Toshiba RAV-SM1603ATZ-E P19 error, Exchange to cooling cycle, Exchange to heating cycle

[P19 error]

Is operation of 4-way valve normal?

(Check pipe temp., etc. in cooling/heating operation.)

NO

Is the coil resistance value of

4-way valve between 1.3 and 1.6kΩ ?

YES

Check operation of outdoor P.C. board.

(See below.)

OK

Check 4-way valve.

Defect → Replace

YES

NO

Error

Temperature sensor check

TE sensor CN601 TS sensor CN600 Indoor TC sensor

Defect → Correct and repair

Replace coil of 4-way valve.

Check outdoor P.C. board.

Defect → replace

Check method of outdoor P.C. board operation (Self-hold valve type : SP110, SP140)

1)Set SW804 of Dip switch as the following figure and then push SW801 for approx. 1 second to check exchange operation to cooling cycle/heating cycle.

•Power is turned on for approx. 10 seconds.

•When checking again, check operation 1 minute or more after the first check because exothermic of part (Coil, resistance R700) is large. (There is no problem when coil is not connected.)

2)After check, turn off all the Dip switch SW804.

Exchange to cooling cycle

SW804 SW801 CN701

	4	1
	3
ON	2	Push 4
	1

Exchange to heating cycle

SW804 SW801 CN701

	4	1
	3
ON	2	Push 4
	1

DC200V or more

DC200V or more

Note) Check by tester

Analog tester : Good if over DC200V

Digital tester : Good if Max. value is over DC200V though the varied value may be displayed.

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