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SUPER DIGITAL

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Check<br />

code<br />

Outdoor<br />

LED display<br />

<br />

Check and troubleshooting<br />

(Item without special mention Indicates part of outdoor unit.)<br />

[P20]<br />

<br />

¡ l<br />

¡ l<br />

¡ ¥<br />

l l<br />

¡ ¥<br />

¡ ¡<br />

[High pressure protective operation]<br />

Is valve fully opened?<br />

YES<br />

Reset the power supply<br />

and then perform test run<br />

matching to the season.<br />

NO<br />

Cooling season<br />

Cooling operation<br />

Open valve fully.<br />

Heating season<br />

Heating operation<br />

Is there no problem<br />

on outdoor TL sensor?<br />

(Measurement of resistance value)<br />

YES<br />

NO<br />

Replace sensor.<br />

Is there no crack or<br />

loosening of outdoor fan?<br />

NO<br />

YES<br />

Check outdoor fan.<br />

Defect → Replace, retightening<br />

Does not the outdoor fan<br />

perform abnormal operation?<br />

NO<br />

YES<br />

Check the same items as<br />

[P22] error.<br />

Is there no element<br />

which interfere heat exchange<br />

of outdoor unit?<br />

• Clogging of heat exchanger<br />

• Short circuit<br />

YES<br />

NO<br />

Eliminate interfering element.<br />

Check overcharge of refrigerant, clogging of cycle,<br />

broken pipe, abnormal overload, etc.<br />

Defect → Correct defective position.<br />

Does indoor fan<br />

normally operate?<br />

NO<br />

Are indoor fan motor<br />

and connector normal?<br />

NO<br />

YES<br />

YES<br />

Repair defective position.<br />

Are resistance values<br />

of indoor TC and TCJ<br />

sensors normal?<br />

NO<br />

Replace<br />

sensor.<br />

Is there no element which<br />

interfere heat exchange of indoor unit?<br />

• Clogging of filter<br />

• Clogging of heat exchanger<br />

• Short circuit<br />

NO<br />

YES<br />

YES<br />

Check indoor P.C. board.<br />

Defect → Replace<br />

Eliminate interfering element.<br />

Check overcharge of refrigerant, clogging of cycle,<br />

broken pipe, abnormal overload, etc.<br />

Defect → Correct defective position.<br />

– 117 –

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