RC(U)6 Installation and Maintenance Manual - Marine Refrigeration ...
RC(U)6 Installation and Maintenance Manual - Marine Refrigeration ...
RC(U)6 Installation and Maintenance Manual - Marine Refrigeration ...
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<strong>Refrigeration</strong> Division<br />
Grasso<br />
FAULT CAUSE REMEDY<br />
A Discharge pressure too high 1. Discharge stop valve not fully open 1. Open fully<br />
2. Discharge pressure gauge defective 2. Renew<br />
3. Non condensables in system 3. Purge system with<br />
Grasso Automatic<br />
Purger<br />
B Discharge temperature too high 1. Discharge pressure too high 1. See A<br />
2. Too many cylinders cut out 2. Cut in more cylinders<br />
3. Suction pressure too low 3. See D<br />
4. Exessive superheat of suction gas 4. Eliminate exessive<br />
superheat<br />
5. Room temperature too high 5. Ventilate engine room<br />
better<br />
6. Discharge valve defective 6. Renew<br />
7. Pressure relief valve leaking 7. Renew<br />
C Suction pressure too high 1. Capacity control does not operate 1. Repair<br />
2. Compressor capacity too small 2. Consult installation<br />
engineer<br />
3. Suction pressure gauge defective 3. Repair or renew<br />
4. One or more suction valves defective 4. Repair or renew<br />
5. One or more discharge valves defective 5. Repair or renew<br />
6. Pressure relief valve is leaking 6. Renew<br />
D Suction pressure too low (suction<br />
pressure safety switch may<br />
possibly become operative)<br />
E Crankcase frosted or wet just after<br />
starting, possibly also during<br />
operation<br />
B: INSPECTION, MAINTENANCE<br />
AND TROUBLE SHOOTING<br />
1. Suction stop valve not fully open 1. Open fully<br />
2. Suction gas strainer polluted 2. Clean<br />
3. Too little refrigerant in installation 3. Top-up refrigerant<br />
4. Suction pressure gauge defective 4. Renew<br />
1. Liquid refrigerant in crankcase due to: In the case of big<br />
amount of refrigerant:<br />
stop compressor <strong>and</strong><br />
contact installation<br />
engineer<br />
1a. Room temperature too low 1a. See 1a<br />
1b. Return from oil separator mainly consists 1b. Contact installation<br />
of liquid refrigerant<br />
engineer<br />
1c. <strong>Installation</strong> operates too wet 1c. Re-adjust installation<br />
<strong>and</strong> provide for<br />
superheat<br />
1d. Liquid separator too small 1d. Contact installation<br />
engineer<br />
B1.8 <strong>Installation</strong> <strong>and</strong> <strong>Maintenance</strong> <strong>Manual</strong> <strong>RC</strong>(U)6 v001.99.01.en
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