Delta MS300 Series User Manual page 625

Chapter 14 Fault CodesMS300
ID Display on LCD Keypad Fault Name Fault Descriptions
Internal communication
121
error Internal communication time-out
(CP20)
Action and Reset
Action Condition Software detection
Action Time Immediately act
Fault Treatment Parameter N/A
Reset Method N/A
Record Yes
Cause Corrective Actions
Internal communication error Contact your local distributor or Delta.
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