Troubleshooting - Variable fan runs at maximum

Troubleshooting - Variable fan runs at maximum

Problem
Variable fan runs at maximum

Possible Cause
Possible Solution
Incorrect wiring
Correct the wiring. 
The fuse is open or blown.Check why the fuse was blown and repair any problems. Replace the fuse. 
The variable stage is configured as OFFConfigure the variable stage for cooling. 
The idle speed setting is too low.
Increase the idle speed setting
The off at temperature setting is too high.Decrease the off at temperature setting. 
The temperature set point is above room temperature. 
Adjust the temperature set point to the desired temperature.
There is no power to the fan. 
Switch on the power. 
Faulty fan/heater 
Replace the equipment. 
Circuit breaker open
Reset the breaker.
The minimum idle speed is too high.Decrease the minimum idle speed setting.
The on full at setting is the same as the temperature set point.Adjust the temperature set point to the desired temperature. 
Incorrect motor curveConfigure the stage to use the other motor curve. 


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