ā 179 ā
No
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No
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No
[P17]
Check code CauseCheck code name
Discharge temp TD2 error
1. Outdoor unit service valve closed
2. Outdoor PMV error, 3. TD sensor error
4. Refrigerant shortage, clogging of refrigerant circuit
5. 4-way valve error, 6. SV4 circuit leakage, misinstallation
7. SV5 circuit leakage
8. SV6 circuit clogging
9. Incorrect piping of discharge gas / suction gas pipes
10. Cooling/Heating FS unit error
Are
service valves
of gas and liquid sides
fully
opened?
Open service valves fully.
Repair outdoor PMV.
Replace TD2 sensor.
Check 4-way valve.
Correct installation of
valve coil.
Replace SV42 valve.
Correct wiring
Refrigerant shortage,
clogging, pipe breakage
Are indoor units of a
different refrigerant line
connected?
Are
characteristics
of TD2 sensor
resistance
normal?
Does
discharge
refrigerant gas bypass to
suction side through
4-way
valve?
Connectors: PMV1: CN300,
PMV2: CN301, PMV4: CN303
(Check it using the miswiring check
function of the outdoor unit.)
(Check there is no pipe breakage, and
then recharge the refrigerant.)
Is outdoor PMV normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
SV4 circuit
1. Are SV41, SV42 and SV43
valve coils installed correctly?
2. Is SV42 circuit sealed
correctly (no leakage)?
Ye s
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Ye s
Ye s
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Ye s
Ye s
Ye s
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* See "Outdoor unit temperature sensor
characteristics" on "9-9. Sensor Characteristics".
Replace defective parts.
SV5
circuit leakage check
Replace defective parts.
SV6
circuit clogging check
Correct piping to normal
piping.
Check
incorrect piping of discharge
gas/suction gas
main pipes
Repair Cooling/Heating
FS unit.
Is
Cooling/Heating FS
unit normal?
[P17]
Check code CauseCheck code name
Discharge temperature TD3 error
1. Outdoor unit service valve closed
2. Outdoor PMV1, 2 error
3. TD sensor error
4. Refrigerant shortage, clogging inside of pipe
5. 4-way valve error
6. SV4 circuit leakage, misinstallation
7. SV5 circuit clogging
8. SV6 circuit clogging
9. Incorrect piping of discharge gas/suction gas pipe
10. Cooling/Heating FS unit error
Are
service valves of outdoor
unit discharge gas pipe, suction
gas pipe, liquid pipe
fully opened?
Are
outdoor PMV, 1. Connector connection
2. Wiring, 3. Coil, 4. Valve body,
5. Outdoor P.C. board normal?
Is
resistance characteristics
of TD3 sensor
normal?
Wasn't
discharge gas bypass to
suction side by
4-way valve?
SV5
circuit leakage
check
SV6
circuit clogging
check
Check
incorrect piping of discharge
gas/suction gas
main pipes.
Is
Cooling/Heating
FS unit
normal?
Isn't
an indoor unit of different
refrigerant line
connected?
ā
Connectors: PMV1: CN300
PMV2: CN301
PMV4: CN303
No
No
No
No
No
No
No
No
No
No
Ye s
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Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Open service valves fully.
Repair outdoor PMV.
Replace TD3 sensor.
4-way valve check
Correct instllation of valve coil.
Replace SV43 valve.
Replace defective parts.
Replace defective parts.
Correct piping as standard.
Repair Cooling/Heating
FS unit
Correct wiring as standard.
* See "Outdoor unit temperature sensor
characteristics" on "9-9. Sensor Characteristics".
They are refrigerant shortage,
clogging and pipe breakage.
(That is, confirm there is no pipe breakage
and then recharge refrigerant.)
SV4 circuit
1. Are SV41, SV42 and SV43
valve coils installed correctly?
2. Is SV42 circuit sealed
correctly (no leakage)?
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