ERS EMCH-10W/1, Installation And User Manual

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18.5.5 E6
The contents in are just for single phase units.
E6: Malfunction of outdoor unit DC fan motor
Refers to the wiring diagram to check
whether the DC fan motor wiring is correct
NO
Connect again
YES
Check voltage of the DC fan
motor, the normal voltage
between red and black
terminal should be 277~ 354V
when standby
YES
Normal voltage between DC fan motor’s white
terminal and black terminal should be 15V
when standby
No
Replace IPM module
Yes
The outdoor DC fan starts after the
indoor fan operates for 3 minutes
Check voltage of PFC
module “+” and “-”,
the normal voltage
should be 277~ 354V
Replace
PFC module
NO
NO
YES
Yes
PCB is damaged
Replace PCB
No
Voltage between DC
fan motor’s black and
black terminal is lower
than 2.4V
No
Replace DC
fan motor
Yes
Fan motor terminal
80
V.2