Replace The Fan - Haier H-MRV Series Service Manual

6.
Models with wired controller
Readout: E8
Description: Transmission error between wire controller and indoor unit mainboard
Check if the wire controller is
properly connected to A, B and C
of indoor unit.
Check if the voltage between A and B is
+12VDC?
Check if the voltage between C and B
changes regularly?
7.
Models with wired controller
Readout: N/A
Description: PG failure in the fan of indoor unit
Check if the fan is properly
connected to the mainboard.
Yes
Check if PIN 3 and 1 of CN2 (color
models) or CN8 (regular models) are up to
DC 5V.
Yes
Check if there is pulse output
from PIN2 and 1 of CN2 or
CN8.
No

Replace the fan.

No
Yes
Yes
Yes
>a__WcU[S^ <[c >a`V[e[a`Wc
Models with wireless remote controller
/
Reconnect
No
Replace indoor
unit mainboard
Replace the wire
No
controller
Models with wireless remote controller
10 flashes
No
Replace the indoor unit
mainboard.
-190-
Note: CN15 and CN17 of AE series should be
short connected.