MLCAC-UTSM-2010-10 Troubleshooting
Outdoor Units 103
10.3.2.9. E6 malfunction (Only for 36K, 48K with 1 phase)
E6 display
PFC module protection
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Yes
Check whether the voltage
range of P-N on IPM
module is normal?
DC277-
410V for 36K/48KBtu/h
No
Check whether the
inductance of PFC module
is good? If the inductance is
good, the resistance of the
two ports is 0
Yes
Replace the inductance
No
Connect it tightly, check
normal or not
Replace the outdoor main board
Yes
Yes
No
No
Replace the PFC module Trouble is solved
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