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9. Troubleshooting
Work precautions
• When servicing, recreate the malfunction two or three times before starting repairs.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the earth leakage
breaker when no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force
to the surface mounted parts.
• When removing the circuit board, be careful of the metal edges on the board.
• When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull
on the lead wires.
• When circuit board failure is considered to be a cause, check closely for any broken section on the copper
foil patterns, burning or discoloration of parts.
• After replacing a circuit board, make sure to restore the same settings as before the replacement.
Description of the error display
LOW lamp
(LED 3)
HIGH lamp
(LED 4)
Heater lamp
(LED 2)
: ON
: OFF
Troubles with error display
Error Display
(The hand dryer does not
operate, and no lamps light
up.)
Check lamp 2
(LED 6)
Check lamp 1
(LED 5)
Power lamp
(LED 1)
: Slow blinking (ON for 0.4 seconds/ OFF for 0.4 seconds)
Cause
Connector discon-
Check if the lead wire connectors between the power circuit board
nection
(JT-33P) and the control circuit board (JT-33M) are disconnected.
Blowout of the
Measure the resistance across the current fuses (FUSE 1 and 2)
current fuse
on the power circuit board (JT-33P). If the resistance is not nor-
mal, replace the power circuit board (JT-33P).
Resistance Judgment
Malfunction of the
To check the power switch operation ON/OFF, measure the resist-
power switch
ance between TAB1 on the power circuit board (JT-33P) and the
blue lead connector of the terminal block (indicated by
between TAB2 and the brown lead connector (indicated by
If the resistance is not normal, replace the switch.
Malfunction of
If the error persists after performing the above, replace the control
the control circuit
circuit board (JT-33M).
board (JT-33M)
Malfunction of
If the error persists after replacing the control circuit board (JT-
the power circuit
33M), replace the power circuit board (JT-33P).
board (JT-33P)
Check Method and Remedy
0 Ω
Normal
─ 10 ─
), and
Switch Resistance Judgment
ON state
0 Ω
Normal
OFF state
∞ Ω
Normal
).
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