Troubleshooting; Checking With Leds - Mitsubishi Electric NZ2FTGN User Manual

8.9

Troubleshooting

This section describes troubleshooting of the NZ2FT-BT.
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

This section describes troubleshooting with LEDs of the NZ2FT-BT. ( Page 132 Part Names)
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?
When the SF LED turns on in red
Check the following items in order from the top.
Item
Is the electronic unit part detached?
Are the NZ2FT-BT and I/O module connected
with no clearance between them?
Is the station number set to one that does not
match the network configuration setting of the
software package?
Is the station number set outside the effective
range (0 or 65 or higher)?
Has the rotary switch changed during operation?
When the SF LED is flashing in red
Check the following item.
Item
Has the Force mode been selected?
8 NZ2FT-BT
162
8.9 Troubleshooting
Action
If it is on in green, repair or replace the NZ2FT-BT. 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
Insert the electronic unit part.
Connect the NZ2FT-BT and the I/O module with no clearance between them.
Set the station number to one that matches the network configuration setting.
Set the station number within the effective range (1 to 64).
Restore the rotary switch setting to its original setting.
Action
The NZ2FT-BT is in Force mode. Clear the Force mode.