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| Air conditioner | Edition: 10070808 | ||
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Table for Wrong Codes |
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Wrong express | reasons | Ways and means | solutions | tools |
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power timing operating |
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| indoor ambient | Check the sensor of indoor ambient |
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| temperature | temperature,if the resistance value is | see the following flow chart 1 |
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| sensor | Multimeter |
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| abnormal | 0 or ∞,the sensor is |
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| abnormal. |
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| indoor pipe | Check the sensor of indoor coilpipe |
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| temperature | see the following flow chart 1 | Multimeter |
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| ,if the resistance value is 0 or |
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| sensor |
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| ∞,the sensor is abnormal. |
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| abnormal |
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| Indoor fan | Check whether indoor PCB or motor |
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■ | □ | ★ | motor don’t | see the following flow chart 2 | Multimeter |
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is abnormal |
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| feed back |
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★ | □ | ★ | Data error or no | Check whether the EEPROM is | Change the indoor PCB | Multimeter |
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EEPROM | installed properly |
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| □on★flash■off |
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chart 1: SENSOR MALFUNCTIONS
Firstly check whether Terminal CN8 on the indoor mainboard contact well or not?
YES
Pull the sensor out of the mainboard
1)measure the value of resistance between its two jumpers 2)measure the temperature at the room temperature sensing head.
Check the specifications of the sensor to decide whether the sensor is damaged or not?
NO
The Indoor PCB is broken
chart 2 Indoor fan motor malfunction
Check whether Terminal CN2 on the indoor mainboard is well inserted or not?
NO
NO
YES
YES
YES
Pull out the terminals on the indoor mainboard and reinsert them.
Replace with new sensor
Replace with new indoor PCB
Pull out and reinsert the terminals. 
Electrify the machine again and turn it on in the Cool state with the remote controller. Measure the voltage between 1 and 4 of Terminal CN2 about
NO 
the PCB of the indoor unit is damaged and needs replacing
YES
the motor of the indoor unit is damaged and needs replacing.
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