279
CHAPTER 11 TROUBLESHOOTING
11
11.
4 Check
s Using
LE
Ds
11.4
Checks Using LEDs
This section describes how to troubleshoot the system using the LEDs.
(1) The PW LED has turned off
Check the following items.
(2) The RUN LED has turned off
Check the following item.
If the RUN LED does not turn on even after the above-mentioned action has been taken, the possible cause is a
module failure. Please consult your local Mitsubishi representative.
(3) The MODE LED flashes
Check the following item.
(4) The MODE LED has turned off
Check the following item.
Check item
Action
LEDs other than the PW LED is on.
When LEDs other than the PW LED is on, the possible cause is a hardware failure.
Please consult your local Mitsubishi representative.
The module power supply (24VDC) is not wired.
Wire the module power supply (24VDC).
The module power supply (24VDC) is off.
Turn on the module power supply (24VDC).
The voltage of the module power supply (24VDC) is out of the
specified range.
Set the voltage value within the range of performance specifications.
Check item
Action
The voltage of the module power supply (24VDC) is out of the
specified range.
Check that the voltage of the module power supply (external power supply) is within the
range of performance specifications. (
After the check, turn on the module power supply.
Check item
Action
The temperature control module is in execution of the unit test.
When the temperature control module is in execution of the unit test, the D LINK LED
turns on after the unit test is completed. Take actions according to the result of the unit
test.
(
Check item
Action
The MODE LED does not turn on even after the module power
supply has been turned on.
The possible cause is a hardware failure. Please consult your local Mitsubishi
representative.
Содержание NZ2GF2B-60TCRT4
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