E3(Fan Speed Has Been Out Of Control Diagnosis And Solu�On) - Roland FAVORITE ON-OFF Series Service Manual

5.5 E3(Fan speed has been out of control diagnosis and solu�on)
Descrip�on: When indoor fan speed keeps too low (300RPM) for certain �me, the unit will stop and the LED will display
the failure.
Recommended parts to prepare:
• Wiring mistake
• Faulty fan assembly'y faulty
• Faulty fan motor
• Faulty PCB
Troubleshoo�ng and repair:
Power off, then restart the unit a�er 2 minutes.
Does a problem remain?
Shut off the power supply, Rotate
Check the wiring of fan motor.
Measure the voltage for
the fan motor from the PCB.
Is it within normal parameters?
YES
the fan by hand.
Does it turn easily?
YES
Is it improperly wired?
YES
YES
Replace the fan motor
NO The unit is opera�ng normally
NO Find the cause of the problem and resolve it
Ensure proper connec�ons
NO Replace the indoor PCB
Page 71