Mitsubishi Electric Jet Towel JT-SB216JSH-H-E, Handbook

Page: 17 / 59

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