EP ADDITIONAL MESSAGES

DESCRIPTION - TM-5-3895-374-24-2_416

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 EP ADDITIONAL MESSAGES DIAGNOSTIC MESSAGES POSSIBLE CAUSE SOLUTION - Voltage on Terminals 5 or 6 - Check field wiring to at an improper time Terminal 5 and 6 - High Electrical Noise - Check for proper ground on power supply - Install noise suppressor on power supply - Re-route scanner wires away from high voltage wiring - Fuel Changeover on Burners - Interrupt power when with Direct Spark Oil changing fuels - Install time delay relay - Note write-up on page 15 of this bulletin - Failed Programmer - Replace Programmer - Worn Chassis - Replace Chassis Scanner signal has been detected during the shutter closed time. This LOCKOUT CHECK SCANNER can be caused by a faulty UV tube (4-314-1), faulty scanner (45UV5), or lack of power to the scanner. BEFORE INSTALLING THE CONTROL CAUTION: Ensure that electric power is shut off. If either a ground or a short circuit is detected, it must be eliminated before the control is plugged into the wiring base and power turned on. Test the electrical field wiring for short circuits and grounds. The recommended method requires the use of an ohmmeter set on its lowest resistance scale. Note: When using ultra-violet or infra-red scanning, be sure to remove any jumpers on the wiring base which ground the S2 Terminal. 1. Touch the meter probes together and calibrate accurately to ensure a reliable test 2. Disconnect the neutral wire (L2) from the control system at the power source. Clip one meter test lead to the grounded green terminal on the lower right side of the wiring base and with the other probe touch each other terminal. At no time should the meters show continuity or read 0 ohms. 3. Reconnect the neutral wire (L2) at the power source. Remove the lest probe from the grounded terminal and reconnect it to Terminal L2 in the wiring base. With the other probe, touch each other terminal. It is normal to obtain a resistance reading on the meter at some terminals during this test as there are resistive loads (coils, transformers, lamps, etc.) connected whose normal DC resis- tance may be less than 5 ohms. However, at no time should the test meter read zero ohms. CAUTION: Restore power for the following test. 1. With Flame-Monitor removed, measure voltage from L2 to all other terminals. Reading should be zero on all terminals except L1. FLAME SAFEGUARD (page 3 - 1051)

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