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Check code Check code name<br />
Cause<br />
[P17] / [bb]<br />
(AI-NET)<br />
Discharge temp TD2 error 1. Outdoor unit service valve closed<br />
2. Outdoor PMV error<br />
3. TD sensor error<br />
4. Refrigerant shortage, clogging of refrigerant circuit<br />
5. 4-way valve error<br />
6. SV4 circuit leakage, misinstallation<br />
Are service valves<br />
of gas and liquid<br />
sides fully opened?<br />
No<br />
Open service valves fully.<br />
Yes<br />
Is outdoor PMV normal?<br />
1. Connector connection<br />
2. Wiring<br />
3. Coil<br />
4. Valve body<br />
5. Outdoor I/F P.C. board<br />
No<br />
Connectors: PMV1: CN300,<br />
PMV2: CN301, PMV4: CN303<br />
Repair outdoor PMV.<br />
Yes<br />
Are<br />
characteristics<br />
of TD2 sensor<br />
resistance<br />
normal?<br />
No<br />
* See “Outdoor unit temperature sensor<br />
characteristics” on “8-9. Sensor Characteristics”.<br />
Replace TD2 sensor.<br />
Yes<br />
Does discharge<br />
refrigerant gas bypass<br />
to suction side through<br />
4-way valve?<br />
Yes<br />
Check 4-way valve.<br />
No<br />
SV4 circuit<br />
1. Are SV41, SV42 and SV43<br />
valve coils installed correctly?<br />
2. Is SV42 circuit sealed<br />
correctly (no leakage)?<br />
No<br />
Correct installation of<br />
valve coil.<br />
Replace SV42 valve.<br />
Yes<br />
Are indoor units of a<br />
different refrigerant line<br />
connected?<br />
No<br />
Yes<br />
(Check it using the miswiring check<br />
function of the outdoor unit.)<br />
Correct wiring<br />
Refrigerant shortage,<br />
clogging, pipe breakage<br />
(Check there is no pipe breakage, and<br />
then recharge the refrigerant.)<br />
Check code Check code name<br />
Cause<br />
[P15] / [AE]<br />
(AI-NET)<br />
Gas leak detection<br />
TD condition (Sub-code: 02)<br />
1. Outdoor unit service valve closed<br />
2. Outdoor PMV error<br />
3. TD sensor error<br />
4. SV4 circuit error<br />
5. Refrigerant shortage, clogging refrigerant circuit<br />
Are service<br />
valves of gas<br />
and liquid sides<br />
fully opened?<br />
No<br />
Open service valves fully.<br />
Yes<br />
Is outdoor PMV normal?<br />
1. Connector connection<br />
2. Wiring<br />
3. Coil<br />
4. Valve body<br />
5. Outdoor I/F P.C. board<br />
No<br />
Connectors: PMV1: CN300,<br />
PMV2: CN301, PMV4: CN303<br />
Repair outdoor PMV.<br />
Yes<br />
Are<br />
characteristics<br />
of TD1, TD2 and TD3<br />
sensor resistance<br />
normal?<br />
No<br />
* See “Outdoor unit temperature sensor<br />
characteristics” on “8-9. Sensor Characteristics”.<br />
Replace TD1, TD2 or<br />
TD3 sensor.<br />
Yes<br />
Is SV4 valve<br />
circuit normal?<br />
(Coil misinstallation,<br />
valve leakage)<br />
Yes<br />
No<br />
Repair SV4 valve circuits.<br />
(Coil, valve body, coil installation,<br />
disconnection of cable, etc.)<br />
Are not indoor<br />
units in different<br />
refrigerant circuit<br />
connected?<br />
No<br />
Yes<br />
(Check it using the miswiring check<br />
function of the outdoor unit.)<br />
Correct wiring.<br />
Refrigerant shortage,<br />
clogging, pipe breakage.<br />
(Check there is no clogging and pipe<br />
breakage, and then recharge refrigerant.)<br />
220
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