Brand: MITSUBISHI ELECTRIC
Category: Air Conditioner
Document Type: Manual
Language: EN
Manual for JT-S1AP-W-NA
Uploaded: Nov. 21, 2025, 7:08 p.m.
Manual Publish Date: 2019-02-01
Notes for turning the power ON / OFF
- When the power is turned ON, the power light (LED 1) turns on after 1.5 seconds, and the hand dryer becomes ready for operation. Before the power light turns on, the hand dryer will not operate even if hands are inserted.
- When the power is turned OFF, the power light turns off and operation stops. The circuitry takes about 15 seconds to discharge the voltage retained in it.
- A range sensor is used as the hand detection sensor.
- When the sensor detects hands, the blower motor turns on and the hand dryer starts to operate.
- Once operation has started, it continues as long as the sensor detects hands.
- If delay time elapses without detecting hands by the sensor, the blower motor turns off and operation stops.
- The hand dryer continuously operates for up to 30 seconds.
- The motor does not start if the temperature detected by thermostats is too high or too low.
- The air speed decreases if the temperature detected by the control circuit board thermostat is 113°F (45°C) or higher.
- To regulate inrush current at startup, the heater turns on 0.5 seconds later than the blower motor.
- The heater does not turn on under specific switch settings or high temperature conditions.
Troubleshooting and error codes
| Error Display | Cause | Check Method and Remedy |
|---|---|---|
| Power light (LED 1) (The hand dryer does not operate, and the light does not light up.) | Connector disconnection | Check if the lead wire connectors between the power circuit board and the control circuit board are disconnected. |
| Blowout of the current fuse | Measure the resistance across the current fuses (FUSE 1 and 2) on the power circuit board. If the resistance is not normal, replace the power circuit board. Resistance: 0 Ω; Judgment: Normal |
|
| Malfunction of the control circuit board | If the error persists after performing the above, replace the control circuit board. | |
| Malfunction of the power circuit board | If the error persists after replacing the control circuit board, replace the power circuit board. | |
| Power light (LED 1) (The hand dryer operates, but the light does not light up.) | Malfunction of the control circuit board | Check if the connector CN201 on the control circuit board or CN100 on the power circuit board is disconnected. If a light-emitting device of the control circuit board is in a state of short circuit or open fault, the light does not light up. If the error persists after performing the above, replace the control circuit board. |
| Power light (LED 1) ☆ (Tamper-resistant timer) | 30 seconds have elapsed. | If hands are inserted in the hand drying area for 30 seconds, the error occurs. It returns to normal if hands are pulled out. |
| Dirty sensor window | Check for dirt sticking to the sensor area. If the hand dryer operates for 30 seconds because of dirt on the sensor window, remove the sensor dirt, and then reset the power. If the error persists after performing the above, replace the control circuit board. | |
| Power light (LED 1) 2 blinks (Power failure) | Connector disconnection | Check if the lead wire connectors between the power circuit board and the control circuit board are disconnected. Replace the control circuit board. |
| Malfunction of the power circuit board | Replace the power circuit board. | |
| Power supply noise | If there is power supply noise, use a noise filter for the power line or take other noise-control measures. | |
| Power light (LED 1) 3 blinks (Motor error) | Connector disconnection for the motor | Check if the lead wire connectors between the motor and the power circuit board are disconnected. Replace the blower (assembly). |
| Motor brush at the end of its life | Replace the blower (assembly). | |
| Motor lock | Check if the motor vanes are locked. Measure the resistance between the both ends of the motor lead. If it is ∞ Ω, replace the blower (assembly). | |
| Blown current fuse (FUSE 3) or blown thermal fuse of the motor | If no error is found after checking the above, replace the control circuit board. If the error persists after replacing the control circuit board, replace the power circuit board. | |
| Power light (LED 1) 4 blinks (Motor brush error) | Unusually worn-out motor brush | Replace the blower (assembly). |
| Malfunction of the control circuit board | If the error persists after performing the above, replace the control circuit board. | |
| Malfunction of the power circuit board | If the error persists after replacing the control circuit board, replace the power circuit board. | |
| Power light (LED 1) 5 blinks (Temperature detection error (Power circuit board)) | An abnormal temperature has been detected. | If the temperature on the power circuit board rises because of the overuse, the hand dryer stops the operation. Leave it until the temperature falls, and then check if the error occurs again. If the error persists after performing the above, replace the power circuit board. |
| Power light (LED 1) 6 blinks (Temperature detection error (Control circuit board)) | An abnormal temperature has been detected. | If the temperature on the control circuit board rises because of the overuse, the hand dryer stops the operation. Leave it until the temperature falls, and then check if the error occurs again. If the error persists after performing the above, replace the control circuit board. |
| Power light (LED 1) 7 blinks (Microcomputer error) | Malfunction of the control circuit board | Replace the control circuit board. |