Toshiba RAS-B10SKVP-E, RAS-B13SKVP-E, RAS-10SAVP-E service manual Remote controller Indoor unit

	Item			Operation flow and applicable data, etc.		Description
4. Capacity			The cooling or heating capacity depending on the load is			1) The difference between set
	control		adjusted.			temperature on remote controller
			According to difference between the setup value of tempera-			(Ts) and room temperature (Ta)
						is calculated.
			ture and the room temperature, the capacity is adjusted by
			the compressor revolution.			2) According to the temperature
						difference, the correction value of
	Remote controller				Indoor unit	Hz signal which determines the
						compressor speed is set up.
		Set temp. (Ts)			Room temp. (Ta)

	3) The rotating position and speed
	of the motor are detected by the
	electromotive force occurred on
Ts –Ta	the motor winding with operation
	of the compressor.
Correction of Hz signal	4) According to the difference
	resulted from comparison of the
	correction value of Hz signal with
Detection of electromotive force	the present operation Hz, the
	inverter output and the commuta-
of compressor motor winding
	tion timing are varied.

		5) Change the compressor motor
Detection of motor speed and rotor position
		speed by outputting power to the
		compressor.
Correction value of Hz	signal £Operating Hz	* The contents of control
		operation are same in cooling
		operation and heating opera-
Inverter output change		tion
Commutation timing change
Change of compressor speed

5. Current release	This function prevents troubles on the electronic parts of the		1) The input current of the outdoor
control	compressor driving inverter.		unit is detected in the inverter
	This function also controls drive circuit of the compressor		section of the outdoor unit.
	speed so that electric power of the compressor drive circuit		2) According to the detected
	does not exceed the specified value.		outdoor temperature, the
			specified value of the current is
Outdoor unit inverter main		Outdoor temp. To	selected.
			3) Whether the current value
circuit control current
			exceeds the specified value or
		Setup of current release point	not is judged.
			4) If the current value exceeds the
			specified value, this function
		NO	reduces the compressor speed
Operating current £Setup value			and controls speed up to the
		Reduce compressor speed	closest one commanded from the
YES			indoor unit within the range which
			does not exceed the specified
Capacity control continues.		Current decrease	value.

Outdoor temp.	Cooling current	Heating current
	release value	release value
50°C < TO	6.45A
45°C < TO < 50°C		7.72A
40°C < TO < 45°C	6.75A
16°C < TO < 40°C
11°C < TO < 16°C	8.47A	9.22A
–5°C < TO < 11°C		10.80A
TO < –5°C	6.90A

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