Manual for DS-9UIDN

Manual for DS-9UIDN

Brand: DAITSU

Category: Air Conditioner

Document Type: Manual

Language: EN

Available Languages: EN , ES

Uploaded: April 20, 2026, 7:41 p.m.

Warranty Information

No warranty information is explicitly stated in the provided manual sections.

General Functions:

  1. Press ON/OFF to turn the unit on or off.
  2. Press MODE to select Auto, Cool, Dry, Fan, or Heat.
  3. Use '+' and '-' keys to select the desired temperature (not needed in AUTO mode).
  4. Press FAN to select fan speed (Auto, Low, Medium, High, Very High).
  5. Use SWING to adjust the airflow direction.

Optional Functions:

  1. Press SLEEP for night-time operation.
  2. Use TIMER ON and TIMER OFF to program the timer.
  3. Press LIGHT to turn the display light on or off (model dependent).
  4. Press TURBO to quickly increase or decrease temperature.

Special Functions:

  • X-FAN: Removes moisture from the evaporator after the unit is off to prevent mold.
  • AUTO RUN: Automatically selects the best operating mode based on room temperature.
  • TURBO: Operates at high fan speed for rapid cooling or heating.

Troubleshooting and error codes

Phenomenon Check Items Solution
Indoor unit can't receive remote controller's signal or remote controller has no action. Whether it's interfered severely (such as static electricity, stable voltage)? Pull out the plug. Reinsert the plug after about 3 min, and then turn on the unit again.
Whether remote controller is within the signal receiving range? Signal receiving range is 8m.
Whether there are obstacles? Remove obstacles.
Whether remote controller is pointing at the receiving window? Select proper angle and point the remote controller at the receiving window on indoor unit.
Is sensitivity of remote controller low; fuzzy display and no display? Check the batteries. If the power of batteries is too low, please replace them.
No display when operating remote controller? Check whether remote controller appears to be damaged. If yes, replace it.
Fluorescent lamp in room? Take the remote controller close to indoor unit. Turn off the fluoresent lamp and then try it again.
No air emitted from indoor unit Air inlet or air outlet of indoor unit is blocked? Eliminate obstacles.
Under heating mode, indoor temperature is reached to set temperature? After reaching to set temperature, indoor unit will stop blowing out air.
Heating mode is turned on just now? In order to prevent blowing out cold air, indoor unit will be started after delaying for several minutes, which is a normal phenomenon.
Air conditioner can't operate Power failure? Wait until power recovery.
Is plug loose? Reinsert the plug.
Air switch trips off or fuse is burnt out? Ask professional to replace air switch or fuse.
Wiring has malfunction? Ask professional to replace it.
Unit has restarted immediately after stopping operation? Wait for 3 min, and then turn on the unit again.
Whether the function setting for remote controller is correct? Reset the function.
Mist is emitted from indoor unit's air outlet Indoor temperature and humidity is high? Because indoor air is cooled rapidly. After a while, indoor temperature and humidity will be decrease and mist will disappear.
Set temperature can't be adjusted Unit is operating under auto mode? Temperature can't be adjusted under auto mode. Please switch the operation mode if you need to adjust temperature.
Your required temperature exceeds the set temperature range? Set temperature range: 16°C~30°C.
Cooling (heating) effect is not good. Voltage is too low? Wait until the voltage resumes normal.
Filter is dirty? Clean the filter.
Set temperature is in proper range? Adjust temperature to proper range.
Door and window are open? Close door and window.
Odours are emitted Whether there's odour source, such as furniture and cigarette, etc. Eliminate the odour source. Clean the filter.
Air conditioner operates normally suddenly Whether there's interference, such as thunder, wireless devices, etc. Disconnect power, put back power, and then turn on the unit again.
Outdoor unit has vapor Heating mode is turned on? During defrosting under heating mode, it may generate vapor, which is a normal phenomenon.
"Water flowing" noise Air conditioner is turned on or turned off just now? The noise is the sound of refrigerant flowing inside the unit, which is a normal phenomenon.
Cracking noise Air conditioner is turned on or turned off just now? This is the sound of friction caused by expansion and/or contraction of panel or other parts due to the change of temperature.
Error Code Heating indicator ON 10s OFF 0.5s Means defrosting status. It's the normal phenomenon.
E5: overcurrent protection Power indicator blinks and E5 is displayed
C5:Connector jumper malfunction Check if the connector jumper contacts the properly. If replace the PCB, please take off the old for the new PCB.
F1:Indoor ambient temp. sensor malfunction Check if indoor room temp. sensor is connected properly?
F2:Evaporator temp.sensor malfunction Check if indoor tube temp. sensor is connected properly?
H6:PC motor (indoor fan) can't run Feedback terminal of PG motor hasn't been connected firmly.
The control end of PG motor hasn't been connected firmly.
Fan blade hasn't been installed correctly and it can't run smoothly.
Motor hasn't been installed correctly and tightly.
Motor has been damaged.
Control panel has been damaged.
U8:Malfunction of zero cross detection circuit for PG motor (indoor fan) Control panel has been damaged.
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