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12 TROUBLESHOOTING
Symptoms
Controller Inoperative
No Output of Fan Control
RS485 Communication Failure
HFC6100LT Fan Controller User Manual
Table 11 Troubleshooting
Check starting battery;
Check connections of controller;
Check the DC fuse.
Check if manual mode fan output is abnormal;
Check if temp. sensor is abnormal;
Check the configuration parameters are correct.
Check connections;
Check if COM port is correct;
Check if A and B of RS485 is connected reversely;
Check if PC COM port is damaged;
120Ω resistance between RS485 and AB is Recommended.
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Possible Solutions
Page 24 of 24
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