Toshiba RAS-B13GKVP-E Operation flow and applicable data, etc, Description, Remote controller

	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
		of compressor motor winding			inverter output and the commuta-
					tion timing are varied.
	Detection of motor speed and rotor position				5) Change the compressor motor
					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
		Inverter output change			operation
		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
			Setup of current release point		exceeds the specified value or
					not is judged.
					4) If the current value exceeds the
Operating current ≤			High		specified value, this function
					reduces the compressor speed
			Reduce compressor speed
Setup value					and controls speed up to the
Low					closest one commanded from the
				Current decrease	indoor unit within the range
					which does not exceed the
Capacity control continues.
					specified value.

Outdoor temp.		Cooling current	Heating current
		release value	release value
45˚C		6.45A
40˚C	44˚C	6.75A	7.72A
16˚C	39˚C
11˚C	15.5˚C	8.47A
	10.5˚C		9.22A
			10.80A

– 31 –