E3/Eh 03 / F5/Ec 07 (Fan Speed Outside Of The Normal Range Diagnosis And Solution) - Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual

7.4 E3/EH 03 / F5/EC 07 (Fan speed is operating outside of normal range diagnosis and
solution)
Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the LED displays the
failure code and the AC turns off.
Recommended parts to prepare:
• Connection wires
• Fan assembly
• Fan motor
• PCB
Troubleshooting and repair:
Power off, then restart the unit after 2 minutes.
Shut off the power supply,
Check the wiring of fan motor.
the fan motor from the PCB.
Is it within normal parameters?
Note: For certain models, outdoor PCB cannot be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.
Does a problem remain?
YES
rotate the fan by hand.
Does it turn easily?
YES
Is it improperly wired?
YES
Measure the voltage for
YES
Replace the fan motor
Troubleshooting

NO The unit is operating normally
NO Find the cause of the problem and resolve it
Ensure proper connections
NO Replace the main PCB
23