Sanyo SAP-CMRV1426EH-F Protective Functions, Defrost Detection and Release, Non-stopdefrosting

7-2. Protective Functions

NOTE The numerical values such as temperature, frequency, time and current in parentheses are an example of SAP-CMRV3146EH and the values are different from the other models.

7-2-1. Defrost Detection and Release

(1) Non-stop defrosting

Defrosting sequence

Heating operation

Frost detection

Non-stop defrosting

4-way valve ON

Defrost detection occurs in either of the following cases:

•The temperature of the heat exchanger remains at or below the L1 line for 35 minutes after the start of HEAT operation.

•The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation.

Outdoor heat
exchanger temperature
(–20)	0	Outdoor air
	(– 6)	temperature
L2	(– 7)
	(– 24)
L1	(– 25)

•	Compressor	(80 Hz) operation (4-way valve ON)
•	Outdoor fan	OFF
•	Solenoid valve	ON
	(for hot gas bypass)
•	Indoor fan	OFF

Releasing of defrosting

•Temperature of the outdoor heat exchanger is at or above the temperature shown in the table below.

•Defrost operation has continued for 12 minutes (max. length).

Temperature of releasing

Defrost operation time	Less than 2 minutes	2 minutes or more
Heat exchanger	No releasing	14 °C or higher (*1)
temperature for
releasing defrosting

*1 The temperature for releasing of defrosting is (20 °C) or higher when the outdoor air temperature is less than 0 °C.

NOTE Defrost does not occur during HIGH POWER operation.

If other stopped indoor units are started during defrost operation, they begin operating in defrost mode.

(2) Clean defrost

If all indoor units are stopped during HEAT operation, and frost is detected at the L1 line, and the conditions for defrost are met, then defrost operation occurs, and the unit stops after defrost is completed.

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