Hanbell ExP Series, Technical Manual, Page: 45 / 46

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PROBLEMS PROBABILITY CAUSES REMEDY / CORRECTIVE ACTION
Low suction pressure
Lack of refrigerant Check for leaks. Charge additional refrigerant.
Evaporator dirty or iced Defrost or clean coil
Clogged liquid line filter drier Replace the cartridge
Clogged suction line or compressor suction strainer Clean or change suction strainer
Expansion valve malfunctioning Check and reset for proper superheat
Condensing temperature too low Check means for regulating condensing temperature
Note: The replacement of compressor internal parts should be perform only by a qualified / certified service technician with full
knowledge of HANBELL screw compressor or it should be a Service Engineer from HANBELL.
5.4 Compressor checking list
Please fill out the compressor checking list and send it to Hanbell, if any failure of compressor happened. Hanbell will reply and
suggest the solution to resolve the failure.
CHECK LIST FOR TROUBLESHOOTING OF HANBELL SCREW COMPRESSOR
Compressor model
：
Compressor S/N
：
System design condition SCT/SST
：
Evaporator type
：
Refrigerant type
：
Liquid injection
：
□ Motor □ Chamber
Voltage
：
R-S: S-T: R-T: Over load setting
：
A
Y– Δ setting: Sec Δ – Δ setting
：
Sec
Starting current
：
A Δ current
：
A
（
end of starting
）
Operating current (full load)
：
R: S: T:
Description of problem
：
□
A
：
abnormal noise dB at % capacity
□
B
：
abnormal vibration
□
C
：
over current
□
D
：
motor burnout
□
E
：
unable to load
□
F
：
unable to unload
□
G
：
leakage
（
Photo would be a plus
）
□
H
：
accessory parts damaged
（
Photo would be a plus
）
□
I
：
other
（
Detail would be a plus
）
Suction
pressure
Discharge
pressure
Suction
temp.
Discharge
temp.
Liquid
line
temp.
Condenser water
temp.
Chiller water
temp.
Oil cooler temp. Economizer temp.
inlet outlet inlet outlet inlet outlet inlet outlet
E-mail:
sales1@hanbell.com
Fax: +886-3-4836223 Tel: +886-3-4836215