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Check code Check code name<br />
Cause<br />
[P12] / [11]<br />
(AI-NET)<br />
Indoor fan motor error 1. Wiring error of fan motor connector<br />
2. Fan motor error<br />
3. Indoor P.C. board error<br />
Turn off power supply.<br />
* Detectable in model equipped with DC fan motor<br />
(4-way cassette, 2-way cassette, 1-way cassette,<br />
concealed duct, wall and ceiling types)<br />
Is there<br />
connection error or<br />
disconnection on connector<br />
CN333, CN334 of indoor P.C.<br />
board (MCC-1402)?<br />
Yes<br />
Correct connector connection.<br />
No<br />
Remove connectors CN333 and CN334<br />
on indoor P.C. board (MCC-1402).<br />
Does fan turn<br />
without trouble when<br />
turning it with<br />
hands?<br />
No<br />
Replace indoor fan motor.<br />
Yes<br />
Is<br />
resistance value<br />
between each phase at<br />
motor side of fan motor connector<br />
CN333 on indoor P.C.<br />
board (MCC-1402)<br />
correct? *1<br />
Yes<br />
Is resistance<br />
value at motor side of fan<br />
motor connector CN334 on<br />
indoor P.C. board (MCC-<br />
1402) correct? *2<br />
Yes<br />
No<br />
*1<br />
• Is not winding 1 (Red lead) to 3 (White lead), 3 (White lead) to 5 (Black lead), 5 (Black<br />
lead) to 1 (Red lead) opened/shorted? ➝ Resistance value should satisfy the follows.<br />
[4-way Cassette type]<br />
AP007 to AP030: Approx. 70 to 100Ω<br />
AP036 to AP056: Approx. 35 to 50Ω<br />
[2-way Cassette type]<br />
AP007 to AP015: Approx. 70 to 100Ω<br />
AP018 to AP030: Approx. 30 to 70Ω<br />
AP036 to AP056: Approx. 20 to 50Ω<br />
[1-way Cassette type]<br />
Approx. 30 to 70Ω<br />
[Ceiling type]<br />
AP015 to AP027: Approx. 30 to 70Ω<br />
AP036 to AP056: Approx. 20 to 50Ω<br />
[Wall and concealed duct types]<br />
Approx. 15 to 35Ω<br />
• Is not grounded between cabinet and 1, 3, 5? ➝ Should be 10MΩ or more.<br />
No<br />
*2<br />
Check resistance value of fan motor position detective circuit.<br />
• Is not winding 1 (Yellow lead) to 4 (Pink lead)<br />
opened/shorted? ➝ Resistance should be 5 to 20kΩ.<br />
Replace indoor fan motor.<br />
Replace indoor fan motor.<br />
Is output<br />
of indoor fan motor<br />
position detective signal<br />
correct? *3<br />
Yes<br />
No<br />
*3<br />
Check fan motor position detective signal.<br />
• Measure voltage with tester between 1 and 5 of CN334 on<br />
indoor P.C. board (MCC-1402) under condition of CN333<br />
and CN334 installed and power-ON. ➝ Turn fan slowly with<br />
hands so that pin voltage fluctuates between 0 and 5V.<br />
• Between 4 and 5: 5V<br />
Replace indoor fan motor.<br />
Check indoor P.C. board<br />
(MCC-1402).<br />
Failure ➝ Replace<br />
CN333<br />
CN334<br />
Check code Check code name<br />
Cause<br />
[P10] / [0b]<br />
(AI-NET)<br />
Water overflow in an indoor unit 1. Float SW malfunction<br />
2. Drain pump malfunction<br />
3. Clogging of drain pipe<br />
4. Indoor P.C. board error<br />
Sub-code: Overflowing indoor unit's address<br />
Is float SW<br />
connector (Indoor<br />
control P.C. board<br />
CN34) connected<br />
normally?<br />
No<br />
Correct connector connection.<br />
Yes<br />
Does float SW<br />
operate?<br />
No<br />
Yes<br />
No<br />
Is wiring normal?<br />
Check and correct wiring.<br />
Yes<br />
Check indoor P.C. board.<br />
Failure ➝ Replace<br />
Does drain pump<br />
operate?<br />
No<br />
Yes<br />
Is power supply to<br />
drain pump normal?*<br />
No<br />
Check indoor P.C. board.<br />
Failure ➝ Replace<br />
Yes<br />
Check drain pipe, etc. Replace drain pump, and check cabling.<br />
* Check there is 220-240V voltage of 1-3 pin of CN68 on indoor P.C. board.<br />
218
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