Coil heating control | Toshiba RAV-SM1404UT-E, RAV-SM1104UT-E

4.Coil heating control

1)This control function heats the compressor by turning on the stopped compressor instead of a case heater. It purposes to prevent stagnation of the refrigerant inside of the compressor.

2)As usual, turn on power of the compressor for the specified time before a test run after installation; otherwise a trouble of the compressor may be caused.

As same as a test run, it is recommended to turn on power of the compressor beforehand when starting operation after power of the compressor has been interrupted and left as it is for a long time.

3)A judgment for electricity is performed by TD and TO sensors.

If TO sensor is defective, a backup control is automatically performed by TE sensor. For a case of defective TO sensor, judge it with outdoor LED display.

4)For every model, the power is turned off when TD is 30°C or more.

TO 18˚C

15˚C

•Power-ON

condition TD<30˚C 10˚C

8˚C

	(Normal time)	TE
		TE
		20˚C
	No power
	Intermittent power-ON	18˚C
	Intermittent power-ON	• Power-ON
	10 minutes: ON /	condition
	5 minutes: OFF	TD < 30˚C 12˚C
	Output
	[40W or equivalent]	10˚C
	Continuous power-ON	10˚C
	Continuous power-ON
	Output
	[40W or equivalent]

(In defective TO sensor)

No power

Intermittent power-ON 10 minutes: ON /

5 minutes: OFF Output

[40W or equivalent]

Continuous power-ON Output

[40W or equivalent]

REQUIREMENT

While heating the coil, the power sound may be heard. However it is not a trouble.

5.Short intermittent operation preventive control

1)For 3 to 10 minutes after operation start, in some cases, the compressor does not stop to protect the compressor even if receiving the thermostat-OFF signal from indoor. However it is not abnormal status. (The operation continuance differs according to the operation status.)

2)When the operation stops by the remote controller, the operation does not continue.

6.Current release control

No. of revolutions of the compressor is controlled by AC current value detected by T620 on the outdoor P.C. board so that the input current of the inverter does not exceed the specified value.

Current [A]

Frequency down

Hold

I1–1.0

Normal operation

Objective model	SP110 / SP140

	COOL	HEAT
	COOL	HEAT

11 value [A]	20.0	20.0

– 63 –

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-SM1404UT-E Coil heating control, Short intermittent operation preventive control

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