Brand: DAITSU
Category: Air Conditioner
Document Type: Manual
Language: EN
Manual for DOSM-18UUIDN
Uploaded: April 20, 2026, 8:01 p.m.
Remote Controller Introduction
The remote controller allows for operation of the air conditioner, with buttons for power, mode selection, fan speed, temperature adjustment, swing, sleep, turbo, timer, I Feel, X-Fan, and light.
Icon Display
The remote controller display shows set temperature, indoor ambient temperature, outdoor ambient temperature, fan speed, operating mode (Auto, Cool, Dry, Fan, Heat), and special functions like Turbo, Sleep, Timer, and I Feel.
Operation Introduction
ON/OFF: Turns the unit on or off.
MODE: Cycles through AUTO, COOL, DRY, FAN, and HEAT modes.
FAN: Adjusts fan speed (AUTO, Low, Medium, High).
Temperature Adjustment: Use '+' and '-' buttons to set temperature.
SWING: Controls the vertical louver angle for air direction.
SLEEP: Activates sleep mode for enhanced comfort during cooling, heating, or dry modes.
TURBO: Enables quick cooling or heating.
I FEEL: Activates the I FEEL function for temperature sensing.
TIMER: Sets ON/OFF timers for the air conditioner.
X-FAN: Operates the fan after cooling/dry mode to remove moisture.
LIGHT: Controls the display light of the indoor unit.
Combination Buttons: Features for keypad lock, Fahrenheit/Centigrade switch, and energy-saving function.
WIFI Function: For enabling and disabling WiFi connectivity.
Emergency Operation: Use of an auxiliary button on the unit in case of remote controller loss or damage.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not start | 1. Power cord is not plugged in. | 1. Plug in the power cord. |
| 2. The air switch is off. | 2. Turn on the air switch. | |
| Not enough cooling/heating | 1. Filter is dirty. | 1. Clean the filter. |
| 2. Set temperature is not correct. | 2. Adjust the set temperature. | |
| 3. Air outlet is blocked. | 3. Remove the obstruction. | |
| Unusual noise | 1. Unit is not installed properly. | 1. Reinstall the unit securely. |
| 2. Foreign object in the unit. | 2. Remove the foreign object. | |
| Water leakage | 1. Drainage pipe is blocked. | 1. Clear the drainage pipe. |
| 2. Unit is not installed level. | 2. Adjust the unit to be level. |