Checking The Leds - Mitsubishi Electric NZ2GF12A4-16D User Manual

11.3

Checking the LEDs

This section describes how to troubleshoot the system by the LEDs.
When the PW LED is on in red
Check item
Is the voltage of the module-and-sensor power supply (24VDC) within
the specified range?
Is the operating ambient temperature within the specified range?
Is the derating within the specified range?
When the PW LED does not turn on
Check item
Is any LED other than the PW LED turned on?
Is the module-and-sensor power supply (24VDC) wired?
Is the module-and-sensor power supply (24VDC) on?
Is the voltage of the module-and-sensor power supply (24VDC) within
the specified range?
When the L PW LED is on in red
Check item
Is the voltage of the load power supply (24VDC) within the specified
range?
Is the operating ambient temperature within the specified range?
Is the derating within the specified range?
When the L PW LED does not turn on
Check item
Is the load power supply (24VDC) wired?
Is the load power supply (24VDC) on?
Is the voltage of the load power supply (24VDC) within the specified
range?
When the I/O LED is on in red
Check item
Is the voltage of the load power supply (24VDC) within the specified
range?
Is the supply current to the sensor power supply or the output current
whose I/O LED is on in red within the specified range?
Is the operating ambient temperature within the specified range?
Is the derating within the specified range?
Is any input or output where the LED is on in red short-circuited?
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11.3 Checking the LEDs
Action
Set the voltage value within the range of performance specifications.
Set the operating ambient temperature within the range of performance specifications.
Set the derating within the range of performance specifications.
Action
When any LED other than the PW LED turns on, the possible cause is a hardware
failure. Please consult your local Mitsubishi representative.
Wire the module-and-sensor power supply (24VDC).
Turn on the module-and-sensor power supply (24VDC).
Set the voltage value within the range of performance specifications.
Action
Set the voltage value within the range of performance specifications.
Set the operating ambient temperature within the range of performance specifications.
Set the derating within the range of performance specifications.
Action
Wire the load power supply (24VDC).
Turn on the load power supply (24VDC).
Set the voltage value within the range of performance specifications.
Action
Set the voltage value within the range of performance specifications.
Set the current value within the range of performance specifications.
Set the operating ambient temperature within the range of performance specifications.
Set the derating within the range of performance specifications.
Check the wiring of the input or output and remove the short-circuit.