Sanyo C4232, CL4232 service manual Freeze Prevention, Drain Pump Control

11. PROCESSES AND FUNCTIONS

(2)Freeze Prevention

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

unit’s fan.	FREEZE	FREEZE
	PREVENTION	PREVENTION

MORE THAN 10 MINUTES	6 MINUTES	10 MINUTES	6 MINUTES
INDOOR COIL
TEMPERATURE
30°F			(THERMO ON)

(THERMO OFF)

COMPRESSOR

ON

OFF

ON

OFF

ON

OUTDOOR FAN

ON

OFF

ON

OFF

ON

INDOOR FAN

SET SPEED

1029_X_S

Fig. 9

(3)Drain Pump Control

Drain pump operates when compressor starts to operate or when Float Switch turns off.

FLOAT SWITCH
		ON			OFF			ON
ON: low water level
OFF: high water level					20 MINUTES
COMPRESSOR
						OFF
				ON
		ON
	ON		OFF
		OFF
DRAIN PUMP						ON
	ON
OUTDOOR FAN
		OFF			OFF			ON
			ON
	ON
INDOOR FAN
				SET SPEED

0609_X_S

Fig. 10

SM830078

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