LG RCWFH Series Instruction Manual page 138

138
Others
Decision
Status
criteria
Compressor dis-
charge temp. is -
low
Motor overload -
Abnormal vibra-
tion, current vi- -
bration
Abnormal sound
in compressor -
main body
Abnormal sound -
Moisture indica-
tor turns yellow -
during operation
Insufficient chill-
-
ing capability
leak in shaft part
capacity adjust- -
ment device
Cause
1. Intake of fluid refrigerant
1. Chilled water inlet temp. is high
2. Intake of liquid refrigerant
3. Intake of oil
4. Condenser high pressure
5. Gauge defect
1. Oil pressure is higher than specification
2. A lot of fluid refrigerant intake
3. Bearing gap is big
1. Contact of the rotating part
2. Bearing abrasion, damage
1. Noise transferred from cooling water
and chilled water pipe
2. Guide vane assembly defect
3. Isolation device defect
1. Moisture is 30ppm or more
2. Moisture indicator defect
1. Condensing pressure is high
2. Evaporating pressure is low
3. Gauge defect
1. Shaft stop bolt is not tightened
Table 66. Cause and countermeasure for chiller problems
Remedy
1. Extract adequate amount
of refrigerant
1. Adjust chilled water temp. set value
2. Extract refrigerant
3. Regenerate refrigerant
4. Refer to 6-2-1
5. Change gauge
1. Adjust to specified pressure
2. Extract refrigerant
3. Disassembly and inspection
1. Need to disassemble and repair
2. Need to disassemble and repair
1. Apply flexible join and spring isolator in
the pipes
2. Reassemble or replacement
3. Replace isolator device
1. Drain moisture in the machine
2. Replace moisture indicator
1. Refer to 6-2-1
2. Refer to 6-2-2
3. Replace gauge
1. Tighten stop bolt clockwise and check
leakage