15
Error display : e56
[Power transistor thermistor faulty.] (Only case of 151~251 type)
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| Outdoor unit |
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| Red LED |
| Stays OFF | Red LED |
| 1 time flash |
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| Green LED |
| Keeps flashing |
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| Defective outdoor unit control | ||||||
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| YES | power transistor | YES |
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power transistor thermistor | thermistor characteristics |
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connector connection |
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| broken wire? |
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| NO |
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| NO |
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| characteristics of power |
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| transistor thermistor |
Repair | Defective power transistor | °C] | 100 |
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thermistor | Replacement |
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| 80 |
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| 80 |
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| T< 80°C |
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| T> 80°C | )[T | |
● Display conditions |
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| resistance | 50 |
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| 5 | resistance | |
If the temperature sensed by the thermistor is |
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tinuously for 5 seconds between 10 minutes and 10 minutes 20 | Thermistor | 0 |
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seconds after the compressor goes ON, the compressor stops. Af- |
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ter a 3 minute delay, the compressor restarts. If this state is de- |
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tected 3 times in 40 minutes. |
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| 0 | 20 | 50 | 80 | 100 | 120 |
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| Temperature [T] (°C) |
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16
| Error display : | e57 | [Insufficient refrigerant volume.] | ||||
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| Indoor unit |
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| Red LED |
| Stays OFF | Red LED |
| 1 time flash | |
| Green LED |
| Keeps flashing | Green LED |
| Keeps flashing | |
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Is the service valve
opened fully?
YES
Are the
connections of the connectors
to the indoor heat exchanger and return
air thermistor OK?
YES
Are the
characteristics of the indoor heat exchanger and return air thermistor OK?
YES
Is the low pressure during
operation normal?
NO
Fully opened.
NO
Normal
NO | Indoor heat exchanger and | ||
| return air thermistor faulty | ||
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| Replace |
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NO
Charge with refrigerant.
Return air thermistor
Indoor unit heat exchanger thermistor
Resistance temperature characterisics
(kΩ) | 15 |
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Resistance |
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| 5kΩ at 25° | C | ||
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0 10 20 30 40 50 Temperature (°C)
YES
Indoor control PCB faulty Replace
(The indoor heat exchanger and return air thermistor input circuits are faulty.)
●Display conditions
If insufficient refrigerant protection (See page 92) is implemented 3 times within 30 minutes.
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