FAULT CAUSE REMEDY
F Cylinders inactive while com-
pressor is operating
1. Incorrect wiring of capacity control 1. Refer to the "Engineering Data"
G Too high oil consumption 1. Type of oil not according to oil lubrication oil
table (too thin oil)
1. Change oil type
2. Compressor operates unloaded too frequently 2. Refer to design calculations
3. No return from oil separator* 3. Check the operation of float
valve in oil separator
4. Tube of pressure equalizing obstructed 4. Clean tube
5. Worn out oil scraper ring(s) 5. Replace ring(s)
6. Loss of oil due to leakage 6. Repair
7. Leaking shaft seal (max. 1 cc/hr) 7. Repair shaft seal
8. Oil level in crankcase too high 8. Refer to §B2
H Too high oil pressure during
normal operation at working
temperature
1. Lubricating oil pressure regulator not adjusted
properly or defective
1. Re-adjust or renew
2. Defective oil pressure and/or suction pressure
gauge (if present)
2. Repair or replace
J Too low lubricating oil pressure 1. Too little oil in crankcase 1. Top up oil
2. Disturbed oil circuit:
Oil suction and/or discharge filter is dirty
2. Renew the element of oil
suction filter and/or oil
discharge filter
3. Lubricating oil pressure regulator not adjusted
properly or defective
3. Re-adjust or renew
4. Liquid refrigerant in crankcase 4. See E
5. Defective oil pressure and/or suction pressure
gauge (if present)
5. Repair or renew
6. Worn bearings 6. Renew bearings
*) During the initial start-up, the oil separator (if present) consumes oil before the first oil will be returned.
Refrigeration Division
Grasso
B: INSPECTION, MAINTENANCE
AND TROUBLE SHOOTING
v001.99.01.en Installation and Maintenance Manual RC(U)6 B1.9
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