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SW804 SW801 CN701
Push
DC200V or more
1
4
SW804 SW801 CN701
Push
DC200V or more
1
4
Check outdoor P.C. board.
Defect → replace
Replace coil of 4-way valve.
Temperature sensor check
TE sensor CN601
TS sensor CN600
Indoor TC sensor
Defect → Correct and repair
Is the coil resistance value
of 4-way valve between
1.3kΩ and 1.6 kΩ?
Check operation of
outdoor P.C. board.
(See below.)
Does 4-way valve
work correctly?
(Check pipe temp. etc.
in cooling/heating operation.)
Check 4-way valve.
Defect → Replace
YES
YES
NO
NO
Error
OK
Check
code
[P19]
Outdoor
LED display
<Display 1> <Display 2>
¡ ¥
¡ ¥
¡
l
ll
¡ ¥
¡¡
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[4-way valve reversal error]
Check method of outdoor P.C. board operation (Self-holding valve type)
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.
• In case of operating with the coil of 4-way valve connected to CN701, take
interval over 1 minute before re-operation; otherwise it may cause overheat
of the coil.
2) After check, turn off all the Dip switch SW804.
Exchange to cooling cycle
Exchange to heating cycle
Note) Check by tester
Analog tester : Good if over DC200V
Digital tester : Good if the maximum voltage is over DC200V though
the varied voltage may be displayed.
∗ In cooling operation, [P19] error may happen when the refrigerant pressure rose
abnormally. In this case, remove the cause of pressure rising and then diagnose
the error again.
<In case of SP80>