MULTI TYPE
MULTI TYPE
MULTI TYPE
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Check code Check code name<br />
Cause<br />
[P04] / [21]<br />
(AI-NET)<br />
Error concerning high-pressure<br />
SW<br />
1. High-pressure SW error<br />
2. Service valve closed<br />
3. Pd sensor error<br />
4. Indoor/outdoor fan error<br />
5. Indoor/outdoor PMV choke<br />
6. Indoor/outdoor heat exchanger clogging, air short<br />
circuit<br />
7. SV2 circuit error<br />
8. SV4 circuit error<br />
9. SV5 circuit error<br />
10. Discharge line check valve malfunction<br />
11. Refrigerant overcharge<br />
Sub-code:<br />
01: Compressor 1, 02: Compressor 2, 03: Compressor 3<br />
Note) High-pressure SW is<br />
normally closed. (B contact)<br />
Does high-pressure SW<br />
operate?<br />
No<br />
Yes<br />
Are parts of highpressure<br />
SW normal?<br />
No<br />
Check parts.<br />
Failure ➝ Replace<br />
Yes<br />
Is service valve fully<br />
opened?<br />
No<br />
Is circuit cabling<br />
normal?<br />
Yes<br />
No<br />
Check and correct<br />
cabling.<br />
Open service valve<br />
fully.<br />
Yes<br />
Reset power supply, and start a test<br />
operation corresponded to the season.<br />
Cooling ➝ To (B)<br />
Heating ➝ To (C)<br />
Are characteristics of<br />
high-pressure sensor<br />
normal?<br />
No<br />
Replace the highpressure<br />
sensor.<br />
(B) Cooling operation<br />
Does cooling outdoor<br />
fan normally operate?<br />
No<br />
Is there any crack or<br />
coming-off of fan?<br />
No<br />
Repair faulty parts.<br />
Yes<br />
Yes<br />
Connector connection, fan<br />
IPDU, fan motor, wiring<br />
Is outdoor PMV normal?<br />
1. Connector connection<br />
2. Cabling<br />
3. Coil<br />
4. Valve body<br />
5. Outdoor I/F P.C. board<br />
No<br />
Yes<br />
Connectors: PMV1: CN300,<br />
PMV2: CN301, PMV4: CN303<br />
Repair outdoor PMV.<br />
Is there any<br />
interference of heatexchanging<br />
of outdoor unit?<br />
1. Heat exchanger clogging<br />
2. Air short circuit<br />
Yes<br />
Eliminate the<br />
interference.<br />
No<br />
(A)<br />
Check A3-IPDU P.C. board.<br />
Failure ➝ replace<br />
Check code Check code name<br />
Cause<br />
[P03] / [1E]<br />
(AI-NET)<br />
Discharge temp TD1 error<br />
1. Service valve of outdoor unit closed<br />
2. Outdoor PMV error<br />
3. TD sensor error<br />
4. Refrigerant shortage, clogging of refrigerant piping<br />
5. 4-way valve error<br />
6. SV4 circuit leakage, misinstallation<br />
Are service<br />
valve of gas and liquid<br />
sides fully opened?<br />
No<br />
Open service valve 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, PMV2: CN301, PMV4: CN303<br />
Repair outdoor PMV.<br />
Yes<br />
Are<br />
characteristics of<br />
TD1 sensor resistance<br />
normal?<br />
Yes<br />
No<br />
* See “Outdoor unit temperature sensor<br />
characteristics” on “8-9. Sensor Characteristics”.<br />
Replace TD1 sensor.<br />
Does<br />
discharged refrigerant<br />
gas leak to suction side<br />
through 4-way<br />
valve?<br />
Yes<br />
Check 4-way valve.<br />
No<br />
SV4 circuit<br />
1. Are SV41, SV42 and<br />
SV43 valve coils<br />
installed correctly?<br />
2. Is SV41 circuit sealed<br />
correctly (no leakage)?<br />
No<br />
Correct installation of valve<br />
coil.<br />
Replace SV41 valve.<br />
Yes<br />
Are indoor units of a<br />
different refrigerant line<br />
connected?<br />
Yes<br />
(Check it using the miswiring check<br />
function of the outdoor unit.)<br />
Correct wiring<br />
No<br />
Refrigerant shortage,<br />
clogging, pipe breakage<br />
(Check there is no pipe breakage, and<br />
then recharge the refrigerant.)<br />
216
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