Sanyo TH3642 / CH3642, XH3642 / CH3642, XH4242 / CH4242, XH2442 / CH2442 Freeze Prevention Cooling

2. Processes and functions

2-5 Freeze Prevention (Cooling)

Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the efficiency of the unit, and frost build up on the coil blocks cool air circulation from the indoor unit's fan.

MIN. VALUE OF
EITHER E1 OR E2
INDOOR UNIT
TEMP.	34
	33
	32
	31		CONTINUOUS
(°F)			DETECTION
			FOR 2 MINUTES
ELECTRONIC REF.
CONTROL		OPEN	OPEN
VALVE SIGNAL
COMPRESSOR		ON	MINIMUM 3	ON
			MINUTES
				1925_THS_I

Fig. 8

Note: Freeze prevention is controlled by the temperature at the indoor heat exchanger coil as sensed by either sensor E1 (located at the entrance of the coil) or sensor E2 (located on the middle of the coil). Freeze prevention cycle is controlled by the lower temperature sensed at either of the two sensors.

Chart Explanations and notes

❑This chart shows when the electronic refrigerant control valve opens to regulate the temperature of the indoor unit coil to prevent freezing.

❑If the refrigerant control is not effective and the temperature continues to drop and stays below 31°F for 2 minutes continuously, the control circuit stops the compressor. The compressor does not start again until the temperature rises above 34°F.

The compressor stops for 3 minutes minimum.

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SM830082

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