Sanyo TH4242 / CH4242, XH3642 / CH3642 11 4-Way Valve, Solenoid Control, Normal Control Mode

2. Processes and functions

2-11 4-Way Valve, Solenoid Control

The basic function of the 4-way valve is to direct the refrigerant in the correct direction according to the Operation Mode (COOLING or HEATING) selected.

The following two charts show conditions of the controls and functions listed in the left hand column when the solenoid is ON or OFF. Chart (A) on this page shows the relationships when the temperature control is in NORMAL mode, and Chart (B) on the next page shows the relationships when the remote controller is set to AUTO mode.

(A) Normal Control Mode

2

POWER SOURCE OFF ON

OPERATION			ON	OFF			ON
BUTTON
MODE	COOL				COOL
BUTTON HEAT			HEAT				HEAT
				2
			3 MINUTES		TURN ON	THERMO OFF		THERMO OFF
				TURN OFF			THERMO		THERMO
							ON		ON
COMPRESSOR			ON	OFF	ON	OFF	ON	OFF	ON
						2		2
			1		1		1		1
SOLENOID COIL		OFF	ON		OFF			ON
(4-WAY VALVE)
		1. . . More than 5 minutes			2. . . More than 3 minutes				0443_M_S

Fig. 15

Chart Summary and Explanations

❑For the first 3 minutes after power is applied, the 4–way valve remains OFF and the compressor will not operate, even if the ON button is pushed.

❑If the 4–way valve is turned OFF with the compressor operating, the air conditioner operates in COOLING mode. See Table below.

❑If the 4–way valve is turned ON with the compressor operating, the air conditioner operates in HEATING mode. See Table below.

Operation Mode	4-way valve	Compressor
	solenoid
COOLING	OFF	ON
HEATING	ON

SM830082

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