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| Operation of diagnostic function |
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Check code |
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| Judgment and measures | ||
Indoor unit |
| Cause of operation | Status of | Condition |
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before | after |
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3 series | 4 series |
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| H03 | Current detection circuit error | Stop | Displayed when | 1. Check outdoor P.C. board | |||
| error is detected |
| (AC current detection circuit) | |||||
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H03 |
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| Open phase of |
| Displayed when | 1. | Check open phase of | |||
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| P05 | Stop | 2. | Black lead wire to be connected to CN03 of | ||||
| supply | error is detected | ||||||
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| does not pass through T611. | ||||
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| 1. | Check connection of Ps sensor connector. | |
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| Displayed when | 2. | Check failure of Ps sensor. | |
| F23 | Ps sensor error | Stop | 3. | Check compressing power error of compressor. | |||
| error is detected | |||||||
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| 4. | Check | ||
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| 5. | Check outdoor P.C. board error. | |
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| 1. | Check service valves are fully opened. | |
H06 |
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| 2. | Check clogging of outdoor PMV. (PMV1, 2) | ||
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| Displayed when | 3. | Check SV2 circuit. | |
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| H06 | Low pressure protective operation | Stop | error is detected | 4. | Check Ps sensor error. | ||
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| 5. | Check clogging of indoor filter. | |
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| 6. | Check clogging of refrigerant pipe. | |
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| 7. | Check of outdoor fan operation. (In heating mode) | |
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| 8. | Check short of refrigerant. | |
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| Discharge temp. error |
| Displayed when | 1. | Check refrigerating cycle (Gas leak) | ||
P03 | P03 | ∗ | Discharge temp. (TD) over | Stop | 2. | Trouble of electronic expansion valve | ||
error is detected | ||||||||
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| specified value was detected. |
| 3. | Check discharge temp. sensor (TD). | ||
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| 1. | Check case thermostat and connector. | |
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| Case thermostat operation |
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| 2. | Check gas leak, recharge | ||
| H04 | Stop | Displayed when | 3. | Check full open of service valve. | |||
| ∗ | Abnormal overheat of compressor | ||||||
| error is detected | |||||||
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| 4. | Check PMV (Pulse Motor Valve). | ||||
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| 5. | Check broken pipe. | |
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| 1. | Check service valves are fully opened. | |
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| (Gas side, Liquid side) | |
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| 2. | Check of outdoor fan operation. | |
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| 3. | Check motor error of outdoor fan. | |
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| Displayed when | 4. | Check clogging of outdoor PMV. (PMV1, 2) | |
| P04 | High pressure SW system error | Stop | 5. | Check clogging of heat exchanger in indoor/outdoor units. | |||
| error is detected | |||||||
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P04 |
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| 7. | Check outdoor P.C. board error. | |
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| 8. | Check fan system error (Cause of air volume drop) at | ||
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| indoor side. | |
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| 9. | Check PMV opening status in indoor unit. | |
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| P05 | Power supply voltage error | Stop | Displayed when | 1. | Check power supply voltage. AC342 to 457V | ||
| error is detected |
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| 1. | Check outdoor heat exchanger sensor (TL). | |
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| High pressure protective operation |
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| 2. | Check indoor heat exchanger sensor (TC, TCJ). | ||
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| • | During cooling operation, outdoor |
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| 3. | Check full open of service valve. | |
| P20 |
| temp. sensor (TL) detected | Stop | Displayed when | 4. | Check indoor/outdoor fan. | |
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| temperature over specified temp. | ||||||
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| error is detected | 5. | Check PMV (Pulse Motor Valve). | ||
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| 6. | Check clogging and short circuit of indoor/outdoor heat | |||
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| temp. sensor (TC, TCJ) detected |
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| temperature over specified temp. |
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| exchanger. | |
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| 7. | Overcharge of refrigerant. Recharge | |
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| 1. | Check lock of fan motor. | |
P22 | P22 | Outdoor fan system error | Stop | Displayed when | 2. Check power supply voltage between L2 and N. | |||
error is detected |
| AC198 to 264V | ||||||
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| 3. | Check outdoor P.C. board. | |
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| 1. | When performing operation while | |
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| Displayed when |
| wire, P26 error occurs. Check control P.C. board | |||
P26 | P26 | Stop |
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driving element |
| error is detected | 2. | When performing operation while | ||||
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| wire, an error does not occur. (Compressor rare short) | |
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P29 | P29 | Position detection circuit error | Stop | Displayed when | 1. | Check control P.C. board | ||
error is detected |
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– 65 –