
WARNING
Unless otherwise specified, perform the following steps after
turning the power switch OFF and disconnecting the AC plug.
Checking the electrical continuity of the
cord assembly
1. Remove the plug of the cord assembly from the
station.
2. If the handle (for gun configuration) is attached,
remove it.
3. Remove the nozzle cartridge. For this removal, see
“Attaching and replacing the nozzle cartridge.”
4. Remove the screws for the grip and measure the
resistance between the socket terminal and the plug
pin as shown below (refer to the wiring diagram).
Plug pin 1
̶̶̶̶̶
Red (socket) 3
Plug pin 2
̶̶̶̶̶
Green (socket) 1
Plug pin 3
̶̶̶̶̶
Black (socket) 2
Plug pin 4
̶̶̶̶̶
Brown (LED circuit board)
Plug pin 5
̶̶̶̶̶
White (thermistor)
Plug pin 6
̶̶̶̶̶
Blue (switch circuit board)
If the resistance is larger than 0
Ω
or
∞
in any location,
replace the cord assembly.
1. Measure the resistance between plug pin 2 and the
nozzle end.
2. If the resistance value exceeds 2
Ω
(at room
temperature), perform the maintenance for the nozzle,
which is described in page 12 of the instruction
manual for the FM-202. If this does not decrease
the value, check the electrical continuity of the cord
assembly.
Checking for electrical continuity of heater/
sensor
Measure the resistance at room temperature (59 to 77°F ; 15
to 25°C). The normal range is 7.5
Ω
± 10%. If the resistance
is outside this range, replace the nozzle assembly.
Measure the resistance between this
point and the heater/sensor.
Check the nozzle (heater/
sensor) and connecting cable.
Checking the cord assembly
Checking the grounding line
Checking the heater/sensor
1
4
7
2
8
5
6
3
Plug
Socket
White
Black
Red
Green
2
3
1 Thermistor
Switch circuit board
Blue
LED circuit board
Brown
White
