Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
FILE NO.SVM-18044
-2
-
59 -
[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: GM110, 140 :
CN601 TS sensor: GM110,
140 : 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
[P20]
[High pressure protective operation]
Reset the power supply
and then make a test run.
Open service valve fully.
Check outdoor fan.
Defect
→
Replace,retightening
Is service valve
fully opened?
Is there any defect such as
loosening of nut in the outdoor fan?
Does the outdoor fan perform
abnormal operation?
Is resistance value
of
TE sensor correct?
Replace TE sensor.
Check the same items as
[P22] error.
Check overcharge of refrigerant, clogging of
cycle, broken pipe, abnormal overload, etc.
Defect
→
Correct defect.
Eliminate interfering element.
Is there anything
which interfere heat exchange
of outdoor unit?
• Clogging of heat exchanger
• Short-circuit
YES
YES
NO
NO
YES
NO
NO
YES
YES
NO