Tools required: Always on cooling fan.
The cooling fan is meant to start as soon as the machine is turned on. If the fan does not start, it indicates that there is an issue.
There can be 2 possible reasons if the fan is not working.
1. Fan is spoilt.
2. The fan is not getting a power supply.
To check if the fan is spoiled: Using the multimeter, check the power supply at the JST pin where the fan gets connected. If there is a 24V supply present, then the fan is spoiled. If there is no correct power output at the connector, you need to check the MKS and the wiring.
To check the wiring:
1. Using the Multimeter, check if the 24V output port in the MKS is supplying the required current. If the MKS 24V output is working fine, but the carriage board 24V output for the fan is not giving the correct power output, you need to check the connectivity between the MKS and the carriage board. If the connectivity is fine, then the carriage board or JST pin can be the issue.
To check connectivity, refer to the article on checking connectivity.
