Troubleshooting; Checking With Leds - Mitsubishi Electric NZ2FTGN User Manual

7.9

Troubleshooting

This section describes troubleshooting of the NZ2FT-GN.
If troubleshooting does not solve the problem, acquire the service file, and please consult your local Mitsubishi
representative. ( Page 88 Acquisition of the service file)

Checking with LEDs

When the PW LED turns off
Check the following items in order from the top.
Item
Is the module status LED of the I/O module on in green?
Is the external power supply (24VDC) wired?
Is the external power supply (24VDC) turned on?
Is the voltage of the external power supply (24VDC) within the
specified range?
If the problem still persists despite the above measures, replace the NZ2FT-GN.
When the PW LED is flashing in green
Check the following item.
Item
Is the latest firmware installed?
When the SF LED turns on in red
Check the following items in order from the top.
Item
Is the electronic unit part detached?
Is the NZ2FT-GN and I/O module connected with no clearance
between them?
When the SF LED is flashing in red
Check the following item.
Item
Has the Force mode been selected?
Action
Repair or replace the NZ2FT-GN. The possible cause is an internal fuse failure.
Wire the external power supply (24VDC).
Turn on the external power supply (24VDC).
Set the voltage of the external power supply within the range of performance
specifications.
Action
Please install the latest firmware.
Action
Insert the electronic unit part.
Connect the NZ2FT-GN and the I/O module with no clearance between them.
Action
The NZ2FT-GN is in Force mode. Clear the Force mode.
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7.9 Troubleshooting
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