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Midea ATOM MDV-V56WDHN1(AtB) - Page 77

Midea ATOM MDV-V56WDHN1(AtB)
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Atom B Series VRF 50/60Hz
76
Midea
Atom B
Series
Service Manual
2.20 P8: Typhoon protection (For all models)
2.20.1 Digital display output
P8
2.20.2 Description
P8 indicates strong wind protection.
The system stops running.
Error code is displayed on the outdoor unit PCB.
2.20.3 Trigger / recover condition
Trigger condition:
Fan speed ≥400rps when the outdoor unit is not start up. Or fan speed over 400rps for 90S when outdoor unit stop for
malfunction.
Recover condition: Detect the fan speed < 400rps for more than 120S.
Reset method: Resume automatically.
2.20.4 Possible causes
There is strong wind around the outdoor unit.
DC fan motor is damaged.
Main PCB damaged.
2.20.5 Procedure
P8
Whether the fan blade was blow to high
speed in standby
Yes
Trigger the protect
function, Wait unit the
strong wind stops
1
No
Check history fault
code to analyze
Yes
Power off for 3 minutes and then repower
on to confirm whether the fault is cleared
No
Power off and pull up CN17(white) and
CN19(black) of DC motor wire, repower
on to confirm whether report E6 code
protection
No
ODU main control
board damaged
Yes
Check whether DC motor is normal
Yes
No
DC motor is damaged
Notes:
1. P8 protection recovers in 2 minutes when the strong wind stops.

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