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_TROUBLE SHOOTING GUIDE BOOK _
2.5 Precautions of Replacement
2.6 Checklist after Replacement
1. Be sure to use the compressor suitable for the model
2. Be careful not to damage the pipe
3. Do not enter foreign substances into the compressor
4. Check U, V, W Color of the compressor terminals
5. Use screw only for the compressor
6. When replacing the compressor, add oil if the oil has flowed too much
7. Use only regulated oil specified in this guide
8. Vacuum over 4 ~ 5 hours
9. Perform pipe cleaning with nitrogen
10. Charging with regulated refrigerant specified in this guide
1. Check whether there is any abnormality when the cycle is stabilized at cooling or heating mode.
(Suction / Discharge superheat degree, Input current, Phase current, Pressure ratio, Oil sensor, etc.)
2. Check current Hz control according to target Hz
3. Check that the target high / low pressure
4. Check the amount of refrigerant
5. Check the abnormal noise during running
2.7 Compressor Specification
The specification of compressor being adapted to Multi V is below.
When the compressor is not working, please check the compressor referring to the below specification.
Heat Pump & Heat Recovery
Model
JQC048MAA JQC068MAA
Manufacturer
LG LG
Type
BLDC inverter Scroll BLDC inverter Scroll
Compression Volume (cm
3
/rev)
43.8 62.1
Refrigerating machine oil
FVC68D FVC68D
Weight (kg) 31 31.8
Internal diameter of inlet (mm) ID22.6 ±0.2 ID22.6 ±0.2
Internal diameter of outlet (mm) ID16.05 ±0.2 ID16.05 ±0.2
Basic PartBasic PartBasic PartBasic Part
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