Display Communication error between MCU

Check	Outdoor			Check and troubleshooting
code	LED display			(Item without special mention Indicates part of outdoor unit.)

[L29]			∗ There is a possibility that it is one of the following errors.
				Confirm LED on outdoor P.C. board to judge which error it is.
				Communication error between MCU, Heat sing temp. sensor (TH) error,
				EEPROM error, Unset model type, Heat sink overheat error, Gas leak detection,
				4-way valve inverse error

	<Display 1>	<Display 2>	[Communication error between MCU]
	l	¥
	¡	l
	¡	l		Check outdoor P.C. board.
	¡	¥		Check outdoor P.C. board.
	¡	¥		Defect → Replace
	l	¥		Defect → Replace


	¡	¥
	¡	¡

	<Display 1>	<Display 2>	[Heat sink temp. sensor (TH) error] → Refer to [F13] column.
	¡	¥
	¡	¥
	¡	¥
	l	l
	¡	l
	¡	¡

	<Display 1>	<Display 2>	[EEPROM error] → Refer to [F31] column.
	¡	¥
	¡	¥
	l	¥
	l	¥
	¡	¥
	¡	¡

	<Display 1>	<Display 2>	[Unset model type] → Refer to [L10] column.
	l	l
	¡	¥
	¡	l
	l	¥
	¡	l
	¡	¡

	<Display 1>	<Display 2>	[Heat sink overheat error] → Refer to [P07] column.
	¡	¥
	¡	¥
	¡	¥
	l	l
	¡	l
	¡	¡

	<Display 1>	<Display 2>	[Gas leak detection] → Refer to [P15] column.
	¡	¥
	¡	¥
	¡	¥
	l	¥
	¡	l
	¡	¡

	<Display 1>	<Display 2>	[4-way valve inverse error] → Refer to [P19] column.
	¡	¥
	¡	¥
	¡	l
	l	l
	¡	¥
	¡	¡

– 92 –

RAV-SP1104ATZG-E, RAV-SP1104ATZ-E, RAV-SP1404ATZ-E, RAV-SM804UT-E, RAV-SP1404AT-E specifications

Toshiba has long been a notable player in the air conditioning market, with a range of products designed to deliver effective cooling and heating solutions. Among its recent offerings are the RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E, RAV-SP1104ATZ-E, and RAV-SP1404ATZ-E models. Each of these models is engineered for efficiency, performance, and user convenience.

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In summary, Toshiba’s RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E, RAV-SP1104ATZ-E, and RAV-SP1404ATZ-E models reflect the brand's commitment to innovation and energy efficiency. These air conditioning solutions cater to a variety of needs while ensuring comfort, reduced environmental impact, and user-friendly operation.

Toshiba RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E Display Communication error between MCU

Models: RAV-SP1104ATZG-E RAV-SP1104ATZ-E RAV-SP1404ATZ-E RAV-SM804UT-E RAV-SP1404AT-E RAV-SP1404ATZG-E RAV-SP1104AT-E RAV-SM1104UT-E RAV-SM1404UT-E

<Display 1>

[Communication error between MCU]

RAV-SP1104ATZG-E, RAV-SP1104ATZ-E, RAV-SP1404ATZ-E, RAV-SM804UT-E, RAV-SP1404AT-E specifications