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Troubleshooting Problems in Modules Section 9-3
9-2-13 Environmental Conditions Check
Note Prevent exposure to corrosive gases, flammable gases, dust, dirt, salts, metal
dust, direct sunlight, water, oils, and chemicals.
9-3 Troubleshooting Problems in Modules
Coordinator Module Errors
Environmental Conditions Check
No
Is the ambient
temperature below
55 °C?
Is the ambient
temperature above
0 °C?
Is the ambient
humidity between 10%
and 90%?
Is noise being
controlled?
Yes
Install surge suppressor or
other noise-suppressing
equipment at noise sources.
Consider using an air
conditioner.
Consider using a heater.
Consider using a fan or air
conditioner.
No
Yes
No
Yes
No
Yes
Is atmosphere
acceptable?
Consider installing in a panel
or improving the installation
location.
No (See note.)
Yes
End
Error condition Probable cause Remedy
The Power Supply Unit’s POWER indicator is not lit. PCB short-circuited or dam-
aged.
Replace the Power Supply Unit.
The RDY indicators on the Modules do not go ON. The power supply line is faulty Replace the Power Supply Unit.
The Coordinator Module’s RUN indicator does not go
ON.
An error in program is causing a
fatal error
Correct program
The Power Supply Unit’s RUN output* does not turn
ON.
The Coordinator Module’s RUN indicator is lit.
(*CJ1W-PA205R Power Supply Unit only)
Internal circuitry of Power Sup-
ply Unit is faulty.
Replace the Power Supply Unit.
Motion Control Module does not operate or does not
operate properly.
The I/O bus is faulty. Replace the Motion Control
Module.
A particular I/O point does not operate.
Error occurs in 8-point or 16-point units.
A particular I/O point stays ON.
None of a particular Module’s I/O points will go ON.