Hussmann Ingersoll Rand, Руководство пользователя

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Installation and Start-up 15
Observation Possible Cause Remedy
10. Pipe rattle
Inadequately supported
piping or loose pipe
connections Support pipes or check pipe
connections
Low oil charge Check oil level requirements
Faulty oil pump drive
segment Replace segment
Worn oil pump Replace bearing head assembly
11. Oil pressure lower
than normal or no oil
pressure
Worn compressor bearings Replace compressor
High suction pressure on low
temperature compressor
causes excessive amp draw If system does not have EPR valve,
throttle suction service valve until
system pulls down
High discharge pressure Check for loss of condenser water or
blocked condenser fan or coil
Incorrect overload relay Replace with correct overload relay
Defective overload relay Replace
High suction temperature Reduce suction temperature by TXV
adjustment or provide
desuperheating
Loose power or control
circuit wiring connection Check all power and control circuit
connections
Defective motor Check for motor ground or short.
Replace compressor if found.
12. Compressor motor
protectors tripping or
cycling
Faulty motor protection
device Check operation of motor protector,
replace if necessary.
Low line voltage Check line voltage and determine
location of voltage drop
Seized compressor (remove
bearing head assembly and
try to rotate crankshaft). Replace compressor
Single phasing Check voltage across all 3 legs at
contactor. Correct source of
problem.
Liquid refrigerant in cylinder Check and replace valve plates
13. Compressor
cycles on locked
rotor
On part-winding start
compressors, the second set
of windings may not be
energized a. Faulty contactor – replace
b. Faulty time-delay relay –
replace