Brand: YORK
Category: Air Conditioner
Document Type: Manual
Language: EN
Manual for YUHC 18
Uploaded: April 20, 2026, 7:36 p.m.
Manual Operation: Allows control through a "manual" pad on the wind in-take grid. Modes include manual action and manual cooling. Manual cooling starts the compressor unconditionally with high-speed fans and forced swing grille. Manual action receives remote signals and operates in auto mode at 24°C with swinging grille.
Heating Mode: Four-way valve opens, defrosting closes. Compressor and outdoor fan action depend on room temperature vs. set temperature. Indoor fan actions include high/low/auto speeds and anti-cold air function, with specific conditions for fan speed based on evaporator pipe temperature and room temperature relative to setting.
Cooling Mode: Four-way valve closes. Compressor and outdoor fan action depend on room temperature vs. set temperature. Indoor fan can be set to high/low/auto. Auto fan under cooling mode adjusts speed based on indoor temperature relative to a 4°C threshold.
Dehumidifying Mode: Cooling operation with high indoor fan and low outdoor fan. Protective conditions are active.
Auto Mode: Selects heating, fan only, or cooling operation based on room and set temperatures. Protective conditions are active.
Fan Only Mode: Four-way valve, compressor, and outdoor fan are shut down. Fan speed can be high/low/auto.
Defrost (heating mode only): Conditions for defrosting (low or high temperature) are met. Defrosting action involves shutting down the four-way valve and outdoor fan, while the indoor fan operates on anti-cold air. Ending conditions include reaching a certain operating current, time, or outdoor coil temperature.
Troubleshooting and error codes
| Trouble | Cause | Solutions |
|---|---|---|
| Unit does not start | Power failure. | Wait for the comeback of power |
| Power switch is open. | Switch on the power | |
| Fuse of power switch may have blown. | Replace the fuse | |
| Batteries of remote controller are exhausted. | Replace the batteries | |
| The time is not start-up time you have set. | Wait or cancel the time set. | |
| Temperature is not set correctly. | Set the temperature properly. | |
| Door or window is open. | Close door and window. | |
| Air flowing normally with cooling(heating) effect low | Air filter is blocked with dust or dirtiness. | Clean the air filter. |
| Inlet/outlet of indoor/outdoor units are blocked. | Clear all blockages. | |
| Inlet/outlet of indoor/outdoor units are blocked. | Clear the blockage, then restart your operation. | |
| Be in 3 minutes protection of compressor | Wait |