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[P19 error]
Is operation of 4-way valve normal?
(Check the pipe temp., etc.
during cooling/heating operation.
YES
Check outdoor temperature sensors.
TE sensor
TS sensor
Indoor TC sensor
Defective → Correct, replace
Operation check direction of the outdoor P.C. board (In case of self-preservation valve)
1) Set the Dip switch SW804 as same as the following table and push SW801 for approx. 1 second. It enables
you to check the exchange operation to cooling cycle or heating cycle.
• Only for approx. 10 seconds, the power is turned on.
• As the heat value of part (coil: resistance R700) is large, when checking the operation continuously, wait 1
minute or more until the next check. (There is no problem if a coil is not connected.)
2) After check, turn off all the Dip switches SW804.
E
x
c
h
a
n
SW804
SW801
Push
Check by tester
Analog tester: Good article if over DC180V
Digital tester: Although in some cases, the value varied and indicated. If the maximum value is DC180V or
more, it is good article.
NO
Are 1.3 to 1.6kΩ applied to
resistance value of 4-way valve coil ?
Check outdoor P.C. board operation.
(See the following description.)
g
e
o t
c
o
l o
n i
g
c
y
c
e l
CN701
1
4
DC180V or more
YES
Defective
OK
Check 4-way valve.
Defective → Replace
E
x
c
h
a
n
g
e
o t
SW804
SW801
1
Push
4
- 50 -
NO
Replace 4-way valve coil.
Check outdoor P.C. board.
Defective → Replace
h
e
t a
n i
g
c
y
c
e l
CN701
DC180V or more
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Table of Contents
Troubleshooting
