Brand: MITSUBISHI ELECTRIC
Category: Other
Document Type: Manual
Language: EN
Manual for JT-SB116JH-G-NA
Uploaded: Nov. 21, 2025, 7:15 p.m.
Manual Publish Date: 2023-06-01
Warranty Information
Refer to the manufacturer or service agent for repair work, as it must be performed by qualified personnel.
- Circuit Breaker ON/OFF: Power, heater, and blue illumination lamps turn on after 1.5 seconds. Initial settings are performed by the microcomputer. Do not insert hands until the power lamp is on. If the circuit breaker is turned ON again 30-120 seconds after being turned OFF, operation may take 3 seconds to enable. When the circuit breaker is turned OFF, operation stops and circuitry takes 50 seconds to discharge voltage.
- Hand Detection and Operation: Infrared sensors (upper, middle, lower) detect hands. Blower motor starts when lower or middle sensors detect hands. Operation continues as long as hands are detected. Stops after 1.5-3 seconds of no detection or after 30 seconds of continuous operation.
- Heater Control: Heater turns ON with blower motor. Does not turn ON if heater switch is OFF or if ambient temperature reaches 89.6°F (32°C) or higher.
- Blue Illumination Lamps: Can be turned OFF by switching the air speed six times within 5 seconds while the power is ON and the motor is stopped. Can be turned ON by repeating the same procedure.
Troubleshooting and error codes
| Error Mode Display | Checkpoint | Check Method and Remedy | |
|---|---|---|---|
| Power ● |
(Fuse is blown) | Power supply voltage | Check that the circuit breaker is turned ON and that approx. 120 V AC is supplied at both ends of the power cord connections on the terminal block. If 120 V AC is not supplied, check the power cord connection. |
| Power supply voltage on the power circuit board (JT-34P1H) | Check that approx. 120 V AC is supplied between TAB1 and TAB2 (orange) on the power circuit board (JT-34P1H). If not supplied, check the power cord connection. | ||
| Power supply voltage on the filter circuit board (JT-34F) | Check that approx. 120 V AC is supplied between TAB20 and TAB21 (red), then between TAB22 and TAB23 (orange). If not supplied, replace the filter circuit board (JT-34F). | ||
| Connector disconnection for the display circuit board (JT-30S5) | Check if connector CN19 (JT-30S5) or CN18 (control circuit board) is disconnected. | ||
| Power ● |
Malfunction of the control circuit board (JT-30M4/JT-30M4A) | If no error is found, replace the control circuit board. | |
| Malfunction of the power circuit board (JT-34P1H) | If the hand dryer does not operate after replacing the control circuit board, replace the power circuit board (JT-34P1H). | ||
| Power ● Heater ● |
Remaining foreign object | Check for objects left over and shielding the sensor in the hand drying area. | |
| Power ☆ or Heater ● |
Dirty sensor window | Wipe the dirt off the sensor window. | |
| Power ● Heater ● |
Connector disconnection for the sensors | Check if connectors CN12 (JT-30S3), CN15 (JT-30S2), CN11 (JT-30S1), CN7/CN8 (control circuit board) are disconnected. | |
| Malfunction of the control circuit board (JT-30M4/JT-30M4A) | If no error is found, replace the control circuit board. | ||
| Power ● Heater ● |
Abnormal power supply voltage | Check correct power supply voltage. Error occurs if approx. 170 V AC or over, or 60 V AC or under. If over 170 V AC, fuse on power circuit board may blow. | |
| Malfunction of the power circuit board (JT-34P1H) | If no error is found, replace the power circuit board (JT-34P1H). | ||
| Power ☆ Heater ☆ |
Motor malfunction | Check if the motor is locked and turns smoothly by hand. | |
| Malfunction of the power circuit board (JT-34P1H) | If no error is found, replace the power circuit board (JT-34P1H). | ||
| Blower (assembly) malfunction | If error persists after replacing power circuit board, replace blower (assembly). Check causes of motor overload. | ||
| Power ☆ Heater ☆ |
Connector disconnection for the motor | Check if motor lead wire connectors (black, white, red) are disconnected. | |
| Blown thermal fuse of the motor | Measure resistance between Red/White and Red/Black. If ∞, replace blower (assembly). | ||
| Power ● Heater ☆ |
Malfunction of the power circuit board (JT-34P1H) | If no error is found, replace the power circuit board (JT-34P1H). | |
| Power ● Heater ☆ |
Connector disconnection | Check if connector CN5 (control circuit board) or CN2 (power circuit board) is disconnected. | |
| Malfunction of the power circuit board (JT-34P1H) | If no error is found, replace the power circuit board (JT-34P1H). | ||
| Power ● Heater * |
Malfunction of the control circuit board (JT-30M4/JT-30M4A) | Replace the control circuit board. |