Emerson Net Safety MLP-A-SC1100, Руководство пользователя

Страница: 40 / 56

Operations Manual
January 2017 FGD-MAN-0047
30
9.3 Troubleshooting guide
Table 9-1 Troubleshooting guide
Condition Possible cause Possible solution
Intermittent power
Faulty power supply or wiring.
Voltage is below operational voltage.
Failed electronic component(s). Correct power supply or wiring.
Correct input voltage to unit.
Contact factory.
Unit not powering up
Faulty wiring or power supply.
Voltage is below operational voltage.
Blown inline fuse.
Water invasion of electronics.
Failed electronic component(s). Correct wiring and power supply.
Correct input voltage to unit.
Replace inline fuse.
Contact factory.
Contact factory.
Unit powers up without display
Loose electronic boards.
Water invasion of electronics.
Failed electronic component(s). Tightly fit electronic boards.
Contact factory.
Contact factory.
Sensor fault displays
Faulty power supply.
Faulty sensor.
Faulty sensor wiring.
Faulty junction box wiring.
Water invasion of electronics/junction box.
Failed electronic component(s). Replace or correct power supply.
Replace sensor.
Correct sensor wiring at controller.
Correct junction box wiring.
Contact factory.
Contact factory.
Unstable 4-20 mA signal
Unshielded cables used for wiring.
Water invasion of electronics.
Failed electronic component(s) Use shielded cables for wiring.
Contact factory.
Contact factory.
No 4-20 mA Output Signal
Current loop wiring is open.
Missing or incorrect placement of current output
jumper.
Current output is disabled by default for low powered
Millennium units.
Failed electronic component(s)
Close 4–20 mA signal loop.
Place current output jumper in correct position. See
Current output .
Enable 4–20 mA signal under restricted menu option.
Contact factory.