48 Specifications subject to change without notice. 38MGR-04SM
DIAGNOSIS AND SOLUTION (CONT)
PFC module protection error diagnosis and solution (E6)
Troubleshooting
ERROR CODE E6
MALFUNCTION DECISION
CONDITIONS
When the voltage signal that PFC sends to main control board is abnormal, the display LED displays
“E6” and the AC turns off.
SUPPOSED CAUSES
• Wiring mistake
• Outdoor PCB faulty
• Inductance of PFC module faulty
• PFC module malfunction
PFC Module Protection
Check whether the
connecting line between the
main board and the PFC
module is well connected.
Yes
Check if the voltage range
of P-N on the IPM module
is normal?
DC277-356V for 18-24KBtu/h;
DC277-410V for 36KBtu/h.
No
Yes
Replace the inductance.
No
Connect it tight.
Check if normal or not.
Replace the outdoor main board.
Yes
Yes
No
No
Replace the PFC module.
Problem solved.
Check whether the inductance
of the PFC module is good?
If the inductance is good,
the resistance of the
two ports, is 0.
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