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11
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Error Display
Cause
Check Method and Remedy
Power
Heater
LOW
HIGH
Check 1
Check 2
(The hand dryer operates,
but no lamps light up.)
Tilted or fallen
LED
Make sure that the LEDs on the display circuit board (JT-33D) are
upright.
Malfunction of
the display circuit
board (JT-33D)
Check if the connector CN8 on the display circuit board (JT-33D)
or CN7 on the control circuit board (JT-33M) is disconnected.
If the connector is not disconnected, replace the display circuit
board (JT-33D).
(If a light-emitting device of the display circuit board (JT-33D) is in
a state of short circuit or open fault, the lamps do not light up.)
Malfunction of
the control circuit
board (JT-33M)
If the error persists after performing the above, replace the control
circuit board (JT-33M).
Power
Heater
LOW
HIGH
Check 1
Check 2
(Tamper-proof timer)
40 seconds have
elapsed.
If hands are inserted in the hand drying area for 40 seconds, the
error occurs.
It returns to normal if hands are pulled out.
Remaining foreign
object
Dirty sensor
window
Check for any objects left in the water receiver area, or any dirt
sticking to the sensor area.
If the hand dryer operates for 40 seconds due to remaining foreign
object or dirt on the sensor window, it automatically adjusts the
sensor sensitivity after it has stopped, and the error display goes
off.
After removing the foreign objects or sensor dirt, reset the power
(to set the sensor sensitivity again).
Dirty sensor
window
Dirt may shield the sensor.
Wipe the dirt off the sensor window.
Malfunction of
the control circuit
board (JT-33M)
If the error persists after performing the above, replace the control
circuit board (JT-33M).
Power
Heater
LOW
HIGH
Check 1
Check 2
(Power failure)
Connector discon-
nection
Check if the lead wire connectors between the power circuit board
(JT-33P) and the control circuit board (JT-33M) are disconnected.
Malfunction of
the control circuit
board (JT-33M)
Replace the control circuit board (JT-33M).
Malfunction of
the power circuit
board (JT-33P)
Replace the power circuit board (JT-33P)
Power supply
noise
If there is power supply noise, use a noise filter for the power line
or take other noise-control measures.
Is the connector on the display
circuit board (JT-33D) or the one
on the control circuit board (JT-
33M) securely connected?
