Press the ON/OFF button to stop operation. The restart-preventing circuit is in operation for 3 minutes. increase the set temperature at heating. It is not a breakdown. Turn off the power switch immediately and consult your dealer. Take a few easy steps to try and determine the cause of the air conditioning problems. Do you feel like repairing your Mitsubishi air conditioner on your own or would you prefer to require a service engineer visit? ■ During heating mode, the vanes automatically move to the horizontal airflow direction when the airflow temperature is low or during defrosting mode. • The same symptom as on the left appears when the master unit or remote controller has a setting error. This frost is melted. Turn off the power switch immediately and consult your dealer. • The same symptom as on the left appears when the master unit (the unit to which the remote controller is connected) is not correctly wired. The compressor may hesitate resuming because a three-minute resume prevention circuit is incorporated in the outdoor unit for protection of the compressor. The operation indicator does not appear in the remote controller display. There are cases when it does not run for as long as 3 minutes. Restart is blocked for 3 minutes after you have stopped the op- eration to protect the unit. ■ Do not attempt to repair this equipment by yourself. (Airflow is reduced when the filter is dirty or clogged.). The indoor unit is composed of room air cooling or Is there a power failure or a blown fuse? ■ During defrosting mode, cool airflow may blow down and appear like a mist. ■ During central control, ‘Q” appears in the remote controller display and air conditioner operation cannot be started or stopped using the remote controller. Thank you for purchasing a MITSUBISHI HEAVY INDUSTRIES, LTD. Water or vapor is emitted from the outdoor unit. Or -551^ or higher is detected for within 20 seconds after power ON. ■ Turn on the power switch. The issue of leakage from a Mitsubishi air conditioner is one of the common problems that happen to every aircon owner. When there is no signal between the indoor PCB and outdoor PCB for 10 seconds or longer (when the power is turned on), or when there is no signal for 7 minute 35 seconds or longer (during operation) (The compressor is stopped). (PEH only), The room temperature is excessively low for cooling, excessively high for heating. Air conditioner stops without the ON/OFF button being pressed. For more complex work, ... Mitsubishi mini split AC repair. Now's the time to call a pro. If the unit is operated for a long time in high humidity, moisture may form on the air outlet grills and start dripping. Fan will not stop immediately after unit operation was stopped. After a power cut, the unit does not restart even if power has been restored. Recent Mitsubishi Heating and Cooling questions, problems & answers. It’s best to call in the services of an air conditioning specialist. Unit is waiting three minutes before restarting. During heating mode, the air conditioner stops before the set room temperature is reached. Indoor fan : Fan will not stop after 2 hours if set to CLEAN operation. • The refrigerant used in the air conditioner is safe. (5 -10 HP only), Wait for a while. (The air conditioner stops. ), Indoor unit operation was started anew during the heating and defrosting operation. (PEH only), On heating, the air flow stops although a set temperature is not reached. Draining water or motor rotation sound is heard. ■ Clean the filter. After reading, please store the Manual in a safe place and refer to it for operational questions or in the event of any irregularities. Air-Conditioner. "(§>" will appear in the remote controller display. 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