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Troubleshooting |
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FILM/DEPOSIT |
DESCRIPTION OR
IDENTIFICATION |
CAUSE (1) |
REMOVAL |
PREVENTION |
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Protein |
Blue-rainbow blue varnish like "applesauce" |
1. Using non-chlorinated cleaner
2. Inadequate pre-rinse
3. Improper (sporadic or periodic) cleaning
4. Improper initial cleanup |
Initial cleanup - equal parts chlorine, chlorinated alkaline detergent, hot water. |
1. Chlorinated alkaline detergent
2. Proper cleaning with proper use-dilution after each usage
3. Adequate pre-rinse
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Milkstone or waterstone |
White to yellow |
1. Mineral from milk
2. Mineral from water |
1. Initial cleaning
2. Acid wash with phosphoric acid |
1. Regular and proper cleaning procedures coupled with acidified rinse.
2. Waterstone deposits may require special acids for removal - contact Universal representative. |
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Fat or grease |
Hanging water droplets
Greasy (white) appearance
Oil |
1. Same as protein
2. Low temp or improper detergent concentration
3. Regular use of acids in washing
4. Pulsator oil on equipment surface |
Initial cleanup |
Regular and proper cleaning procedures coupled with acidified rinse |
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Mineral (calcium magnesium) |
White (waterstone)
Chalky to gray |
1. Improper rinsing
2. Dropout of minerals from water supply
3. No acidified rinse
4. Non-compatible alkaline detergent
5. Failure to use acid detergents |
Acid wash |
1. Acid rinse
2. Product used has good water conditioning properties
3. Water softener or treatment |
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Iron |
Red to brown or black |
1. Water supply
2. Aggressive supply-iron from system components
3. Improper procedures |
Acid wash |
1. Regular effective acid rinse
2. Water treatment
3. Proper selection of sanitizers | |
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