Midea MDV-V80W/DN1

MCAC-VTSM-2013-12 R410a Full DC Inverter Mini VRF
Troubleshooting 107
7.5 E6/E8/Eb: DC Fan Malfunction
(E6 is for all models, Eb is for 80/105/180 model, E8 is for 120~160 model)
If the system display twice E6 in 10 minutes, the system will stop and display E8/Eb. When the system
displays E8/Eb, the system can resume only by restarting the machine. At this time, malfunction should
be disposed promptly to avoid further damage.
LED displays E6/E8/Eb
Outdoor unit DC fan cannot work.
Refers to the wiring diagram to check
whether the DC fan wiring is correct or not.
NO
Connect again.
YES
O
Check whether power source and voltage of
DC fan are normal. Check whether the
voltage with black & red terminal connected
to the DC fan plug is 277-354V when standby.
是
YES
Check the Voltage between DC fan motor’s
white terminal and black terminal is 15V when
standby.
YES
Replace IPM module.
Replace the main PCB.
YES
Whether the outdoor fan will work after the
indoor fan operates for 3 minutes.
Check PFC module.
“+””-” terminal voltage
is from 277V to 345V.
Replace PFC
module.
NO
NO
YES
NO
Check whether
the yellow and
black terminal
voltage of the fan
plug is over 2.4V.
Replace the
related fan.
NO
YES
YES