GIWEE R32 - Page 35

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5.4.3 E6 (IDU) Zero-crossing detection fault
Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero
crossing signal time interval is abnormal.
Possible reason:
 Wrong connection
 Faulty PCB
Troubleshooting and repair:
a) Check the wire connections one by one according to wiring diagram.
b) Check power supply.
c) Change a new indoor unit PCB.
5.4.4 E7 (IDU) EEPROM error
Description: Indoor PCB main chip does not receive feedback from EEPROM chip.
Possible reason:
 Faulty indoor unit PCB
Troubleshooting and repair:
a) Cut off the power supply and then repower on the unit after 3 minutes.
b) If the error still occurs, change a new PCB.
5.4.5 E8 (IDU) PG fan motor stall protection
Description: When the indoor fan speed is below 300rpm or over 2100rpm for 50s,the unit will stop
and show E8 error.
Possible reason:
 Wrong wires connection
 Faulty fan assembly
 Faulty fan motor
 Faulty PCB
Troubleshooting and repair:
a) Cut off the power supply and then repower on the unit after 3 minutes. If it still has problem, go
to next step.
b) Cut off the power supply and rotate the fan blade by hand. If it can’t rotate smoothly, check if
there is any block. Otherwise, go to next step.
c) Check the wiring of fan motor.
d) Measure the voltage of fan motor from PCB. If the parameters are normal, replace a new fan
motor. If not, replace indoor unit PCB.
Note: