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 | DOCUMENT 1025 | |
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 | REV. B | |
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 | Instruction Manual | 
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 | 858 LED Series | 
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 | Sizes 1, 2, 3, 4 and 5 | 
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| PROBLEM | POSSIBLE CAUSE | CORRECTIVE ACTION | 
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 | MODULE(s) (See Sec 10.10) | 
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| (P.10) Upon | Incorrect LED Power Supply | Verify/Set Power Supply | 
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| applying power, | Circuit Board Switch | Board Switches and jumpers | 
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| sign | Configuration | are set according to Table 1 | 
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| momentarily | 
 | (Ferro CCR) or Table 2 (Series | 
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| lights and then | 
 | CCR) | 
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| turns off. | 
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| (P.11) Upon | LED MODULE Voltage has | Replace any LED | 
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| applying power, | dropped 25% below the calibrated | MODULE(s) with  | 
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| sign | output voltage (See Table 12). | LEDs and  | 
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| momentarily | 
 | Power Supply. (See Sections | 
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| lights and then | 
 | 10.10 & 10.11) | 
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| turns off. | 
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| (P.12) Upon | LED MODULE Voltage is greater | Verify/Set Power Supply | 
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| applying power, | than 125% of the expected | Board Switches and jumpers | 
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| sign | calibrated output voltage (See | are set according to Table 1 | 
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| momentarily | Table 12). | (Ferro CCR) or Table 2 (Series | 
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| lights and then | 
 | CCR) | 
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| turns off. | 
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| (P.13) Sign | Incorrect LED Power Supply | Verify/Set Jumpers JP1 and | 
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| flickering | Circuit Board Jumper Setting. | JP2 according to the Table 1 | 
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 | (FERRO CCR) or Table 2 | 
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 | (Series CCR) | 
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| (P.14) Sign | Incorrect Isolation Transformer | Replace with Isolation | 
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| flickering | 
 | transformer that matches sign | 
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 | type, size, #modules. (See | 
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 | Tables  | 
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