To Next PageTo Next PageWhy is my Mitsubishi Heavy Industries Air Conditioner not cooling or heating properly?
Poor cooling or heating can occur if the air filter is clogged. Check the air filter. Also, make sure that there are no obstacles blocking the air inlet and outlet grill. Direct daylight coming into the room or too many people in the room can also be the cause. If the swing louver is horizontal during heating, adjust it.
What to do if my Mitsubishi Heavy Industries FDUM Air Conditioner cannot start immediately after stopping?
If your air conditioning system doesn't restart immediately after being turned off, it's likely that a circuit protecting the compressor has been activated. Wait for 3 minutes before trying to operate the unit again.
What to do if my Mitsubishi Heavy Industries FDUM Air Conditioner unit does not work at all?
Immediately turn off the power supply switch and contact your dealer.
What to do if my Mitsubishi Heavy Industries FDUM doesn't work at all?
If the Mitsubishi Heavy Industries Air Conditioner unit isn't working, check the following: ensure the power supply switch is turned on, check for a blackout or blown fuse, and verify the leakage breaker isn't activated. Also, check if sunlight or strong illumination is striking the receive unit (wireless unit).
How to fix the Mitsubishi Heavy Industries FDUM when it displays "(PREPARATION OF HEATING)"?
When "(PREPARATION OF HEATING)" is displayed on your Mitsubishi Heavy Industries Air Conditioner, this indicates that the unit is preventing cool air from blowing out. Please wait for a while; the operation will automatically switch to the normal heating operation. Also, after defrosting is complete, the operation automatically switches back to the normal operation.
Why does the swing louver move without any operation in my Mitsubishi Heavy Industries Air Conditioner?
The swing louver automatically swings twice when the power supply switch is turned on. This is not a trouble.
General| Category | Air Conditioner |
|---|---|
| Manufacturer | Mitsubishi Heavy Industries |
| Series | FDUM Series |
| Type | Concealed Ceiling Unit |
| Refrigerant | R410A |
| Power Supply | 220-240V, 50Hz, 1Ph |
| Operating Temperature Range (Cooling) | 15 - 46 °C (depending on the specific model) |
| Operating Temperature Range (Heating) | -15°C to 24°C |
| Airflow (Indoor Unit) | 700-1800 m³/h |
