E3/F5 - Kaisai FLY INVERTER Series Service Manual

5.5 E3/F5 (Fan speed is operating outside of the normal range)
Description: When the indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will
display the failure(E3). When the outdoor fan speed registers below 200RPM or over 1500RPM for an extended period of
time, the unit will stop and the LED will display the failure(F5).
Recommended parts to prepare:
• Wiring mistake
• Faulty fan assembly
• Faulty fan motor
• Faulty PCB
Troubleshooting and repair:
Power off, then restart the unit after 2 minutes.
Shut off the power supply, Rotate
Does it turn easily?
Check the wiring of fan motor.
Is it improperly wired?
Measure the voltage for
the fan motor from the PCB.
Is it within normal parameters?
Replace the fan motor
Page 76
YES
the fan by hand.
YES
YES
The unit is operating normally
Find the cause of the problem and resolve it
NO
PCB