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Mitsubishi Electric JT-SB216JSH-W-E Handbook page 17

Hand dryer
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Error Mode Display
Power
Heater/Check
( Motor signal error)
Power
Heater/Check
(Microcomputer error)
Troubles without error display
Symptom
Warm air does not blow.
( JT-SB216JSH-W/H/S-E)
The hand dryer operates
by itself.
The hand dryer does not
stop operation.
Air speed switch does not
change the air volume.
( JT-SB216JSH-W/H/S-E)
Checkpoint
Connector discon-
Check if the connector CN5 on the control circuit board (JT-30M3/
nection
JT-30M2) or CN2 on the power circuit board (JT-30P3H/JT-30P3)
is disconnected.
Malfunction of
If no error is found after checking the above, replace the power
the power circuit
circuit board (JT-30P3H/JT-30P3).
board (JT-30P3H/
JT-30P3)
Malfunction of
Replace the control circuit board (JT-30M3/JT-30M2).
the control circuit
board (JT-30M3/
JT-30M2)
Cause
Heater switch
Check if the heater switch is turned ON.
(Heater lamp lights with the heater switch ON.)
Connector dis-
Check if the connectors TAB3 and TAB4 on the power circuit board
connection for the
(JT-30P3H) are disconnected.
heater
Blown thermal
Measure the resistance between the connectors TAB3 and TAB4
fuse of the heater
on the power circuit board (JT-30P3H).
At a heater temperature of 0°C or over: 100 Ω or under
If the fuse is blown, the resistance will be ∞ Ω.
In this case, replace the heater (PTC) and the power circuit board
(JT-30P3H).
Malfunction of
Check if approx. 220 to 240 V AC is output at both ends of the con-
the power circuit
nectors TAB3 and TAB4 on the power circuit board (JT-30P3H). If it
board (JT-30P3H)
is not output, replace the power circuit board (JT-30P3H).
*Note: Approx. 220 to 240 V AC is output during operation, and it is
Heater malfunc-
If no error is found after checking the above, replace the heater
tion
(PTC).
Connector dis-
Check if the following connectors are disconnected.
connection for the
1 Sensor circuit board (lower) (JT-30S3) connector CN12
sensors
2 Sensor circuit board (middle) (JT-30S2) (2 locations) connectors
CN15
3 Light receiving circuit board (JT-30S1) connector CN11
4 Control circuit board (JT-30M3/JT-30M2) connectors CN7 and
CN8
Malfunction of
Visually check the sensor circuit boards for a defect such as a
the sensor cir-
crack, corrosion, or a cold solder joint.
cuit boards (JT-
If the error persists after replacing the control circuit board (JT-
30S1/2/3)
30M3/JT-30M2) in the next procedure, replace the defective sensor
circuit boards (JT-30S1/2/3).
Malfunction of
If no error is found after checking the above, replace the control
the control circuit
circuit board (JT-30M3/JT-30M2).
board (JT-30M3/
JT-30M2)
Connector discon-
Check if the connector CN21 on the control circuit board (JT-30M3)
nection
or CN4 on the power circuit board (JT-30P3H) is disconnected.
Malfunction of
If no error is found after checking the above, replace the power
the power circuit
circuit board (JT-30P3H).
board (JT-30P3H)
Check Method and Remedy
Check Method and Remedy
not output during standby.
─ 17 ─

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