Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[4-way valve inverse error]
[P19]
Is operation of 4-way valve
correct?
(Check pipe temp. and etc. in
cooling/heating operation.)
NO
Are temperature sensors
correct?
TE sensor:
CN601
TS sensor:
CN600
NO
YES
YES
NO
YES
Are resistance value of
indoor TC and TCJ
sensors correct?
Check and
replace of PMV
Replace TE sensor.
Replace TS sensor.
Replace coil
of 4-way valve.
Replace TC sensor
Replace TCJ sensor
Is the 4-way valve
coil is normal?
(Check the resistance value
of 4-way valve coil)
Does power supply to
4-way valve coil when
4-way valve is operated?
Check outdoor
P.C. board.
Check indoor P.C. board.
Defect
→
Replace
Check 4-way valve.
Defect
→
Replace
Check outdoor
P.C. board.
Defect
→
Replace
NO
YES
OK
Error
YES
NO
NO
Is refrigerant flow by
PMV correct?
YES
- 71 -